SEKOIA_Apt_Mustangpanda_Windows_Shellcode_Decryptionalgorithm

rule SEKOIA_Apt_Mustangpanda_Windows_Shellcode_Decryptionalgorithm : FILE
{
	meta:
		description = "Decryption routine for Shellcode of MustangPanda"
		author = "Sekoia.io"
		id = "c9873a5f-97a6-477f-a1a0-650441c73444"
		date = "2022-12-05"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_mustangpanda_windows_shellcode_decryptionalgorithm.yar#L1-L28"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "a2ad3bd4dcbee3e23762b674ee8b6717e7ece712b0128145518bfa5d2e4bd66a"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$chunk_1 = {
        7E ??
        8B 55 ??
        53
        56
        8B 75 ??
        57
        8B 7D ??
        4F
        8D A4 24 ?? ?? ?? ??
        8A 1C 11
        30 1C 30
        }

	condition:
		filesize < 8MB and all of them
}