SEKOIA_Koiloader_Lnk

rule SEKOIA_Koiloader_Lnk : FILE
{
	meta:
		description = "LNK file leading to deploy KoiLoader"
		author = "Sekoia.io"
		id = "e82975b9-94b7-4de8-8cd5-d594aa80cf02"
		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/koiloader_lnk.yar#L1-L18"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "49953c76796f671ed80afa21872aac500d706f2af4426a5ec2854e16b9d0e474"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "bat & schtasks /create" wide
		$s2 = "/sc minute /mo 1" wide
		$s3 = "c3RhcnQgL21pbiBwb3dlcnNoZWxsIC1jb21tYW5kICJJV1IgLVVzZUJhc2ljUGFyc2luZyAnaHR0cHM6" wide
		$s4 = " & certutil -f -decode " wide

	condition:
		uint32( 0 ) == 0x0000004c and all of them
}