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DITEKSHEN_MALWARE_Win_Quilclipper

Detects QuilClipper variants mostly in memory or extracted AutoIt script

MalwareQuilclipperditekSHen 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 QuilClipper variants mostly in memory or extracted AutoIt script

Associated malware family: Quilclipper.

It defines 11 patterns (11 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-quilclipper.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Quilclipper
{
	meta:
		description = "Detects QuilClipper variants mostly in memory or extracted AutoIt script"
		author = "ditekSHen"
		id = "bd23ec5a-f21a-5133-a77a-de2615933b82"
		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#L4076-L4094"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "dcac93806a438b188ae70a679301cb6630b9eb6849bf8fbbb1cea5fed5e7cf75"
		score = 75
		quality = 75
		tags = ""

	strings:
		$cnc1 = "QUILCLIPPER by" ascii
		$cnc2 = "/ UserName:" ascii
		$cnc3 = "/ System:" ascii
		$s1 = "DLLCALL ( \"kernel32.dll\" , \"handle\" , \"CreateMutexW\" , \"struct*\"" ascii
		$s2 = "SHELLEXECUTE ( @SCRIPTFULLPATH , \"\" , \"\" , FUNC_" ascii
		$s3 = "CASE BITROTATE" ascii
		$s4 = "CASE BITXOR" ascii
		$s5 = "CLIP( FUNC_" ascii
		$s6 = "CLIPPUT (" ascii
		$s7 = "FUNC _CLIPPUTFILE(" ascii
		$s8 = "HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Schedule" ascii

	condition:
		all of ( $cnc* ) or all of ( $s* )
}

Strings (11 patterns)

IdentifierTypeValueModifiers
$cnc1text"QUILCLIPPER by"ascii
$cnc2text"/ UserName:"ascii
$cnc3text"/ System:"ascii
$s1text"DLLCALL ( \"kernel32.dll\" , \"handle\" , \"CreateMutexW\" , \"struct*\""ascii
$s2text"SHELLEXECUTE ( @SCRIPTFULLPATH , \"\" , \"\" , FUNC_"ascii
$s3text"CASE BITROTATE"ascii
$s4text"CASE BITXOR"ascii
$s5text"CLIP( FUNC_"ascii
$s6text"CLIPPUT ("ascii
$s7text"FUNC _CLIPPUTFILE("ascii
$s8text"HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\Schedule"ascii

Condition

all of ( $cnc* ) or all of ( $s* )

In plain words (Heuristic)

  • All patterns in ( $cnc* ) must match.
  • All patterns in ( $s* ) 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: bd23ec5a-f21a-5133-a77a-de2615933b82

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