resolve merge conflict

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: true
       matrix:
         include:
-          - os: ubuntu-18.04
+          - os: ubuntu-20.04
             # use old linux so that the shared library versioning is more portable
             artifact_name: capa
             asset_name: linux
@@ -36,7 +36,7 @@ jobs:
         uses: actions/setup-python@d27e3f3d7c64b4bbf8e4abfb9b63b83e846e0435 # v4.5.0
         with:
           python-version: 3.8
-      - if: matrix.os == 'ubuntu-18.04'
+      - if: matrix.os == 'ubuntu-20.04'
         run: sudo apt-get install -y libyaml-dev
       - name: Upgrade pip, setuptools
         run: python -m pip install --upgrade pip setuptools
@@ -65,10 +65,7 @@ jobs:
       matrix:
         include:
           # OSs not already tested above
-          - os: ubuntu-18.04
-            artifact_name: capa
-            asset_name: linux
-          - os: ubuntu-20.04
+          - os: ubuntu-22.04
             artifact_name: capa
             asset_name: linux
           - os: windows-2022

.github/workflows/tests.yml

@@ -76,6 +76,8 @@ jobs:
             python-version: "3.8"
           - os: ubuntu-20.04
             python-version: "3.9"
+          - os: ubuntu-20.04
+            python-version: "3.10"
     steps:
     - name: Checkout capa with submodules
       uses: actions/checkout@ac593985615ec2ede58e132d2e21d2b1cbd6127c # v3.3.0
@@ -96,6 +98,7 @@ jobs:
   binja-tests:
     name: Binary Ninja tests for ${{ matrix.python-version }} on ${{ matrix.os }}
     runs-on: ubuntu-20.04
+    needs: [code_style, rule_linter]
     strategy:
       fail-fast: false
       matrix:

CHANGELOG.md

@@ -4,13 +4,14 @@
 
 ### New Features
 - add protobuf format for result documents #1219 @williballenthin @mr-tz 
-
 - extractor: add Binary Ninja feature extractor @xusheng6
 - new cli flag `--os` to override auto-detected operating system for a sample @captainGeech42
+- Change colour/highlight to "cyan" instead of "blue" for easy noticing.#1384 @ggold7046
+- add new format to parse output json back to capa #1396 @ooprathamm
 
 ### Breaking Changes
 
-### New Rules (22)
+### New Rules (26)
 
 - persistence/scheduled-tasks/schedule-task-via-at joren485
 - data-manipulation/prng/generate-random-numbers-via-rtlgenrandom william.ballenthin@mandiant.com
@@ -34,9 +35,14 @@
 - nursery/set-web-proxy-in-dotnet michael.hunhoff@mandiant.com
 - nursery/check-for-windows-sandbox-via-subdirectory echernofsky@google.com
 - nursery/enumerate-pe-sections-in-dotnet @mr-tz
+- nursery/destroy-software-breakpoint-capability echernofsky@google.com
+- nursery/send-data-to-internet michael.hunhoff@mandiant.com
+- nursery/compiled-with-cx_freeze @mr-tz
+- nursery/contain-a-thread-local-storage-tls-section-in-dotnet michael.hunhoff@mandiant.com
 -
 
 ### Bug Fixes
+- extractor: removed '.dynsym' as the library name for ELF imports #1318 @stevemk14ebr 
 - extractor: fix vivisect loop detection corner case #1310 @mr-tz
 - match: extend OS characteristic to match OS_ANY to all supported OSes #1324 @mike-hunhoff
 - extractor: fix IDA and vivisect string and bytes features overlap and tests #1327 #1336 @xusheng6 

README.md

@@ -2,7 +2,7 @@
 
 [![PyPI - Python Version](https://img.shields.io/pypi/pyversions/flare-capa)](https://pypi.org/project/flare-capa)
 [![Last release](https://img.shields.io/github/v/release/mandiant/capa)](https://github.com/mandiant/capa/releases)
-[![Number of rules](https://img.shields.io/badge/rules-789-blue.svg)](https://github.com/mandiant/capa-rules)
+[![Number of rules](https://img.shields.io/badge/rules-794-blue.svg)](https://github.com/mandiant/capa-rules)
 [![CI status](https://github.com/mandiant/capa/workflows/CI/badge.svg)](https://github.com/mandiant/capa/actions?query=workflow%3ACI+event%3Apush+branch%3Amaster)
 [![Downloads](https://img.shields.io/github/downloads/mandiant/capa/total)](https://github.com/mandiant/capa/releases)
 [![License](https://img.shields.io/badge/license-Apache--2.0-green.svg)](LICENSE.txt)

capa/features/common.py

@@ -450,6 +450,7 @@ FORMAT_AUTO = "auto"
 FORMAT_SC32 = "sc32"
 FORMAT_SC64 = "sc64"
 FORMAT_FREEZE = "freeze"
+FORMAT_RESULT = "result"
 FORMAT_UNKNOWN = "unknown"
 
 

capa/features/extractors/binja/file.py

@@ -103,7 +103,7 @@ def extract_file_import_names(bv: BinaryView) -> Iterator[Tuple[Feature, Address
 
         ordinal = sym.ordinal
         if ordinal != 0 and (lib_name != ""):
-            ordinal_name = "#%d" % (ordinal)
+            ordinal_name = f"#{ordinal}"
             for name in capa.features.extractors.helpers.generate_symbols(lib_name, ordinal_name):
                 yield Import(name), addr
 
