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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Dllloader

Detects unknown DLL Loader

MalwareDllloaderditekSHen 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

Detects unknown DLL Loader

Associated malware family: Dllloader.

Targets: Windows PE.

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-dllloader.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Dllloader : FILE
{
	meta:
		description = "Detects unknown DLL Loader"
		author = "ditekSHen"
		id = "164967b8-d0f5-543d-82ac-bb2465b85c2a"
		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#L4228-L4239"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "aaf1ff0f93d1fe6cf189c9f30403c226e64146178150dff8dfd3a9e3ed84bcc2"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$s1 = "LondLibruryA" fullword ascii
		$s2 = "LdrLoadDll" fullword ascii
		$s3 = "snxhk.dll" fullword ascii
		$s4 = "DisableThreadLibraryCalls" fullword ascii

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

Strings (4 patterns)

IdentifierTypeValueModifiers
$s1text"LondLibruryA"fullword ascii
$s2text"LdrLoadDll"fullword ascii
$s3text"snxhk.dll"fullword ascii
$s4text"DisableThreadLibraryCalls"fullword ascii

Condition

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

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • All 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: 164967b8-d0f5-543d-82ac-bb2465b85c2a

Tags:FILE

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