SEKOIA_Apt_Muddywater_Manifestation_Backdoor_Obfuscated

rule SEKOIA_Apt_Muddywater_Manifestation_Backdoor_Obfuscated : FILE
{
	meta:
		description = "Detects obfuscated Muddys manifestation JScript backdoor"
		author = "Sekoia.io"
		id = "58df72a1-822c-4b82-904d-1c0124dc7bc1"
		date = "2022-01-13"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_muddywater_manifestation_backdoor_obfuscated.yar#L1-L17"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "8610f0895fafd2bc9a19bbff816754b563565ba6b105cc3d0a32b80bf5ebdc47"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$m = { 76 61 72 20 5f 30 78 [4-6] 3d 5b }
		$w = {57 53 63 72 69 70 74 5b 5f 30 78 [4-6] 28 30 78 [2-3] 29 5d 28 30 78 [2-3] 2a 30 78 [2-3] 29 2c }
		$t = "subkeys(key));}"

	condition:
		$m at 0 and ( $t at ( filesize -16 ) or $w in ( filesize -200 .. filesize ) )
}