@@ -147,7 +147,7 @@ def extract_file_format(bv: BinaryView) -> Iterator[Tuple[Feature, Address]]:
         # no file type to return when processing a binary file, but we want to continue processing
         return
     else:
-        raise NotImplementedError("unexpected file format: %d" % view_type)
+        raise NotImplementedError(f"unexpected file format: {view_type}")
 
 
 def extract_features(bv: BinaryView) -> Iterator[Tuple[Feature, Address]]:

capa/features/extractors/binja/find_binja_api.py

@@ -26,7 +26,7 @@ if spec is not None:
 
 
 def find_binja_path() -> str:
-    raw_output = subprocess.check_output(["python", "-c", "%s" % code]).decode("ascii").strip()
+    raw_output = subprocess.check_output(["python", "-c", code]).decode("ascii").strip()
     return bytes.fromhex(raw_output).decode("utf8")
 
 

capa/features/extractors/common.py

@@ -12,11 +12,14 @@ import capa.features.extractors.pefile
 import capa.features.extractors.strings
 from capa.features.common import (
     OS,
+    OS_ANY,
     OS_AUTO,
+    ARCH_ANY,
     FORMAT_PE,
     FORMAT_ELF,
     OS_WINDOWS,
     FORMAT_FREEZE,
+    FORMAT_RESULT,
     Arch,
     Format,
     String,
@@ -27,6 +30,11 @@ from capa.features.address import NO_ADDRESS, Address, FileOffsetAddress
 
 logger = logging.getLogger(__name__)
 
+# match strings for formats
+MATCH_PE = b"MZ"
+MATCH_ELF = b"\x7fELF"
+MATCH_RESULT = b'{"meta":'
+
 
 def extract_file_strings(buf, **kwargs) -> Iterator[Tuple[String, Address]]:
     """
@@ -40,12 +48,14 @@ def extract_file_strings(buf, **kwargs) -> Iterator[Tuple[String, Address]]:
 
 
 def extract_format(buf) -> Iterator[Tuple[Feature, Address]]:
-    if buf.startswith(b"MZ"):
+    if buf.startswith(MATCH_PE):
         yield Format(FORMAT_PE), NO_ADDRESS
-    elif buf.startswith(b"\x7fELF"):
+    elif buf.startswith(MATCH_ELF):
         yield Format(FORMAT_ELF), NO_ADDRESS
     elif is_freeze(buf):
         yield Format(FORMAT_FREEZE), NO_ADDRESS
+    elif buf.startswith(MATCH_RESULT):
+        yield Format(FORMAT_RESULT), NO_ADDRESS
     else:
         # we likely end up here:
         #  1. handling a file format (e.g. macho)
@@ -56,10 +66,13 @@ def extract_format(buf) -> Iterator[Tuple[Feature, Address]]:
 
 
 def extract_arch(buf) -> Iterator[Tuple[Feature, Address]]:
-    if buf.startswith(b"MZ"):
+    if buf.startswith(MATCH_PE):
         yield from capa.features.extractors.pefile.extract_file_arch(pe=pefile.PE(data=buf))
 
-    elif buf.startswith(b"\x7fELF"):
+    elif buf.startswith(MATCH_RESULT):
+        yield Arch(ARCH_ANY), NO_ADDRESS
+
+    elif buf.startswith(MATCH_ELF):
         with contextlib.closing(io.BytesIO(buf)) as f:
             arch = capa.features.extractors.elf.detect_elf_arch(f)
 
@@ -88,9 +101,11 @@ def extract_os(buf, os=OS_AUTO) -> Iterator[Tuple[Feature, Address]]:
     if os != OS_AUTO:
         yield OS(os), NO_ADDRESS
 
-    if buf.startswith(b"MZ"):
+    if buf.startswith(MATCH_PE):
         yield OS(OS_WINDOWS), NO_ADDRESS
-    elif buf.startswith(b"\x7fELF"):
+    elif buf.startswith(MATCH_RESULT):
+        yield OS(OS_ANY), NO_ADDRESS
+    elif buf.startswith(MATCH_ELF):
         with contextlib.closing(io.BytesIO(buf)) as f:
             os = capa.features.extractors.elf.detect_elf_os(f)
 

capa/features/extractors/elf.py

@@ -88,6 +88,7 @@ class Shdr:
     offset: int
     size: int
     link: int
+    entsize: int
     buf: bytes
 
 
@@ -320,12 +321,12 @@ class ELF:
         shent = self.shbuf[shent_offset : shent_offset + self.e_shentsize]
 
         if self.bitness == 32:
-            sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link = struct.unpack_from(
-                self.endian + "IIIIIII", shent, 0x0
+            sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link, _, _, sh_entsize = struct.unpack_from(
+                self.endian + "IIIIIIIIII", shent, 0x0
             )
         elif self.bitness == 64:
-            sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link = struct.unpack_from(
-                self.endian + "IIQQQQI", shent, 0x0
+            sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link, _, _, sh_entsize = struct.unpack_from(
+                self.endian + "IIQQQQIIQQ", shent, 0x0
             )
         else:
             raise NotImplementedError()
@@ -337,7 +338,7 @@ class ELF:
         if len(buf) != sh_size:
             raise ValueError("failed to read section header content")
 
-        return Shdr(sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link, buf)
+        return Shdr(sh_name, sh_type, sh_flags, sh_addr, sh_offset, sh_size, sh_link, sh_entsize, buf)
 
     @property
     def section_headers(self):
@@ -502,6 +503,23 @@ class ELF:
 
             yield read_cstr(strtab, d_val)
 
+    @property
+    def symtab(self) -> Optional[Tuple[Shdr, Shdr]]:
+        """
+        fetch the Shdr for the symtab and the associated strtab.
+        """
+        SHT_SYMTAB = 0x2
+        for shdr in self.section_headers:
+            if shdr.type != SHT_SYMTAB:
+                continue
+
+            # the linked section contains strings referenced by the symtab structures.
+            strtab_shdr = self.parse_section_header(shdr.link)
+
+            return shdr, strtab_shdr
+
+        return None
+
 
