mirror of
https://github.com/mandiant/capa-rules
synced 2026-06-08 15:41:20 +00:00
Mike Hunhoff
75c16e4b14
* remove redundant matches for dynamic scope * fix lints * fix lints * tighten scopes
29 lines
989 B
YAML
29 lines
989 B
YAML
rule:
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meta:
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name: encrypt data using RC4 via SystemFunction033
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namespace: data-manipulation/encryption/rc4
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authors:
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- daniel.stepanic@elastic.co
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scopes:
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static: function
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dynamic: call
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att&ck:
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- Defense Evasion::Obfuscated Files or Information [T1027]
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mbc:
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- Defense Evasion::Obfuscated Files or Information::Encryption-Standard Algorithm [E1027.m05]
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- Cryptography::Encrypt Data::RC4 [C0027.009]
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references:
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- https://www.redteam.cafe/red-team/shellcode-injection/inmemory-shellcode-encryption-and-decryption-using-systemfunction033
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examples:
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- 0f33c2fec223823f84a732ceb1ad94ed2645e896095144850cf1443aeda67da6:0x180001000 # api match
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features:
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- or:
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- api: SystemFunction033
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- basic block:
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- and:
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- match: link function at runtime on Windows
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- string: "SystemFunction033"
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- optional:
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- string: /advapi32/i
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- string: /cryptsp/i
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