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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_APT_NK_Andariel_Golang_Validalpha_Tasks

Detects a variant of the GoLang Validalpha malware

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
80 / 85

What this rule detects

Detects a variant of the GoLang Validalpha malware

Associated malware family: Validalpha.

It defines 4 patterns (4 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-apt-nk-andariel-golang-validalpha-tasks.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_APT_NK_Andariel_Golang_Validalpha_Tasks
{
	meta:
		description = "Detects a variant of the GoLang Validalpha malware"
		author = "CISA.gov"
		id = "caa67a79-3ea6-5910-971c-f311722570ff"
		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#L232-L247"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "0d3fb944888b289d345ffc8dfcc988abd04b8cabd1729a66e8236f95ee6147ee"
		score = 80
		quality = 85
		tags = ""

	strings:
		$ = "main.ScreenMonitThread"
		$ = "main.CmdShell"
		$ = "main.GetAllFoldersAndFiles"
		$ = "main.SelfDelete"

	condition:
		all of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$text"main.ScreenMonitThread"
$text"main.CmdShell"
$text"main.GetAllFoldersAndFiles"
$text"main.SelfDelete"

Condition

all of them

In plain words (Heuristic)

  • 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: caa67a79-3ea6-5910-971c-f311722570ff

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