 @dataclass
 class ABITag:
@@ -603,11 +621,76 @@ class SHNote:
         return ABITag(os, kmajor, kminor, kpatch)
 
 
-def guess_os_from_osabi(elf) -> Optional[OS]:
+@dataclass
+class Symbol:
+    name_offset: int
+    value: int
+    size: int
+    info: int
+    other: int
+    shndx: int
+
+
+class SymTab:
+    def __init__(
+        self,
+        endian: str,
+        bitness: int,
+        symtab: Shdr,
+        strtab: Shdr,
+    ) -> None:
+        self.symbols: List[Symbol] = []
+
+        self.symtab = symtab
+        self.strtab = strtab
+
+        self._parse(endian, bitness, symtab.buf)
+
+    def _parse(self, endian: str, bitness: int, symtab_buf: bytes) -> None:
+        """
+        return the symbol's information in
+        the order specified by sys/elf32.h
+        """
+        for i in range(int(len(self.symtab.buf) / self.symtab.entsize)):
+            if bitness == 32:
+                name_offset, value, size, info, other, shndx = struct.unpack_from(
+                    endian + "IIIBBH", symtab_buf, i * self.symtab.entsize
+                )
+            elif bitness == 64:
+                name_offset, info, other, shndx, value, size = struct.unpack_from(
+                    endian + "IBBBQQ", symtab_buf, i * self.symtab.entsize
+                )
+
+            self.symbols.append(Symbol(name_offset, value, size, info, other, shndx))
+
+    def get_name(self, symbol: Symbol) -> str:
+        """
+        fetch a symbol's name from symtab's
+        associated strings' section (SHT_STRTAB)
+        """
+        if not self.strtab:
+            raise ValueError("no strings found")
+
+        for i in range(symbol.name_offset, self.strtab.size):
+            if self.strtab.buf[i] == 0:
+                return self.strtab.buf[symbol.name_offset : i].decode("utf-8")
+
+        raise ValueError("symbol name not found")
+
+    def get_symbols(self) -> Iterator[Symbol]:
+        """
+        return a tuple: (name, value, size, info, other, shndx)
+        for each symbol contained in the symbol table
+        """
+        for symbol in self.symbols:
+            yield symbol
+
+
+def guess_os_from_osabi(elf: ELF) -> Optional[OS]:
     return elf.ei_osabi
 
 
-def guess_os_from_ph_notes(elf) -> Optional[OS]:
+def guess_os_from_ph_notes(elf: ELF) -> Optional[OS]:
     # search for PT_NOTE sections that specify an OS
     # for example, on Linux there is a GNU section with minimum kernel version
     PT_NOTE = 0x4
@@ -646,7 +729,7 @@ def guess_os_from_ph_notes(elf) -> Optional[OS]:
     return None
 
 
-def guess_os_from_sh_notes(elf) -> Optional[OS]:
+def guess_os_from_sh_notes(elf: ELF) -> Optional[OS]:
     # search for notes stored in sections that aren't visible in program headers.
     # e.g. .note.Linux in Linux kernel modules.
     SHT_NOTE = 0x7
@@ -679,7 +762,7 @@ def guess_os_from_sh_notes(elf) -> Optional[OS]:
     return None
 
 
-def guess_os_from_linker(elf) -> Optional[OS]:
+def guess_os_from_linker(elf: ELF) -> Optional[OS]:
     # search for recognizable dynamic linkers (interpreters)
     # for example, on linux, we see file paths like: /lib64/ld-linux-x86-64.so.2
     linker = elf.linker
@@ -689,7 +772,7 @@ def guess_os_from_linker(elf) -> Optional[OS]:
     return None
 
 
-def guess_os_from_abi_versions_needed(elf) -> Optional[OS]:
+def guess_os_from_abi_versions_needed(elf: ELF) -> Optional[OS]:
     # then lets look for GLIBC symbol versioning requirements.
     # this will let us guess about linux/hurd in some cases.
 
@@ -720,7 +803,7 @@ def guess_os_from_abi_versions_needed(elf) -> Optional[OS]:
     return None
 
 
-def guess_os_from_needed_dependencies(elf) -> Optional[OS]:
+def guess_os_from_needed_dependencies(elf: ELF) -> Optional[OS]:
     for needed in elf.needed:
         if needed.startswith("libmachuser.so"):
             return OS.HURD
@@ -730,6 +813,33 @@ def guess_os_from_needed_dependencies(elf) -> Optional[OS]:
     return None
 
 
+def guess_os_from_symtab(elf: ELF) -> Optional[OS]:
+    shdrs = elf.symtab
+    if not shdrs:
+        # executable does not contain a symbol table
+        # or the symbol's names are stripped
+        return None
+
+    symtab_shdr, strtab_shdr = shdrs
+    symtab = SymTab(elf.endian, elf.bitness, symtab_shdr, strtab_shdr)
+
+    keywords = {
+        OS.LINUX: [
+            "linux",
+            "/linux/",
+        ],
+    }
+
+    for symbol in symtab.get_symbols():
+        sym_name = symtab.get_name(symbol)
+
+        for os, hints in keywords.items():
+            if any(map(lambda x: x in sym_name, hints)):
+                return os
+
+    return None
+
+
 def detect_elf_os(f) -> str:
     """
     f: type Union[BinaryIO, IDAIO]
@@ -754,6 +864,9 @@ def detect_elf_os(f) -> str:
     needed_dependencies_guess = guess_os_from_needed_dependencies(elf)
     logger.debug("guess: needed dependencies: %s", needed_dependencies_guess)
 
