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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_APT_Winnti_MAL_Dec19_5

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 16 patterns (15 text, 1 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-winnti-mal-dec19-5.yarDetection Rule License 1.1
rule SIGNATURE_BASE_APT_Winnti_MAL_Dec19_5
{
	meta:
		description = "Detects Winnti malware"
		author = "Unknown"
		id = "2a8f28e6-5a01-5a2f-b89b-9c34163afcda"
		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#L242-L269"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "977d11fbb7cf4678d4da179c43d5566520ee97ac528e269a9b985e5bc75641b7"
		score = 75
		quality = 85
		tags = ""

	strings:
		$a1 = "-k netsvcs" ascii
		$a2 = "svchost.exe" ascii fullword
		$a3 = "%SystemRoot%\\System32\\ntoskrnl.exe" ascii
		$a4 = "Global\\BFE_Notify_Event_{65a097fe-6102-446a-9f9c-55dfc3f411015}" ascii
		$a5 = "Global\\BFE_Notify_Event_{65a097fe-6102-446a-9f9c-55dfc3f411014}" ascii
		$a6 = "Global\\BFE_Notify_Event_{65a097fe-6102-446a-9f9c-55dfc3f411016}" ascii
		$a7 = "cmd.exe" wide
		$a8 = ",XML" wide
		$a9 = "\\rundll32.exe" wide
		$a10 = "\\conhost.exe" wide
		$a11 = "\\cmd.exe" wide
		$a12 = "NtQueryInformationProcess" ascii
		$a13 = "Detours!" ascii fullword
		$a14 = "Loading modified build of detours library designed for MPC-HC player (http://sourceforge.net/projects/mpc-hc/)" ascii
		$a15 = "CONOUT$" wide fullword
		$a16 = { C6 0? E9 4? 8? 4? 05 [2] 89 4? 01 }

	condition:
		(12 of ( $a* ) )
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$a1text"-k netsvcs"ascii
$a2text"svchost.exe"ascii fullword
$a3text"%SystemRoot%\\System32\\ntoskrnl.exe"ascii
$a4text"Global\\BFE_Notify_Event_{65a097fe-6102-446a-9f9c-55dfc3f411015}"ascii
$a5text"Global\\BFE_Notify_Event_{65a097fe-6102-446a-9f9c-55dfc3f411014}"ascii
$a6text"Global\\BFE_Notify_Event_{65a097fe-6102-446a-9f9c-55dfc3f411016}"ascii
$a7text"cmd.exe"wide
$a8text",XML"wide
$a9text"\\rundll32.exe"wide
$a10text"\\conhost.exe"wide
$a11text"\\cmd.exe"wide
$a12text"NtQueryInformationProcess"ascii
$a13text"Detours!"ascii fullword
$a14text"Loading modified build of detours library designed for MPC-HC player (http://sourceforge.net/projects/mpc-hc/)"ascii
$a15text"CONOUT$"wide fullword
$a16hex{ C6 0? E9 4? 8? 4? 05 [2] 89 4? 01 }

Condition

(12 of ( $a* ) )

In plain words (Heuristic)

  • At least 12 patterns in ( $a* ) 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: 2a8f28e6-5a01-5a2f-b89b-9c34163afcda

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