DITEKSHEN_MALWARE_Win_Virlock

rule DITEKSHEN_MALWARE_Win_Virlock : FILE
{
	meta:
		description = "Detects VirLock ransomware"
		author = "ditekSHen"
		id = "dbf46963-3e74-54a0-8f7d-b24436c3ea2c"
		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#L8606-L8624"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "8d516a0d771d7134c0f917f010b3973ed53b4ee7e4a2cf0bb5daecf9867b0081"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = "BThere are two ways to pay a fine:" fullword wide
		$x2 = "^Es gibt zwei M" fullword wide
		$x3 = "glichkeiten, eine Strafe zahlen." fullword wide
		$x4 = /usertile\d+\.bmp/ fullword wide
		$s1 = "WinSock 2.0" fullword ascii
		$s2 = "Running" fullword ascii
		$s3 = "echo WScript.Sleep(50)>%TEMP%/file.vbs" fullword ascii
		$s4 = "cscript %TEMP%/file.vbs" fullword ascii
		$s5 = "del /F /Q file.js" fullword ascii
		$s6 = "del /F /Q %1" fullword ascii
		$s7 = "del /F /Q %0" fullword ascii

	condition:
		( uint16( 0 ) == 0x5a4d and ( ( 2 of ( $x* ) and 2 of ( $s* ) ) or ( 5 of ( $s* ) and 1 of ( $x* ) ) ) ) or ( 8 of them )
}