+    symtab_guess = guess_os_from_symtab(elf)
+    logger.debug("guess: pertinent symbol name: %s", symtab_guess)
+
     ret = None
 
     if osabi_guess:
@@ -774,6 +887,9 @@ def detect_elf_os(f) -> str:
     elif needed_dependencies_guess:
         ret = needed_dependencies_guess
 
+    elif symtab_guess:
+        ret = symtab_guess
+
     return ret.value if ret is not None else "unknown"
 
 

capa/features/extractors/ida/helpers.py

@@ -90,8 +90,11 @@ def get_file_imports() -> Dict[int, Tuple[str, str, int]]:
         if not library:
             continue
 
-        # IDA uses section names for the library of ELF imports, like ".dynsym"
-        library = library.lstrip(".")
+        # IDA uses section names for the library of ELF imports, like ".dynsym".
+        # These are not useful to us, we may need to expand this list over time
+        # TODO: exhaust this list, see #1419
+        if library == ".dynsym":
+            library = ""
 
         def inspect_import(ea, function, ordinal):
             if function and function.startswith("__imp_"):

capa/features/insn.py

@@ -70,7 +70,7 @@ class Number(Feature):
         elif isinstance(self.value, float):
             return str(self.value)
         else:
-            raise ValueError("invalid value type %s" % (type(self.value)))
+            raise ValueError(f"invalid value type {type(self.value)}")
 
 
 # max recognized structure size (and therefore, offset size)

capa/main.py

@@ -69,6 +69,7 @@ from capa.features.common import (
     FORMAT_SC64,
     FORMAT_DOTNET,
     FORMAT_FREEZE,
+    FORMAT_RESULT,
 )
 from capa.features.address import NO_ADDRESS, Address
 from capa.features.extractors.base_extractor import BBHandle, InsnHandle, FunctionHandle, FeatureExtractor
@@ -498,7 +499,7 @@ def get_workspace(path, format_, sigpaths):
 def get_extractor(
     path: str,
     format_: str,
-    os: str,
+    os_: str,
     backend: str,
     sigpaths: List[str],
     should_save_workspace=False,
@@ -517,7 +518,7 @@ def get_extractor(
         if not is_supported_arch(path):
             raise UnsupportedArchError()
 
-        if os == OS_AUTO and not is_supported_os(path):
+        if os_ == OS_AUTO and not is_supported_os(path):
             raise UnsupportedOSError()
 
     if format_ == FORMAT_DOTNET:
@@ -548,7 +549,7 @@ def get_extractor(
         with halo.Halo(text="analyzing program", spinner="simpleDots", stream=sys.stderr, enabled=not disable_progress):
             bv: BinaryView = BinaryViewType.get_view_of_file(path)
             if bv is None:
-                raise RuntimeError("Binary Ninja cannot open file %s" % (path))
+                raise RuntimeError(f"Binary Ninja cannot open file {path}")
 
         return capa.features.extractors.binja.extractor.BinjaFeatureExtractor(bv)
 
@@ -569,7 +570,7 @@ def get_extractor(
             else:
                 logger.debug("CAPA_SAVE_WORKSPACE unset, not saving workspace")
 
-        return capa.features.extractors.viv.extractor.VivisectFeatureExtractor(vw, path, os)
+        return capa.features.extractors.viv.extractor.VivisectFeatureExtractor(vw, path, os_)
 
 
 def get_file_extractors(sample: str, format_: str) -> List[FeatureExtractor]:
@@ -913,12 +914,12 @@ def install_common_args(parser, wanted=None):
             (OS_MACOS,),
             (OS_WINDOWS,),
         ]
-        os_help = ", ".join(["%s (%s)" % (o[0], o[1]) if len(o) == 2 else o[0] for o in oses])
+        os_help = ", ".join([f"{o[0]} ({o[1]})" if len(o) == 2 else o[0] for o in oses])
         parser.add_argument(
             "--os",
             choices=[o[0] for o in oses],
             default=OS_AUTO,
-            help="select sample OS: %s" % os_help,
+            help=f"select sample OS: {os_help}",
         )
 
     if "rules" in wanted:
@@ -1182,53 +1183,72 @@ def main(argv=None):
                 logger.debug("file limitation short circuit, won't analyze fully.")
                 return E_FILE_LIMITATION
 
-    if format_ == FORMAT_FREEZE:
-        with open(args.sample, "rb") as f:
-            extractor = capa.features.freeze.load(f.read())
+    # TODO: #1411 use a real type, not a dict here.
+    meta: Dict[str, Any]
+    capabilities: MatchResults
+    counts: Dict[str, Any]
+
+    if format_ == FORMAT_RESULT:
+        # result document directly parses into meta, capabilities
+        result_doc = capa.render.result_document.ResultDocument.parse_file(args.sample)
+        meta, capabilities = result_doc.to_capa()
+
     else:
-        try:
-            if format_ == FORMAT_PE:
-                sig_paths = get_signatures(args.signatures)
-            else:
-                sig_paths = []
-                logger.debug("skipping library code matching: only have native PE signatures")
-        except IOError as e:
-            logger.error("%s", str(e))
-            return E_INVALID_SIG
+        # all other formats we must create an extractor
+        # and use that to extract meta and capabilities
 
-        should_save_workspace = os.environ.get("CAPA_SAVE_WORKSPACE") not in ("0", "no", "NO", "n", None)
+        if format_ == FORMAT_FREEZE:
+            # freeze format deserializes directly into an extractor
+            with open(args.sample, "rb") as f:
+                extractor = capa.features.freeze.load(f.read())
+        else:
+            # all other formats we must create an extractor,
+            # such as viv, binary ninja, etc. workspaces
+            # and use those for extracting.
 
