CAPE_Lumma

rule CAPE_Lumma : FILE
{
	meta:
		description = "Lumma Payload"
		author = "kevoreilly"
		id = "66cb8b1a-e27e-5008-8f52-0e52e6624057"
		date = "2024-01-05"
		modified = "2025-07-08"
		reference = "https://github.com/kevoreilly/CAPEv2"
		source_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/data/yara/CAPE/Lumma.yar#L1-L16"
		license_url = "https://github.com/kevoreilly/CAPEv2/blob/6b15e76f28cd83fd1187da6c9aaaad2174255356/LICENSE"
		logic_hash = "ca7822292c58af68e7a1610362bf0b5d27c93e3222ceec8d216e05a442008f37"
		score = 75
		quality = 70
		tags = "FILE"
		cape_type = "Lumma Payload"
		packed = "0ee580f0127b821f4f1e7c032cf76475df9724a9fade2e153a69849f652045f8"
		packed = "23ff1c20b16d9afaf1ce443784fc9a025434a010e2194de9dec041788c369887"

	strings:
		$decode1 = {C1 (E9|EA) 02 [0-3] 0F B6 (44|4C) ?? FF 83 (F8|F9) 3D 74 05 83 (F8|F9) 2E 75 01 (49|4A) [0-30] 2E 75}
		$decode2 = {B0 40 C3 B0 3F C3 89 C8 04 D0 3C 09 77 06 80 C1 04 89 C8 C3 89 C8 04 BF 3C}
		$decode3 = {B0 40 C3 B0 3F C3 80 F9 30 72 ?? 80 F9 39 77 06 80 C1 04 89 C8 C3}
		$decode4 = {89 C8 04 D0 3C 09 77 ?? [3-11] 89 C8 [0-1] C3 89 C8 04 BF 3C 1A 72 ?? 89 C8 04 9F 3C}

	condition:
		uint16( 0 ) == 0x5a4d and any of them
}