SEKOIA_Loader_Win_Purecrypter

rule SEKOIA_Loader_Win_Purecrypter : FILE
{
	meta:
		description = "Detect the PureCrypter loader"
		author = "Sekoia.io"
		id = "500b4d9e-55f8-41d1-ad4f-d587bbeb4507"
		date = "2022-09-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/loader_win_purecrypter.yar#L1-L16"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "5d0d733a4f8447d2d51656a20640fc9482581e19ba1d53fed7d98e85bb748763"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$hex01 = /http:\/\/[^\s]{5,90}_[A-Z][a-z]{7}\.(bmp|jpg|png)/ wide
		$hex02 = "WrapNonExceptionThrows" ascii

	condition:
		uint16( 0 ) == 0x5A4D and ( $hex02 in ( @hex01 .. @hex01 + 1000 ) or $hex01 in ( @hex02 .. @hex02 + 1000 ) )
}