-        try:
-            extractor = get_extractor(
-                args.sample,
-                format_,
-                args.os,
-                args.backend,
-                sig_paths,
-                should_save_workspace,
-                disable_progress=args.quiet,
-            )
-        except UnsupportedFormatError:
-            log_unsupported_format_error()
-            return E_INVALID_FILE_TYPE
-        except UnsupportedArchError:
-            log_unsupported_arch_error()
-            return E_INVALID_FILE_ARCH
-        except UnsupportedOSError:
-            log_unsupported_os_error()
-            return E_INVALID_FILE_OS
+            try:
+                if format_ == FORMAT_PE:
+                    sig_paths = get_signatures(args.signatures)
+                else:
+                    sig_paths = []
+                    logger.debug("skipping library code matching: only have native PE signatures")
+            except IOError as e:
+                logger.error("%s", str(e))
+                return E_INVALID_SIG
 
-    meta = collect_metadata(argv, args.sample, args.format, args.os, args.rules, extractor)
+            should_save_workspace = os.environ.get("CAPA_SAVE_WORKSPACE") not in ("0", "no", "NO", "n", None)
 
-    capabilities, counts = find_capabilities(rules, extractor, disable_progress=args.quiet)
-    meta["analysis"].update(counts)
-    meta["analysis"]["layout"] = compute_layout(rules, extractor, capabilities)
+            try:
+                extractor = get_extractor(
+                    args.sample,
+                    format_,
+                    args.os,
+                    args.backend,
+                    sig_paths,
+                    should_save_workspace,
+                    disable_progress=args.quiet,
+                )
+            except UnsupportedFormatError:
+                log_unsupported_format_error()
+                return E_INVALID_FILE_TYPE
+            except UnsupportedArchError:
+                log_unsupported_arch_error()
+                return E_INVALID_FILE_ARCH
+            except UnsupportedOSError:
+                log_unsupported_os_error()
+                return E_INVALID_FILE_OS
 
-    if has_file_limitation(rules, capabilities):
-        # bail if capa encountered file limitation e.g. a packed binary
-        # do show the output in verbose mode, though.
-        if not (args.verbose or args.vverbose or args.json):
-            return E_FILE_LIMITATION
+        meta = collect_metadata(argv, args.sample, args.format, args.os, args.rules, extractor)
+
+        capabilities, counts = find_capabilities(rules, extractor, disable_progress=args.quiet)
+        meta["analysis"].update(counts)
+        meta["analysis"]["layout"] = compute_layout(rules, extractor, capabilities)
+
+        if has_file_limitation(rules, capabilities):
+            # bail if capa encountered file limitation e.g. a packed binary
+            # do show the output in verbose mode, though.
+            if not (args.verbose or args.vverbose or args.json):
+                return E_FILE_LIMITATION
 
     if args.json:
         print(capa.render.json.render(meta, rules, capabilities))

capa/render/proto/__init__.py

@@ -502,27 +502,36 @@ def metadata_from_pb2(meta: capa_pb2.Metadata) -> rd.Metadata:
             rules=tuple(meta.analysis.rules),
             base_address=addr_from_pb2(meta.analysis.base_address),
             layout=rd.Layout(
-                functions=[
-                    rd.FunctionLayout(
-                        address=addr_from_pb2(f.address),
-                        matched_basic_blocks=[
-                            rd.BasicBlockLayout(address=addr_from_pb2(bb.address)) for bb in f.matched_basic_blocks
-                        ],
-                    )
-                    for f in meta.analysis.layout.functions
-                ]
+                functions=tuple(
+                    [
+                        rd.FunctionLayout(
+                            address=addr_from_pb2(f.address),
+                            matched_basic_blocks=tuple(
+                                [
+                                    rd.BasicBlockLayout(address=addr_from_pb2(bb.address))
+                                    for bb in f.matched_basic_blocks
+                                ]
+                            ),
+                        )
+                        for f in meta.analysis.layout.functions
+                    ]
+                )
             ),
             feature_counts=rd.FeatureCounts(
                 file=meta.analysis.feature_counts.file,
-                functions=[
-                    rd.FunctionFeatureCount(address=addr_from_pb2(f.address), count=f.count)
-                    for f in meta.analysis.feature_counts.functions
-                ],
+                functions=tuple(
+                    [
+                        rd.FunctionFeatureCount(address=addr_from_pb2(f.address), count=f.count)
+                        for f in meta.analysis.feature_counts.functions
+                    ]
+                ),
+            ),
+            library_functions=tuple(
+                [
+                    rd.LibraryFunction(address=addr_from_pb2(lf.address), name=lf.name)
+                    for lf in meta.analysis.library_functions
+                ]
             ),
-            library_functions=[
-                rd.LibraryFunction(address=addr_from_pb2(lf.address), name=lf.name)
-                for lf in meta.analysis.library_functions
-            ],
         ),
     )
 
