SEKOIA_Apt_Polonium_Deepcreep_Strings

rule SEKOIA_Apt_Polonium_Deepcreep_Strings : FILE
{
	meta:
		description = "Tries to detect POLONIUM's DeepCreep implant"
		author = "Sekoia.io"
		id = "b04af229-2bea-4ee8-9e17-8e4befa06e3a"
		date = "2022-10-12"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_polonium_deepcreep_strings.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "60724d2eb964e2c3681b72bdb732ca640b603af7dc94b4eb6608c77cddb94011"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = ";Invoke-Expression -Command '$shortcut =" ascii wide
		$ = "CreateShortcut($c1" ascii wide
		$ = "svchostdp.exe" ascii wide
		$ = "HNlIC91IA==" ascii wide

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 3MB and 3 of them
}