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74 lines
3.3 KiB
Python
74 lines
3.3 KiB
Python
# Copyright (C) 2020 Mandiant, Inc. All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at: [package root]/LICENSE.txt
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# Unless required by applicable law or agreed to in writing, software distributed under the License
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# is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and limitations under the License.
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import logging
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from typing import Dict, Tuple, Iterator
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import capa.features.extractors.cape.file
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import capa.features.extractors.cape.thread
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import capa.features.extractors.cape.global_
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import capa.features.extractors.cape.process
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from capa.features.common import Feature
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from capa.features.address import Address, AbsoluteVirtualAddress
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from capa.features.extractors.base_extractor import ThreadHandle, ProcessHandle, DynamicFeatureExtractor
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logger = logging.getLogger(__name__)
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TESTED_VERSIONS = ("2.2-CAPE",)
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class CapeExtractor(DynamicFeatureExtractor):
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def __init__(self, cape_version: str, static: Dict, behavior: Dict):
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super().__init__()
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self.cape_version = cape_version
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self.static = static
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self.behavior = behavior
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self.global_features = capa.features.extractors.cape.global_.extract_features(self.static)
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def get_base_address(self) -> Address:
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# value according to the PE header, the actual trace may use a different imagebase
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return AbsoluteVirtualAddress(self.static["pe"]["imagebase"])
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def extract_global_features(self) -> Iterator[Tuple[Feature, Address]]:
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yield from self.global_features
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def extract_file_features(self) -> Iterator[Tuple[Feature, Address]]:
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yield from capa.features.extractors.cape.file.extract_features(self.static)
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def get_processes(self) -> Iterator[ProcessHandle]:
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yield from capa.features.extractors.cape.file.get_processes(self.behavior)
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def extract_process_features(self, ph: ProcessHandle) -> Iterator[Tuple[Feature, Address]]:
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yield from capa.features.extractors.cape.process.extract_features(self.behavior, ph)
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def get_threads(self, ph: ProcessHandle) -> Iterator[ThreadHandle]:
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yield from capa.features.extractors.cape.process.get_threads(self.behavior, ph)
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def extract_thread_features(self, ph: ProcessHandle, th: ThreadHandle) -> Iterator[Tuple[Feature, Address]]:
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yield from capa.features.extractors.cape.thread.extract_features(self.behavior, ph, th)
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@classmethod
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def from_report(cls, report: Dict) -> "CapeExtractor":
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cape_version = report["info"]["version"]
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if cape_version not in TESTED_VERSIONS:
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logger.warning("CAPE version '%s' not tested/supported yet", cape_version)
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static = report["static"]
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format_ = list(static.keys())[0]
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static = static[format_]
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static.update(report["behavior"].pop("summary"))
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static.update(report["target"])
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static.update({"processtree": report["behavior"]["processtree"]})
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static.update({"strings": report["strings"]})
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static.update({"format": format_})
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behavior = report.pop("behavior")
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behavior["network"] = report.pop("network")
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return cls(cape_version, static, behavior)
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