SEKOIA_Apt_Gelsemium_Wolfsbane_Backdoor

rule SEKOIA_Apt_Gelsemium_Wolfsbane_Backdoor : FILE
{
	meta:
		description = "Detects Gelsemium's WolfsBane backdoor"
		author = "Sekoia.io"
		id = "db2ad5a4-b592-4646-a385-c668bb2ea090"
		date = "2024-11-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_gelsemium_wolfsbane_backdoor.yar#L1-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "1418fe9a743226b9661a2b6decb19db0"
		logic_hash = "97d5076ca4c204a2e2276fd250d64bc140da1f2c8dec9996db7a622385f2c0ac"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "udp_session"
		$ = "session_interface"
		$ = "plugin_persist"
		$ = "Udp.cpp"
		$ = "ikcp.c"
		$ = "' %s 2>/dev/null"

	condition:
		uint32be( 0 ) == 0x7f454c46 and filesize > 3MB and filesize < 4MB and 4 of them
}