YARA · ditekSHen detection

DITEKSHEN_INDICATOR_KB_Gobuildid_Goldenaxe

Detects Golang Build IDs in known bad samples

Suspicious / huntingGoldenaxeditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X

Author: ditekSHen
Date: 2021-01-21
Modified: 2024-01-23
Score / Quality: 75 / 75

What this rule detects

Detects Golang Build IDs in known bad samples

Associated malware family: Goldenaxe.

Targets: Windows PE.

It defines 2 patterns (2 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

indicator-kb-gobuildid-goldenaxe.yarBSD 2-Clause License

rule DITEKSHEN_INDICATOR_KB_Gobuildid_Goldenaxe : FILE
{
	meta:
		description = "Detects Golang Build IDs in known bad samples"
		author = "ditekSHen"
		id = "e734d5b4-2332-5b46-a05e-fb35134ea070"
		date = "2021-01-21"
		modified = "2024-01-23"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/indicator_knownbad_id.yar#L1564-L1573"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "4ab9aeaa74530de4a62ddfa8d7e8607e455d0ba4330260037327bec6d8d7abab"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "Go build ID: \"BrJuyMRdiZ7pC9Cah0is/rbDB__hXWimivbSGiCLi/B35SPLQwHal3ccR2gXNx/hEmVzhJWWatsrKwnENh_\"" ascii
		$s2 = "Go build ID: \"5bgieaBe9PcZCZf23WFp/bCZ0AUHYlqQmX8GJASV6/fGxRLMDDYrTm1jcLMt8j/Wof3n5634bwiwLHFKHTn\"" ascii

	condition:
		uint16( 0 ) == 0x5a4d and filesize < 8000KB and 1 of them
}

Strings (2 patterns)

Identifier	Type	Value	Modifiers
$s1	text	"Go build ID: \"BrJuyMRdiZ7pC9Cah0is/rbDB__hXWimivbSGiCLi/B35SPLQwHal3ccR2gXNx/hEmVzhJWWatsrKwnENh_\""	ascii
$s2	text	"Go build ID: \"5bgieaBe9PcZCZf23WFp/bCZ0AUHYlqQmX8GJASV6/fGxRLMDDYrTm1jcLMt8j/Wof3n5634bwiwLHFKHTn\""	ascii

Condition

uint16( 0 ) == 0x5a4d and filesize < 8000KB and 1 of them

In plain words (Heuristic)

The file must start with “MZ” — a Windows executable (PE).
The file must be smaller than 8000KB (a cheap guard that skips large files).
At least 1 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.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

https://github.com/ditekshen/detection

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: e734d5b4-2332-5b46-a05e-fb35134ea070

Tags:FILE

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