YARA · Google Cloud Threat Intelligence (GCTI)
GCTI_Cobaltstrike_Resources_Beacon_Dll_V1_49
Cobalt Strike's resources/beacon.dll Version 1.49
- Author
- gssincla@google.com
- Date
- 2022-11-18
- Modified
- 2023-12-04
- Score / Quality
- 75 / 85
What this rule detects
Cobalt Strike's resources/beacon.dll Version 1.49
Associated malware family: Cobalt Strike.
It defines 2 patterns (0 text, 2 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule GCTI_Cobaltstrike_Resources_Beacon_Dll_V1_49
{
meta:
= "Cobalt Strike's resources/beacon.dll Version 1.49"
= "gssincla@google.com"
= "871e28c9-b580-5a32-8529-2290ded1a1b6"
= "2022-11-18"
= "2023-12-04"
= "https://cloud.google.com/blog/products/identity-security/making-cobalt-strike-harder-for-threat-actors-to-abuse"
= "https://github.com/chronicle/GCTI/blob/1c5fd42b1895098527fde00c2d9757edf6b303bb/YARA/CobaltStrike/CobaltStrike__Resources_Beacon_Dll_All_Versions_MemEnabled.yara#L180-L211"
= "https://github.com/chronicle/GCTI/blob/1c5fd42b1895098527fde00c2d9757edf6b303bb/LICENSE"
= "52b4bd87e21ee0cbaaa0fc007fd3f894c5fc2c4bae5cbc2a37188de3c2c465fe"
= "935232d5ddccdc0401b4d911cdc73a48305347b495219c8c893615fe918f32f1"
= 75
= 85
= ""
strings:
$version_sig = { 48 56 83 F8 1E 0F 87 23 01 00 00 FF 24 }
$decoder = { B1 ?? 90 30 88 [4] 40 3D A8 01 00 00 7C F2 }
condition:
all of them
}
Strings (2 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $version_sig | hex | { 48 56 83 F8 1E 0F 87 23 01 00 00 FF 24 } | |
| $decoder | hex | { B1 ?? 90 30 88 [4] 40 3D A8 01 00 00 7C F2 } |
Condition
all of themIn plain words (Heuristic)
- All patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- 52b4bd87e21ee0cbaaa0fc007fd3f894c5fc2c4bae5cbc2a37188de3c2c465fe
Licence & attribution
Author: gssincla@google.com
Source repository: Google Cloud Threat Intelligence (GCTI) @ 1c5fd42b18
Licence: Apache License 2.0 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 871e28c9-b580-5a32-8529-2290ded1a1b6
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