DITEKSHEN_MALWARE_Win_Cratpluginkeylogger

rule DITEKSHEN_MALWARE_Win_Cratpluginkeylogger : FILE
{
	meta:
		description = "Detects CRAT keylogger plugin DLL"
		author = "ditekSHen"
		id = "a8682786-7704-56f0-a6df-b4e2ab4d7536"
		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#L1946-L1962"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "58ef1f7466fcc871be2e74aa447c76970fd90c9d9d345a896fb8e6335114d189"
		score = 75
		quality = 75
		tags = "FILE"
		clamav_sig = "MALWARE.Win.Trojan.CRAT"

	strings:
		$ai1 = "VM detected!" fullword wide
		$ai2 = "Sandbox detected!" fullword wide
		$ai3 = "Debug detected!" fullword wide
		$ai4 = "Analysis process detected!" fullword wide
		$s1 = "Create KeyLogMutex %s failure %d" wide
		$s2 = "Key Log Mutex already created! %s" wide
		$s3 = /KeyLogThread\s(started|finished|terminated)!/ wide
		$s4 = /KeyLog_(x64|x32|Win64|Win32)_DllRelease\.dll/ fullword ascii

	condition:
		uint16( 0 ) == 0x5a4d and ( ( all of ( $ai* ) and 1 of ( $s* ) ) or ( 3 of ( $s* ) and 1 of ( $ai* ) ) or 5 of them )
}