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6 Commits

Author SHA1 Message Date
Mike Hunhoff
7a66dfc025 update CHANGELOG 2025-02-19 15:43:07 -07:00
Mike Hunhoff
f5db5fd5cf be2: improve number extraction 2025-02-19 15:38:42 -07:00
dependabot[bot]
9a270e6bdd build(deps): bump pyinstaller from 6.11.1 to 6.12.0 (#2602)
Bumps [pyinstaller](https://github.com/pyinstaller/pyinstaller) from 6.11.1 to 6.12.0.
- [Release notes](https://github.com/pyinstaller/pyinstaller/releases)
- [Changelog](https://github.com/pyinstaller/pyinstaller/blob/develop/doc/CHANGES.rst)
- [Commits](https://github.com/pyinstaller/pyinstaller/compare/v6.11.1...v6.12.0)

---
updated-dependencies:
- dependency-name: pyinstaller
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Mike Hunhoff <mike.hunhoff@gmail.com>
2025-02-19 20:35:07 +01:00
dependabot[bot]
8773bc77ab build(deps): bump mypy from 1.14.1 to 1.15.0 (#2601)
Bumps [mypy](https://github.com/python/mypy) from 1.14.1 to 1.15.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](https://github.com/python/mypy/compare/v1.14.1...v1.15.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Mike Hunhoff <mike.hunhoff@gmail.com>
2025-02-19 20:34:51 +01:00
Mike Hunhoff
a278bf593a cape: models: parse minimum fields required for analysis (#2607)
* cape: models: parse minimum fields required for analysis

* update CHANGELOG
2025-02-19 08:55:12 -07:00
Capa Bot
f85cd80d90 Sync capa rules submodule 2025-02-11 09:25:04 +00:00
5 changed files with 133 additions and 141 deletions

View File

@@ -11,6 +11,8 @@
-
### Bug Fixes
- only parse CAPE fields required for analysis @mike-hunhoff #2607
- improve _number_ feature extraction for BinExport @mike-hunhoff #2609
### capa Explorer Web

View File

@@ -349,30 +349,9 @@ def get_operand_register_expression(be2: BinExport2, operand: BinExport2.Operand
def get_operand_immediate_expression(be2: BinExport2, operand: BinExport2.Operand) -> Optional[BinExport2.Expression]:
if len(operand.expression_index) == 1:
# - type: IMMEDIATE_INT
# immediate: 20588728364
# parent_index: 0
expression: BinExport2.Expression = be2.expression[operand.expression_index[0]]
for expression in get_operand_expressions(be2, operand):
if expression.type == BinExport2.Expression.IMMEDIATE_INT:
return expression
elif len(operand.expression_index) == 2:
# from IDA, which provides a size hint for every operand,
# we get the following pattern for immediate constants:
#
# - type: SIZE_PREFIX
# symbol: "b8"
# - type: IMMEDIATE_INT
# immediate: 20588728364
# parent_index: 0
expression0: BinExport2.Expression = be2.expression[operand.expression_index[0]]
expression1: BinExport2.Expression = be2.expression[operand.expression_index[1]]
if expression0.type == BinExport2.Expression.SIZE_PREFIX:
if expression1.type == BinExport2.Expression.IMMEDIATE_INT:
return expression1
return None

