dynamic: emit complete features for A/W APIs #2409
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Please add bug fixes, new features, breaking changes and anything else you think is worthwhile mentioning to the master (unreleased) section of CHANGELOG.md. If no CHANGELOG update is needed add the following to the PR description: [x] No CHANGELOG update needed
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CHANGELOG updated or no update needed, thanks! 😄
mike-hunhoff
changed the title
williballenthin
approved these changes
Sep 27, 2024
| @@ -50,7 +51,8 @@ def extract_call_features(ph: ProcessHandle, th: ThreadHandle, ch: CallHandle) - | |||
| else: | |||
| assert_never(value) | |||
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| yield API(call.api), ch.address | |||
| for name in capa.features.extractors.helpers.generate_symbols("", call.api): | |||
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we should update this API to accept None when the dll isn't present, not the empty string. But that can happen in another PR.
| @@ -37,6 +37,8 @@ | |||
| ), | |||
| ("0000a657", "process=(1180:3052)", capa.features.common.String("nope"), False), | |||
| # thread/api calls | |||
| ("0000a657", "process=(2900:2852),thread=2904", capa.features.insn.API("RegQueryValueExA"), True), | |||
| ("0000a657", "process=(2900:2852),thread=2904", capa.features.insn.API("RegQueryValueEx"), True), | |||
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perfect, thanks for adding tests
mr-tz
approved these changes
Sep 27, 2024
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closes #2408
This fixes A/W API detection for CAPE, VMRay, and drakvuf where capa rules that specified A/W APIs without the A/W could not be matched e.g. https://github.com/mandiant/capa-rules/blob/627395d6f19dc76894bbf7d365d28d083fab67cf/lib/create-or-open-registry-key.yml#L4