@@ -585,13 +594,14 @@ def feature_from_pb2(f: capa_pb2.FeatureNode) -> frzf.Feature:
         return frzf.ExportFeature(export=ff.export, description=ff.description or None)
     elif type_ == "import_":
         ff = f.import_
-        return frzf.ImportFeature(import_=ff.import_, description=ff.description or None)
+        return frzf.ImportFeature(import_=ff.import_, description=ff.description or None)  # type: ignore
+        # Mypy is unable to recognize `import_` as an argument
     elif type_ == "section":
         ff = f.section
         return frzf.SectionFeature(section=ff.section, description=ff.description or None)
     elif type_ == "function_name":
         ff = f.function_name
-        return frzf.FunctionNameFeature(function_name=ff.function_name, description=ff.description or None)
+        return frzf.FunctionNameFeature(function_name=ff.function_name, description=ff.description or None)  # type: ignore
     elif type_ == "substring":
         ff = f.substring
         return frzf.SubstringFeature(substring=ff.substring, description=ff.description or None)
@@ -603,7 +613,8 @@ def feature_from_pb2(f: capa_pb2.FeatureNode) -> frzf.Feature:
         return frzf.StringFeature(string=ff.string, description=ff.description or None)
     elif type_ == "class_":
         ff = f.class_
-        return frzf.ClassFeature(class_=ff.class_, description=ff.description or None)
+        return frzf.ClassFeature(class_=ff.class_, description=ff.description or None)  # type: ignore
+        # Mypy is unable to recognize `class_` as an argument due to aliasing
     elif type_ == "namespace":
         ff = f.namespace
         return frzf.NamespaceFeature(namespace=ff.namespace, description=ff.description or None)
@@ -629,12 +640,13 @@ def feature_from_pb2(f: capa_pb2.FeatureNode) -> frzf.Feature:
         ff = f.operand_number
         return frzf.OperandNumberFeature(
             index=ff.index, operand_number=number_from_pb2(ff.operand_number), description=ff.description or None
-        )
+        )  # type: ignore
     elif type_ == "operand_offset":
         ff = f.operand_offset
         return frzf.OperandOffsetFeature(
             index=ff.index, operand_offset=int_from_pb2(ff.operand_offset), description=ff.description or None
-        )
+        )  # type: ignore
+        # Mypy is unable to recognize `operand_offset` as an argument due to aliasing
     elif type_ == "basic_block":
         ff = f.basic_block
         return frzf.BasicBlockFeature(description=ff.description or None)
@@ -651,16 +663,16 @@ def match_from_pb2(match: capa_pb2.Match) -> rd.Match:
         return rd.Match(
             success=match.success,
             node=rd.StatementNode(statement=statement_from_pb2(match.statement)),
-            children=children,
-            locations=locations,
+            children=tuple(children),
+            locations=tuple(locations),
             captures={},
         )
     elif node_type == "feature":
         return rd.Match(
             success=match.success,
             node=rd.FeatureNode(feature=feature_from_pb2(match.feature)),
-            children=children,
-            locations=locations,
+            children=tuple(children),
+            locations=tuple(locations),
             captures={capture: tuple(map(addr_from_pb2, locs.address)) for capture, locs in match.captures.items()},
         )
     else:
@@ -694,7 +706,8 @@ def maec_from_pb2(pb: capa_pb2.MaecMetadata) -> rd.MaecMetadata:
         malware_family=pb.malware_family or None,
         malware_category=pb.malware_category or None,
         malware_category_ov=pb.malware_category_ov or None,
-    )
+    )  # type: ignore
+    # Mypy is unable to recognise arguments due to alias
 
 
 def rule_metadata_from_pb2(pb: capa_pb2.RuleMetadata) -> rd.RuleMetadata:
@@ -711,7 +724,8 @@ def rule_metadata_from_pb2(pb: capa_pb2.RuleMetadata) -> rd.RuleMetadata:
         lib=pb.lib,
         is_subscope_rule=pb.is_subscope_rule,
         maec=maec_from_pb2(pb.maec),
-    )
+    )  # type: ignore
+    # Mypy is unable to recognise `attack` and `is_subscope_rule` as arguments due to alias
 
 
 def doc_from_pb2(doc: capa_pb2.ResultDocument) -> rd.ResultDocument:

capa/render/result_document.py

@@ -6,7 +6,8 @@
 #  is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and limitations under the License.
 import datetime
-from typing import Any, Dict, Tuple, Union, Optional
+import collections
+from typing import Any, Dict, List, Tuple, Union, Optional
 
 from pydantic import Field, BaseModel
 
@@ -125,6 +126,41 @@ class Metadata(FrozenModel):
             ),
         )
 
+    def to_capa(self) -> Dict[str, Any]:
+        capa_meta = {
+            "timestamp": self.timestamp.isoformat(),
+            "version": self.version,
+            "sample": {
+                "md5": self.sample.md5,
+                "sha1": self.sample.sha1,
+                "sha256": self.sample.sha256,
+                "path": self.sample.path,
+            },
+            "analysis": {
+                "format": self.analysis.format,
+                "arch": self.analysis.arch,
+                "os": self.analysis.os,
+                "extractor": self.analysis.extractor,
+                "rules": self.analysis.rules,
+                "base_address": self.analysis.base_address.to_capa(),
+                "layout": {
+                    "functions": {
+                        f.address.to_capa(): {
+                            "matched_basic_blocks": [bb.address.to_capa() for bb in f.matched_basic_blocks]
+                        }
+                        for f in self.analysis.layout.functions
+                    }
+                },
+                "feature_counts": {
+                    "file": self.analysis.feature_counts.file,
+                    "functions": {fc.address.to_capa(): fc.count for fc in self.analysis.feature_counts.functions},
+                },
+                "library_functions": {lf.address.to_capa(): lf.name for lf in self.analysis.library_functions},
+            },
+        }
+
+        return capa_meta
+
 
 class CompoundStatementType:
     AND = "and"
@@ -227,6 +263,54 @@ def node_from_capa(node: Union[capa.engine.Statement, capa.engine.Feature]) -> N
         assert_never(node)
 