View File

@@ -12,7 +12,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Any, Union, Literal, Optional, Annotated, TypeAlias
from typing import Any, Union, Optional, Annotated, TypeAlias
from pydantic import Field, BaseModel, ConfigDict
from pydantic.functional_validators import BeforeValidator
@@ -75,34 +75,37 @@ class Info(FlexibleModel):
version: str
class ImportedSymbol(ExactModel):
class ImportedSymbol(FlexibleModel):
address: HexInt
name: Optional[str] = None
class ImportedDll(ExactModel):
class ImportedDll(FlexibleModel):
dll: str
imports: list[ImportedSymbol]
class DirectoryEntry(ExactModel):
"""
class DirectoryEntry(FlexibleModel):
name: str
virtual_address: HexInt
size: HexInt
"""
class Section(ExactModel):
class Section(FlexibleModel):
name: str
raw_address: HexInt
# raw_address: HexInt
virtual_address: HexInt
virtual_size: HexInt
size_of_data: HexInt
characteristics: str
characteristics_raw: HexInt
entropy: float
# virtual_size: HexInt
# size_of_data: HexInt
# characteristics: str
# characteristics_raw: HexInt
# entropy: float
class Resource(ExactModel):
"""
class Resource(FlexibleModel):
name: str
language: Optional[str] = None
sublanguage: str
@@ -140,7 +143,7 @@ class DigitalSigner(FlexibleModel):
extensions_subjectKeyIdentifier: Optional[str] = None
class AuxSigner(ExactModel):
class AuxSigner(FlexibleModel):
name: str
issued_to: str = Field(alias="Issued to")
issued_by: str = Field(alias="Issued by")
@@ -148,7 +151,7 @@ class AuxSigner(ExactModel):
sha1_hash: str = Field(alias="SHA1 hash")
class Signer(ExactModel):
class Signer(FlexibleModel):
aux_sha1: Optional[str] = None
aux_timestamp: Optional[str] = None
aux_valid: Optional[bool] = None
@@ -157,60 +160,61 @@ class Signer(ExactModel):
aux_signers: Optional[list[AuxSigner]] = None
class Overlay(ExactModel):
class Overlay(FlexibleModel):
offset: HexInt
size: HexInt
class KV(ExactModel):
class KV(FlexibleModel):
name: str
value: str
"""
class ExportedSymbol(ExactModel):
class ExportedSymbol(FlexibleModel):
address: HexInt
name: str
ordinal: int
# ordinal: int
class PE(ExactModel):
peid_signatures: TODO
class PE(FlexibleModel):
# peid_signatures: TODO
imagebase: HexInt
entrypoint: HexInt
reported_checksum: HexInt
actual_checksum: HexInt
osversion: str
pdbpath: Optional[str] = None
timestamp: str
# entrypoint: HexInt
# reported_checksum: HexInt
# actual_checksum: HexInt
# osversion: str
# pdbpath: Optional[str] = None
# timestamp: str
# list[ImportedDll], or dict[basename(dll), ImportedDll]
imports: Union[list[ImportedDll], dict[str, ImportedDll]]
imported_dll_count: Optional[int] = None
imphash: str
# imported_dll_count: Optional[int] = None
# imphash: str
exported_dll_name: Optional[str] = None
# exported_dll_name: Optional[str] = None
exports: list[ExportedSymbol]
dirents: list[DirectoryEntry]
# dirents: list[DirectoryEntry]
sections: list[Section]
ep_bytes: Optional[HexBytes] = None
# ep_bytes: Optional[HexBytes] = None
overlay: Optional[Overlay] = None
resources: list[Resource]
versioninfo: list[KV]
# overlay: Optional[Overlay] = None
# resources: list[Resource]
# versioninfo: list[KV]
# base64 encoded data
icon: Optional[str] = None
# icon: Optional[str] = None
# MD5-like hash
icon_hash: Optional[str] = None
# icon_hash: Optional[str] = None
# MD5-like hash
icon_fuzzy: Optional[str] = None
# icon_fuzzy: Optional[str] = None
# short hex string
icon_dhash: Optional[str] = None
# icon_dhash: Optional[str] = None
digital_signers: list[DigitalSigner]
guest_signers: Signer
# digital_signers: list[DigitalSigner]
# guest_signers: Signer
# TODO(mr-tz): target.file.dotnet, target.file.extracted_files, target.file.extracted_files_tool,
@@ -218,48 +222,49 @@ class PE(ExactModel):
