SEKOIA_Backdoor_Powershellempire_Gen

rule SEKOIA_Backdoor_Powershellempire_Gen : FILE
{
	meta:
		description = "Detects EmpirePowershell"
		author = "Sekoia.io"
		id = "36050a5b-bdca-45cd-8e26-7129fdcbf1e8"
		date = "2022-04-15"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_powershellempire_gen.yar#L1-L16"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "21f255bcfb6da2aa996ed61ff5fb29a9355de6169095f7c3141a1b7f3cea5c2d"
		score = 75
		quality = 76
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "%{$J=($J+$S[$_]+$K[$_%$K.COUNt])%256;" nocase wide ascii
		$ = "($IV+$K))|IEX" nocase wide ascii

	condition:
		all of them and filesize < 1MB
}