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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Dllhijacker01

Hunt for VSNTAR21 / DllHijacker01 IronTiger / LuckyMouse / APT27 malware

MalwareDllhijacker01ditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 75

What this rule detects

Hunt for VSNTAR21 / DllHijacker01 IronTiger / LuckyMouse / APT27 malware

Associated malware family: Dllhijacker01.

Targets: Windows PE.

It defines 9 patterns (9 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

malware-win-dllhijacker01.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Dllhijacker01 : FILE
{
	meta:
		description = "Hunt for VSNTAR21 / DllHijacker01 IronTiger / LuckyMouse / APT27 malware"
		author = "ditekSHen"
		id = "0a858058-310a-5b1c-a6fe-abdec7b25abe"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L5432-L5448"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "48535c0bb5342e2f91ac9d015c761d8d543b122dd3cc08b7029631fcf3037bfb"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "libvlc_add_intf" fullword ascii
		$s2 = "libvlc_dllonexit" fullword ascii
		$s3 = "libvlc_getmainargs" fullword ascii
		$s4 = "libvlc_initenv" fullword ascii
		$s5 = "libvlc_set_app_id" fullword ascii
		$s6 = "libvlc_set_app_type" fullword ascii
		$s7 = "libvlc_set_user_agent" fullword ascii
		$s8 = "libvlc_wait" fullword ascii
		$s9 = "dll.dll" fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and 6 of them
}

Strings (9 patterns)

IdentifierTypeValueModifiers
$s1text"libvlc_add_intf"fullword ascii
$s2text"libvlc_dllonexit"fullword ascii
$s3text"libvlc_getmainargs"fullword ascii
$s4text"libvlc_initenv"fullword ascii
$s5text"libvlc_set_app_id"fullword ascii
$s6text"libvlc_set_app_type"fullword ascii
$s7text"libvlc_set_user_agent"fullword ascii
$s8text"libvlc_wait"fullword ascii
$s9text"dll.dll"fullword ascii

Condition

uint16( 0 ) == 0x5a4d and 6 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 6 patterns in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

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

Rule id: 0a858058-310a-5b1c-a6fe-abdec7b25abe

Tags:FILE