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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_Winnti_MAL_Dec19_3

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 5 patterns (0 text, 5 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-winnti-mal-dec19-3.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_Winnti_MAL_Dec19_3
{
	meta:
		description = "Detects Winnti malware"
		author = "Unknown"
		id = "2e001c91-0794-5940-ad8c-8e58a01e100c"
		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#L208-L224"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "601f8a3cba57fea46c16c36f8276631fcd22feef4ea1388a1ea35b00929b9fbb"
		score = 75
		quality = 85
		tags = ""

	strings:
		$b1 = { 0F B7 ?? 16 [0-1] (81 E? | 25) 00 20 [8-10] 8B ?? 50 41 B9 40 00 00 00 41 B8 00 10 00 00 }
		$b2 = { 8B 40 28 [5-8] 48 03 C8 48 8B C1 [5-8] 48 89 41 28 }
		$b3 = { 48 6B ?? 28 [5-8] 8B ?? ?? 10 [5-8] 48 6B ?? 28 [5-8] 8B ?? ?? 14 }
		$b4 = { 83 B? 90 00 00 00 00 0F 84 [9-12] 83 B? 94 00 00 00 00 0F 84 }
		$b5 = { (45 | 4D) (31 | 33) C0 BA 01 00 00 00 [10-16] FF 5? 28 [0-1] (84 | 85) C0 }

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

Strings (5 patterns)

IdentifierTypeValueModifiers
$b1hex{ 0F B7 ?? 16 [0-1] (81 E? | 25) 00 20 [8-10] 8B ?? 50 41 B9 40 00 00 00 41 B8 00 10 00 00 }
$b2hex{ 8B 40 28 [5-8] 48 03 C8 48 8B C1 [5-8] 48 89 41 28 }
$b3hex{ 48 6B ?? 28 [5-8] 8B ?? ?? 10 [5-8] 48 6B ?? 28 [5-8] 8B ?? ?? 14 }
$b4hex{ 83 B? 90 00 00 00 00 0F 84 [9-12] 83 B? 94 00 00 00 00 0F 84 }
$b5hex{ (45 | 4D) (31 | 33) C0 BA 01 00 00 00 [10-16] FF 5? 28 [0-1] (84 | 85) C0 }

Condition

(4 of ( $b* ) )

In plain words (Heuristic)

  • At least 4 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: 2e001c91-0794-5940-ad8c-8e58a01e100c

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