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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_Winnti_MAL_Dec19_4

Detects Winnti malware

APT / threat actorWinntiSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Unknown
Date
2019-12-06
Modified
2025-08-11
Score / Quality
75 / 85

What this rule detects

Detects Winnti malware

Associated malware family: Winnti.

It defines 3 patterns (0 text, 3 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-winnti-mal-dec19-4.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_Winnti_MAL_Dec19_4
{
	meta:
		description = "Detects Winnti malware"
		author = "Unknown"
		id = "1f7ac215-d049-5b97-9797-9589a70cbf2b"
		date = "2019-12-06"
		modified = "2025-08-11"
		reference = "https://www.verfassungsschutz.de/download/broschuere-2019-12-bfv-cyber-brief-2019-01.pdf"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_winnti.yar#L226-L240"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "32909e915a6e602ad1e8698cf5c128c2e54670770b97f54b1414c5798c42cc00"
		score = 75
		quality = 85
		tags = ""

	strings:
		$b1 = { 4C 8D 41 24 33 D2 B9 03 00 1F 00 FF 9? F8 00 00 00 48 85 C0 74 }
		$b2 = { 4C 8B 4? 08 BA 01 00 00 00 49 8B C? FF D0 85 C0 [2-6] C7 4? 1C 01 00 00 00 B8 01 00 00 00 }
		$b3 = { 8B 4B E4 8B 53 EC 41 B8 00 40 00 00 4? 0B C? FF 9? B8 00 00 00 EB }

	condition:
		(2 of ( $b* ) )
}

Strings (3 patterns)

IdentifierTypeValueModifiers
$b1hex{ 4C 8D 41 24 33 D2 B9 03 00 1F 00 FF 9? F8 00 00 00 48 85 C0 74 }
$b2hex{ 4C 8B 4? 08 BA 01 00 00 00 49 8B C? FF D0 85 C0 [2-6] C7 4? 1C 01 00 00 00 B8 01 00 00 00 }
$b3hex{ 8B 4B E4 8B 53 EC 41 B8 00 40 00 00 4? 0B C? FF 9? B8 00 00 00 EB }

Condition

(2 of ( $b* ) )

In plain words (Heuristic)

  • At least 2 patterns in ( $b* ) must match.

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References

Licence & attribution

Author: Unknown

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: 1f7ac215-d049-5b97-9797-9589a70cbf2b

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