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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_APT_NK_Andariel_Golang_Validalpha_Blackstring

Detects a variant of the GoLang Validalpha malware based on a file path found in the samples

MalwareValidalphaSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
CISA.gov
Date
2024-07-25
Modified
2026-01-29
Score / Quality
90 / 85

What this rule detects

Detects a variant of the GoLang Validalpha malware based on a file path found in the samples

Associated malware family: Validalpha.

Targets: Windows PE.

It defines 1 patterns (1 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-apt-nk-andariel-golang-validalpha-blackstring.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_APT_NK_Andariel_Golang_Validalpha_Blackstring : FILE
{
	meta:
		description = "Detects a variant of the GoLang Validalpha malware based on a file path found in the samples"
		author = "CISA.gov"
		id = "36f46a1d-69b6-5c99-9a54-6a14d62d2721"
		date = "2024-07-25"
		modified = "2026-01-29"
		reference = "https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-207a"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_nk_andariel_jul24.yar#L249-L261"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "07ea38890e99dd53437a23b7c4002851604b69a83bd7fb8971609226249e5954"
		score = 90
		quality = 85
		tags = "FILE"

	strings:
		$ = "I:/01___Tools/02__RAT/Black"

	condition:
		uint16( 0 ) == 0x5A4D and all of them
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$text"I:/01___Tools/02__RAT/Black"

Condition

uint16( 0 ) == 0x5A4D and all of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • All patterns in the rule must match.

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References

Licence & attribution

Author: CISA.gov

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 36f46a1d-69b6-5c99-9a54-6a14d62d2721

Tags:FILE

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