 
+def node_to_capa(
+    node: Node, children: List[Union[capa.engine.Statement, capa.engine.Feature]]
+) -> Union[capa.engine.Statement, capa.engine.Feature]:
+    if isinstance(node, StatementNode):
+        if isinstance(node.statement, CompoundStatement):
+            if node.statement.type == CompoundStatementType.AND:
+                return capa.engine.And(description=node.statement.description, children=children)
+
+            elif node.statement.type == CompoundStatementType.OR:
+                return capa.engine.Or(description=node.statement.description, children=children)
+
+            elif node.statement.type == CompoundStatementType.NOT:
+                return capa.engine.Not(description=node.statement.description, child=children[0])
+
+            elif node.statement.type == CompoundStatementType.OPTIONAL:
+                return capa.engine.Some(description=node.statement.description, count=0, children=children)
+
+            else:
+                assert_never(node.statement.type)
+
+        elif isinstance(node.statement, SomeStatement):
+            return capa.engine.Some(
+                description=node.statement.description, count=node.statement.count, children=children
+            )
+
+        elif isinstance(node.statement, RangeStatement):
+            return capa.engine.Range(
+                description=node.statement.description,
+                min=node.statement.min,
+                max=node.statement.max,
+                child=node.statement.child.to_capa(),
+            )
+
+        elif isinstance(node.statement, SubscopeStatement):
+            return capa.engine.Subscope(
+                description=node.statement.description, scope=node.statement.scope, child=children[0]
+            )
+
+        else:
+            assert_never(node.statement)
+
+    elif isinstance(node, FeatureNode):
+        return node.feature.to_capa()
+
+    else:
+        assert_never(node)
+
+
 class Match(FrozenModel):
     """
     args:
@@ -359,6 +443,39 @@ class Match(FrozenModel):
             captures={capture: tuple(captures[capture]) for capture in captures},
         )
 
+    def to_capa(self, rules_by_name: Dict[str, capa.rules.Rule]) -> capa.engine.Result:
+        children = [child.to_capa(rules_by_name) for child in self.children]
+        statement = node_to_capa(self.node, [child.statement for child in children])
+
+        if isinstance(self.node, FeatureNode):
+            feature = self.node.feature
+
+            if isinstance(feature, (frzf.SubstringFeature, frzf.RegexFeature)):
+                matches = {capture: {loc.to_capa() for loc in locs} for capture, locs in self.captures.items()}
+
+                if isinstance(feature, frzf.SubstringFeature):
+                    assert isinstance(statement, capa.features.common.Substring)
+                    statement = capa.features.common._MatchedSubstring(statement, matches)
+                elif isinstance(feature, frzf.RegexFeature):
+                    assert isinstance(statement, capa.features.common.Regex)
+                    statement = capa.features.common._MatchedRegex(statement, matches)
+                else:
+                    assert_never(feature)
+
+        # apparently we don't have to fixup match and subscope entries here.
+        # at least, default, verbose, and vverbose renderers seem to work well without any special handling here.
+        #
+        # children contains a single tree of results, corresponding to the logic of the matched rule.
+        # self.node.feature.match contains the name of the rule that was matched.
+        # so its all available to reconstruct, if necessary.
+
+        return capa.features.common.Result(
+            success=self.success,
+            statement=statement,
+            locations={loc.to_capa() for loc in self.locations},
+            children=children,
+        )
+
 
 def parse_parts_id(s: str):
     id_ = ""
@@ -543,3 +660,22 @@ class ResultDocument(FrozenModel):
             )
 
         return ResultDocument(meta=Metadata.from_capa(meta), rules=rule_matches)
+
+    def to_capa(self) -> Tuple[Dict, Dict]:
+        meta = self.meta.to_capa()
+        capabilities: Dict[
+            str, List[Tuple[capa.features.address.Address, capa.features.common.Result]]
+        ] = collections.defaultdict(list)
+
+        # this doesn't quite work because we don't have the rule source for rules that aren't matched.
+        rules_by_name = {
+            rule_name: capa.rules.Rule.from_yaml(rule_match.source) for rule_name, rule_match in self.rules.items()
+        }
+
+        for rule_name, rule_match in self.rules.items():
+            for addr, match in rule_match.matches:
+                result: capa.engine.Result = match.to_capa(rules_by_name)
+
+                capabilities[rule_name].append((addr.to_capa(), result))
+
+        return meta, capabilities

capa/render/utils.py

@@ -16,7 +16,7 @@ import capa.render.result_document as rd
 
 def bold(s: str) -> str:
     """draw attention to the given string"""
-    return termcolor.colored(s, "blue")
+    return termcolor.colored(s, "cyan")
 
 
 def bold2(s: str) -> str:

setup.py

@@ -27,8 +27,8 @@ requirements = [
     "pyelftools==0.29",
     "dnfile==0.13.0",
     "dncil==1.0.2",
-    "pydantic==1.10.6",
-    "protobuf==4.21.12",
+    "pydantic==1.10.7",
+    "protobuf==4.22.1",
 ]
 