# https://github.com/mandiant/capa/issues/1814
class File(FlexibleModel):
type: str
cape_type_code: Optional[int] = None
cape_type: Optional[str] = None
# cape_type_code: Optional[int] = None
# cape_type: Optional[str] = None
pid: Optional[Union[int, Literal[""]]] = None
name: Union[list[str], str]
path: str
guest_paths: Union[list[str], str, None]
timestamp: Optional[str] = None
# pid: Optional[Union[int, Literal[""]]] = None
# name: Union[list[str], str]
# path: str
# guest_paths: Union[list[str], str, None]
# timestamp: Optional[str] = None
#
# hashes
#
crc32: str
# crc32: str
md5: str
sha1: str
sha256: str
sha512: str
sha3_384: Optional[str] = None
ssdeep: str
# sha512: str
# sha3_384: Optional[str] = None
# ssdeep: str
# unsure why this would ever be "False"
tlsh: Optional[Union[str, bool]] = None
rh_hash: Optional[str] = None
# tlsh: Optional[Union[str, bool]] = None
# rh_hash: Optional[str] = None
#
# other metadata, static analysis
#
size: int
# size: int
pe: Optional[PE] = None
ep_bytes: Optional[HexBytes] = None
entrypoint: Optional[int] = None
data: Optional[str] = None
strings: Optional[list[str]] = None
# ep_bytes: Optional[HexBytes] = None
# entrypoint: Optional[int] = None
# data: Optional[str] = None
# strings: Optional[list[str]] = None
#
# detections (skip)
#
yara: Skip = None
cape_yara: Skip = None
clamav: Skip = None
virustotal: Skip = None
# yara: Skip = None
# cape_yara: Skip = None
# clamav: Skip = None
# virustotal: Skip = None
"""
class ProcessFile(File):
#
# like a File, but also has dynamic analysis results
@@ -272,35 +277,36 @@ class ProcessFile(File):
target_pid: Optional[Union[int, str]] = None
target_path: Optional[str] = None
target_process: Optional[str] = None
"""
class Argument(ExactModel):
class Argument(FlexibleModel):
name: str
# unsure why empty list is provided here
value: Union[HexInt, int, str, EmptyList]
pretty_value: Optional[str] = None
class Call(ExactModel):
timestamp: str
class Call(FlexibleModel):
# timestamp: str
thread_id: int
category: str
# category: str
api: str
arguments: list[Argument]
status: bool
# status: bool
return_: HexInt = Field(alias="return")
pretty_return: Optional[str] = None
repeated: int
# repeated: int
# virtual addresses
caller: HexInt
parentcaller: HexInt
# caller: HexInt
# parentcaller: HexInt
# index into calls array
id: int
# id: int
# FlexibleModel to account for extended fields
@@ -310,14 +316,15 @@ class Process(FlexibleModel):
process_id: int
process_name: str
parent_id: int
module_path: str
first_seen: str
# module_path: str
# first_seen: str
calls: list[Call]
threads: list[int]
environ: dict[str, str]
class ProcessTree(ExactModel):
"""
class ProcessTree(FlexibleModel):
name: str
pid: int
parent_id: int
@@ -325,17 +332,18 @@ class ProcessTree(ExactModel):
threads: list[int]
environ: dict[str, str]
children: list["ProcessTree"]
"""
class Summary(ExactModel):
class Summary(FlexibleModel):
files: list[str]
read_files: list[str]
write_files: list[str]
delete_files: list[str]
# read_files: list[str]
# write_files: list[str]
# delete_files: list[str]
keys: list[str]
read_keys: list[str]
write_keys: list[str]
delete_keys: list[str]
# read_keys: list[str]
# write_keys: list[str]
# delete_keys: list[str]
executed_commands: list[str]
resolved_apis: list[str]
mutexes: list[str]
@@ -343,7 +351,8 @@ class Summary(ExactModel):
started_services: list[str]
class EncryptedBuffer(ExactModel):
"""
class EncryptedBuffer(FlexibleModel):
process_name: str
pid: int
@@ -351,38 +360,41 @@ class EncryptedBuffer(ExactModel):
buffer: str
