DITEKSHEN_MALWARE_Win_Umbralstealer

rule DITEKSHEN_MALWARE_Win_Umbralstealer : FILE
{
	meta:
		description = "Detects Umbral infostealer"
		author = "ditekShen"
		id = "695a350b-3d8e-5244-a275-a60202a8e956"
		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#L11377-L11398"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "1686e4626e4d6335f028d6cb6471c32dac747a77fc95d97b4c9dfd043ba975e9"
		score = 75
		quality = 75
		tags = "FILE"

	strings:
		$x1 = "Umbral Stealer" wide
		$x2 = "Umbral.payload." ascii
		$s1 = "U2V0LU1wUHJlZmVyZW5jZ" wide
		$s2 = "{{ Key = {0}, Value = {1} }}" wide
		$s3 = "csproduct get uuid" wide
		$s4 = "0.0.0.0 www."
		$s5 = /(set|get)_Take(Screen|WebcamSnap)shot/ fullword ascii
		$s6 = "still_pin" fullword ascii
		$c1 = "kaspersky.com" wide
		$c2 = "bitdefender.com" wide
		$c3 = "virustotal.com" wide
		$c4 = "malwarebytes.com" wide
		$c5 = "clamav.net" wide
		$c6 = "trendmicro.com" wide

	condition:
		uint16( 0 ) == 0x5a4d and ( 1 of ( $x* ) or 5 of ( $s* ) or ( 3 of ( $s* ) and 4 of ( $c* ) ) )
}