 # this sets __version__
@@ -71,7 +71,7 @@ setuptools.setup(
         "dev": [
             "pytest==7.1.3",
             "pytest-sugar==0.9.4",
-            "pytest-instafail==0.4.2",
+            "pytest-instafail==0.5.0",
             "pytest-cov==4.0.0",
             "pycodestyle==2.10.0",
             "ruff==0.0.259",
@@ -90,7 +90,7 @@ setuptools.setup(
             "types-termcolor==1.1.4",
             "types-psutil==5.8.23",
             "types_requests==2.28.1",
-            "types-protobuf==4.21.0.5",
+            "types-protobuf==4.22.0.1",
         ],
         "build": [
             "pyinstaller==5.9.0",

tests/fixtures.py

@@ -241,6 +241,8 @@ def get_data_path_by_name(name):
         return os.path.join(CD, "data", "kernel32-64.dll_")
     elif name == "pma01-01":
         return os.path.join(CD, "data", "Practical Malware Analysis Lab 01-01.dll_")
+    elif name == "pma01-01-rd":
+        return os.path.join(CD, "data", "rd", "Practical Malware Analysis Lab 01-01.dll_.json")
     elif name == "pma12-04":
         return os.path.join(CD, "data", "Practical Malware Analysis Lab 12-04.exe_")
     elif name == "pma16-01":
@@ -307,6 +309,8 @@ def get_data_path_by_name(name):
         return os.path.join(CD, "data", "bf7a9c8bdfa6d47e01ad2b056264acc3fd90cf43fe0ed8deec93ab46b47d76cb.elf_")
     elif name.startswith("294b8d"):
         return os.path.join(CD, "data", "294b8db1f2702b60fb2e42fdc50c2cee6a5046112da9a5703a548a4fa50477bc.elf_")
+    elif name.startswith("2bf18d"):
+        return os.path.join(CD, "data", "2bf18d0403677378adad9001b1243211.elf_")
     else:
         raise ValueError(f"unexpected sample fixture: {name}")
 
@@ -365,6 +369,8 @@ def get_sample_md5_by_name(name):
     elif name.startswith("294b8d"):
         # file name is SHA256 hash
         return "3db3e55b16a7b1b1afb970d5e77c5d98"
+    elif name.startswith("2bf18d"):
+        return "2bf18d0403677378adad9001b1243211"
     else:
         raise ValueError(f"unexpected sample fixture: {name}")
 

tests/test_main.py

@@ -467,3 +467,12 @@ def test_main_dotnet4(_039a6_dotnetfile_extractor):
     # tests successful execution and one rendering
     path = _039a6_dotnetfile_extractor.path
     assert capa.main.main([path, "-vv"]) == 0
+
+
+def test_main_rd():
+    path = fixtures.get_data_path_by_name("pma01-01-rd")
+    assert capa.main.main([path, "-vv"]) == 0
+    assert capa.main.main([path, "-v"]) == 0
+    assert capa.main.main([path, "-j"]) == 0
+    assert capa.main.main([path, "-q"]) == 0
+    assert capa.main.main([path]) == 0

tests/test_os_detection.py

@@ -20,6 +20,7 @@ def test_elf_sh_notes():
     # guess: sh notes: OS.LINUX
     # guess: linker: None
     # guess: ABI versions needed: None
+    # guess: symtab: None
     # guess: needed dependencies: None
     path = get_data_path_by_name("2f7f5f")
     with open(path, "rb") as f:
@@ -32,6 +33,7 @@ def test_elf_pt_notes():
     # guess: sh notes: OS.LINUX
     # guess: linker: OS.LINUX
     # guess: ABI versions needed: OS.LINUX
+    # guess: symtab: None
     # guess: needed dependencies: None
     path = get_data_path_by_name("7351f.elf")
     with open(path, "rb") as f:
@@ -44,6 +46,7 @@ def test_elf_so_needed():
     # guess: sh notes: OS.HURD
     # guess: linker: None
     # guess: ABI versions needed: OS.HURD
+    # guess: symtab: None
     # guess: needed dependencies: OS.HURD
     path = get_data_path_by_name("b5f052")
     with open(path, "rb") as f:
@@ -56,7 +59,21 @@ def test_elf_abi_version_hurd():
     # guess: sh notes: OS.HURD
     # guess: linker: None
     # guess: ABI versions needed: OS.HURD
+    # guess: symtab: None
     # guess: needed dependencies: None
     path = get_data_path_by_name("bf7a9c")
     with open(path, "rb") as f:
         assert capa.features.extractors.elf.detect_elf_os(f) == "hurd"
+
+
+def test_elf_symbol_table():
+    # guess: osabi: None
+    # guess: ph notes: None
+    # guess: sh notes: None
+    # guess: linker: None
+    # guess: ABI versions needed: None
+    # guess: symtab: OS.LINUX
+    # guess: needed dependencies: None
+    path = get_data_path_by_name("2bf18d")
+    with open(path, "rb") as f:
+        assert capa.features.extractors.elf.detect_elf_os(f) == "linux"

tests/test_result_document.py

@@ -8,6 +8,7 @@
 import copy
 
 import pytest
+import fixtures
 from fixtures import *
 
 import capa
@@ -268,3 +269,18 @@ def assert_round_trip(rd: rdoc.ResultDocument):
 def test_round_trip(request, rd_file):
     rd: rdoc.ResultDocument = request.getfixturevalue(rd_file)
     assert_round_trip(rd)
+
+
+def test_json_to_rdoc():
+    path = fixtures.get_data_path_by_name("pma01-01-rd")
+    assert isinstance(rdoc.ResultDocument.parse_file(path), rdoc.ResultDocument)
+
+
+def test_rdoc_to_capa():
+    path = fixtures.get_data_path_by_name("pma01-01-rd")
+
+    rd = rdoc.ResultDocument.parse_file(path)
+
+    meta, capabilites = rd.to_capa()
+    assert isinstance(meta, dict)
+    assert isinstance(capabilites, dict)

tests/test_scripts.py

@@ -81,4 +81,4 @@ def test_proto_conversion(tmpdir):
     p = run_program(get_script_path("proto-to-results.py"), [pb])
     assert p.returncode == 0
 
-    assert p.stdout.startswith(b'{\n  "meta": ')
+    assert p.stdout.startswith(b'{\n  "meta": ') or p.stdout.startswith(b'{\r\n  "meta": ')