SEKOIA_Malware_Swordldr

rule SEKOIA_Malware_Swordldr : FILE
{
	meta:
		description = "Detects Swordldr. Maybe chunk_1 is too restrictive"
		author = "Sekoia.io"
		id = "4068c007-50f4-4913-a352-4a40dd4e452b"
		date = "2024-09-25"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/malware_swordldr.yar#L1-L29"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "d0cc758082e303275cbb8cd6b2048eff"
		hash = "7aa57da44718cd88f7d37b33a5d3ad74"
		logic_hash = "9e408181b9122925c0ff9efdaed688e659596b58b9108c0f280d9bc1624d73cb"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = { CC CC CC CC B0 01 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 02 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 03 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 04 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 05 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 06 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 07 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 08 C3 CC CC CC CC }
		$ = { CC CC CC CC B0 09 C3 CC CC CC CC }
		$chunk_1 = {
        48 63 44 24 40 44 8B 44 86 04 48 63 44 24 40 45 23 ?? 45 03 C0 8B 54 86 04 48 63 44 24 40 41 2B D0 41 03 ?? 89 54 86 04
        }

	condition:
		uint16be( 0 ) == 0x4d5a and 4 of them and #chunk_1 > 5
}