SEKOIA_Apt_Apt_K_47_Walkershell

rule SEKOIA_Apt_Apt_K_47_Walkershell : FILE
{
	meta:
		description = "Detects WalkerShell used by APT-K-47"
		author = "Sekoia.io"
		id = "201f8415-32d4-4af1-ba80-734554ced728"
		date = "2024-02-14"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_apt_k_47_walkershell.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "0dffd8e4d6c244a4faea0f8b8cda1e544a732ad9982e7963b21d5f71080f8f5d"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "\\n kuskure" ascii wide
		$s2 = "col.log.txt" ascii wide
		$s3 = "polor" ascii wide
		$s4 = "emit" ascii wide
		$s5 = "delta" ascii wide
		$s6 = "under process" ascii wide

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 4MB and all of them
}