buffer_size: Optional[int] = None
crypt_key: Optional[Union[HexInt, str]] = None
"""
class Behavior(ExactModel):
class Behavior(FlexibleModel):
summary: Summary
# list of processes, of threads, of calls
processes: list[Process]
# tree of processes
processtree: list[ProcessTree]
# processtree: list[ProcessTree]
anomaly: list[str]
encryptedbuffers: list[EncryptedBuffer]
# anomaly: list[str]
# encryptedbuffers: list[EncryptedBuffer]
# these are small objects that describe atomic events,
# like file move, registry access.
# we'll detect the same with our API call analysis.
enhanced: Skip = None
# enhanced: Skip = None
class Target(ExactModel):
category: str
class Target(FlexibleModel):
# category: str
file: File
# pe: Optional[PE] = None
class Static(FlexibleModel):
pe: Optional[PE] = None
# flare_capa: Skip = None
class Static(ExactModel):
pe: Optional[PE] = None
flare_capa: Skip = None
class Cape(ExactModel):
"""
class Cape(FlexibleModel):
payloads: list[ProcessFile]
configs: Skip = None
"""
# flexible because there may be more sorts of analysis
@@ -405,15 +417,14 @@ class CapeReport(FlexibleModel):
# post-processed results: process tree, anomalies, etc
behavior: Behavior
# post-processed results: payloads and extracted configs
CAPE: Optional[Union[Cape, list]] = None
dropped: Optional[list[File]] = None
procdump: Optional[list[ProcessFile]] = None
procmemory: Optional[ListTODO] = None
# =========================================================================
# information we won't use in capa
#
# post-processed results: payloads and extracted configs
# CAPE: Optional[Union[Cape, list]] = None
# dropped: Optional[list[File]] = None
# procdump: Optional[list[ProcessFile]] = None
# procmemory: Optional[ListTODO] = None
#
# NBIs and HBIs
@@ -422,32 +433,32 @@ class CapeReport(FlexibleModel):
#
# if we come up with a future use for this, go ahead and re-enable!
#
network: Skip = None
suricata: Skip = None
curtain: Skip = None
sysmon: Skip = None
url_analysis: Skip = None
# network: Skip = None
# suricata: Skip = None
# curtain: Skip = None
# sysmon: Skip = None
# url_analysis: Skip = None
# screenshot hash values
deduplicated_shots: Skip = None
# deduplicated_shots: Skip = None
# k-v pairs describing the time it took to run each stage.
statistics: Skip = None
# statistics: Skip = None
# k-v pairs of ATT&CK ID to signature name or similar.
ttps: Skip = None
# ttps: Skip = None
# debug log messages
debug: Skip = None
# debug: Skip = None
# various signature matches
# we could potentially extend capa to use this info one day,
# though it would be quite sandbox-specific,
# and more detection-oriented than capability detection.
signatures: Skip = None
malfamily_tag: Optional[str] = None
malscore: float
detections: Skip = None
detections2pid: Optional[dict[int, list[str]]] = None
# signatures: Skip = None
# malfamily_tag: Optional[str] = None
# malscore: float
# detections: Skip = None
# detections2pid: Optional[dict[int, list[str]]] = None
# AV detections for the sample.
virustotal: Skip = None
# virustotal: Skip = None
@classmethod
def from_buf(cls, buf: bytes) -> "CapeReport":

View File

@@ -139,7 +139,7 @@ dev = [
"ruff==0.9.2",
"black==25.1.0",
"isort==6.0.0",
"mypy==1.14.1",
"mypy==1.15.0",
"mypy-protobuf==3.6.0",
"PyGithub==2.5.0",
# type stubs for mypy
@@ -156,7 +156,7 @@ build = [
# we want all developer environments to be consistent.
# These dependencies are not used in production environments
# and should not conflict with other libraries/tooling.
"pyinstaller==6.11.1",
"pyinstaller==6.12.0",
"setuptools==75.8.0",
"build==1.2.2"
]

2
rules

Submodule rules updated: 79afc557f1...c0aa922f20