YARA · Google Cloud Threat Intelligence (GCTI)
GCTI_Cobaltstrike_Resources_Beacon_Dll_V3_13
Cobalt Strike's resources/beacon.dll Versions 3.13
- 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 Versions 3.13
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_V3_13
{
meta:
= "Cobalt Strike's resources/beacon.dll Versions 3.13"
= "gssincla@google.com"
= "98dd32e6-9bb5-57b2-a5e5-1c74a0d1e6d3"
= "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#L806-L836"
= "https://github.com/chronicle/GCTI/blob/1c5fd42b1895098527fde00c2d9757edf6b303bb/LICENSE"
= "362119e3bce42e91cba662ea80f1a7957a5c2b1e92075a28352542f31ac46a0c"
= "adafac8692ad676b0168b3e829bc7948db72953b95c79d483ae1a05f1d4f9b2b"
= 75
= 85
= ""
strings:
$version_sig = { 4A 56 57 83 FA 5A 0F 87 2D 03 00 00 FF 24 }
$decoder = { 80 B0 [4] ?? 40 3D 00 10 00 00 7C F1 }
condition:
all of them
}
Strings (2 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $version_sig | hex | { 4A 56 57 83 FA 5A 0F 87 2D 03 00 00 FF 24 } | |
| $decoder | hex | { 80 B0 [4] ?? 40 3D 00 10 00 00 7C F1 } |
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).
- 362119e3bce42e91cba662ea80f1a7957a5c2b1e92075a28352542f31ac46a0c
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: 98dd32e6-9bb5-57b2-a5e5-1c74a0d1e6d3
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