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Merge branch 'master' of github.com:fireeye/capa

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William Ballenthin
2020-07-22 12:07:02 -06:00
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.github/workflows/tests.yml
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name: CI
on:
push:
branches: [ master ]
pull_request:
branches: [ master ]
jobs:
code_style:
runs-on: ubuntu-latest
steps:
- name: Checkout capa
uses: actions/checkout@v2
- name: Set up Python 3.8
uses: actions/setup-python@v2
with:
python-version: 3.8
- name: Install dependencies
run: pip install 'isort==5.*' black
- name: Lint with isort
run: isort --profile black --length-sort --line-width 120 -c .
- name: Lint with black
run: black -l 120 --check .
rule_linter:
runs-on: ubuntu-latest
steps:
- name: Checkout capa with rules submodule
uses: actions/checkout@v2
with:
submodules: true
- name: Set up Python 3.8
uses: actions/setup-python@v2
with:
python-version: 3.8
# We don't need vivisect, so we can install capa using Python3
- name: Install capa
run: pip install -e .
- name: Run rule linter
run: python scripts/lint.py rules/
LICENSE.txt
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README.md
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![capa](.github/logo.png)
[![Number of rules](https://img.shields.io/badge/rules-261-blue.svg)](https://github.com/fireeye/capa-rules)
[![Code style checkers status](https://github.com/fireeye/capa/workflows/CI/badge.svg)](https://github.com/fireeye/capa/actions?query=workflow%3A%22CI%22)
[![Number of rules](https://img.shields.io/badge/rules-262-blue.svg)](https://github.com/fireeye/capa-rules)
[![License](https://img.shields.io/badge/license-Apache--2.0-green.svg)](LICENSE.txt)
capa detects capabilities in executable files.
You run it against a PE file or shellcode and it tells you what it thinks the program can do.
For example, it might suggest that the file is a backdoor, is capable of installing services, or relies on HTTP to communicate.
Check out the overview in our first [capa blog post](https://www.fireeye.com/blog/threat-research/2020/07/capa-automatically-identify-malware-capabilities.html).
```
$ capa.exe suspicious.exe
@@ -56,12 +60,14 @@ $ capa.exe suspicious.exe
# download and usage
Download stable releases of the standalone capa binaries [here](/releases). You can run the standalone binaries without installation.
Download stable releases of the standalone capa binaries [here](https://github.com/fireeye/capa/releases). You can run the standalone binaries without installation. capa is a command line tool that should be run from the terminal.
<!--
Alternatively, you can fetch a nightly build of a standalone binary from one of the following links. These are built using the latest development branch.
- Windows 64bit: TODO
- Linux: TODO
- OSX: TODO
-->
To use capa as a library or integrate with another tool, see [doc/installation.md](doc/installation.md) for further setup instructions.
capa/features/extractors/viv/__init__.py
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import types
import viv_utils
import file
import insn
import function
import viv_utils
import basicblock
import capa.features.extractors
import capa.features.extractors.viv.file
import capa.features.extractors.viv.insn
capa/features/freeze.py
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@@ -205,6 +205,7 @@ def load(buf):
def main(argv=None):
import sys
import argparse
import capa.main
if argv is None:
capa/main.py
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import hashlib
import logging
import os.path
import argparse
import datetime
import textwrap
import collections
import tqdm
import argparse
import colorama
import capa.rules
capa/render/__init__.py
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def render_default(meta, rules, capabilities):
# break import loop
import capa.render.verbose
import capa.render.default
import capa.render.verbose
doc = convert_capabilities_to_result_document(meta, rules, capabilities)
return capa.render.default.render_default(doc)
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doc/installation.md
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The capa [README](../README.md#download) also links to nightly builds of standalone binaries from the latest development branch.
### MacOS Standalone installation
By default, on MacOS Catalina or greater, Gatekeeper will block execution of the standalone binary. To resolve this, simply try to execute it once on the command-line and then go to `System Preferences` / `Security & Privacy` / `General` and approve the application:
![approve dialog](img/approve.png)
## Method 2: Using capa as a Python library
To install capa as a Python library, you'll need to install a few dependencies, and then use `pip` to fetch the capa module.
Note: this technique doesn't pull the default rule set, so you should check it out separately from [capa-rules](https://github.com/fireeye/capa-rules/) and pass the directory to the entrypoint using `-r`.
@@ -59,7 +65,7 @@ You'll find that the `capa.exe` (Windows) or `capa` (Linux) executables in your
We use the following tools to ensure consistent code style and formatting:
- [black](https://github.com/psf/black) code formatter, with `-l 120`
- [isort](https://pypi.org/project/isort/) code formatter, with `--length-sort --line-width 120`
- [isort 5](https://pypi.org/project/isort/) code formatter, with `--profile black --length-sort --line-width 120`
- [dos2unix](https://linux.die.net/man/1/dos2unix) for UNIX-style LF newlines
- [capafmt](https://github.com/fireeye/capa/blob/master/scripts/capafmt.py) rule formatter
rules
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Submodule rules updated: 0357195d66...d497b4472c
scripts/capafmt.py
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@@ -10,7 +10,6 @@ Copyright (C) 2020 FireEye, Inc. All Rights Reserved.
"""
import sys
import logging
import argparse
import capa.rules
scripts/lint.py
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import hashlib
import logging
import os.path
import argparse
import itertools
import posixpath
import argparse
import capa.main
import capa.engine
import capa.features
@@ -137,10 +136,12 @@ class MissingExampleOffset(Lint):
def check_rule(self, ctx, rule):
if rule.meta.get("scope") in ("function", "basic block"):
for example in rule.meta.get("examples", []):
if example and ":" not in example:
logger.debug("example: %s", example)
return True
examples = rule.meta.get("examples")
if isinstance(examples, list):
for example in examples:
if example and ":" not in example:
logger.debug("example: %s", example)
return True
class ExampleFileDNE(Lint):
scripts/migrate-rules.py
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import sys
import logging
import os.path
import collections
import argparse
import collections
import capa.rules
scripts/show-capabilities-by-function.py
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@@ -45,9 +45,9 @@ Copyright (C) 2020 FireEye, Inc. All Rights Reserved.
import os
import sys
import logging
import argparse
import collections
import argparse
import colorama
import capa.main
scripts/show-features.py
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@@ -60,7 +60,6 @@ Copyright (C) 2020 FireEye, Inc. All Rights Reserved.
"""
import sys
import logging
import argparse
import capa.main
tests/test_freeze.py
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import textwrap
from fixtures import *
import capa.main
import capa.helpers
import capa.features
import capa.features.insn
import capa.features.freeze
import capa.features.extractors
from fixtures import *
EXTRACTOR = capa.features.extractors.NullFeatureExtractor(
{
tests/test_main.py
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@@ -2,12 +2,13 @@
import textwrap
from fixtures import *
import capa.main
import capa.rules
import capa.engine
import capa.features
import capa.features.extractors.viv
from fixtures import *
from capa.engine import *
tests/test_viv_features.py
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@@ -1,6 +1,7 @@
# Copyright (C) 2020 FireEye, Inc. All Rights Reserved.
import viv_utils
from fixtures import *
import capa.features
import capa.features.file
@@ -10,7 +11,6 @@ import capa.features.extractors.viv.file
import capa.features.extractors.viv.insn
import capa.features.extractors.viv.function
import capa.features.extractors.viv.basicblock
from fixtures import *
def extract_file_features(vw, path):