SEKOIA_Koi_Netstealer

rule SEKOIA_Koi_Netstealer : FILE
{
	meta:
		description = "Detects NET ofbuscated Stealer used loaded by KoiLoader"
		author = "Sekoia.io"
		id = "deb06e2a-848c-44b3-be95-017ebccf11f8"
		date = "2024-03-20"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/koi_netstealer.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "814db1092820ff1ed9e592dc92c72ad73643eb6d68df9f593ed637434373e41b"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$name_1 = "pg20"
		$name_2 = "pg40"
		$s1 = "Curve25519"
		$s2 = "ConsoleApp"
		$s3 = "e0d2eec7-eb14-48ba-8709-dcc9de65947d"

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 150KB and any of ( $name_* ) and all of ( $s* )
}