SEKOIA_Backdoor_Blueshell

rule SEKOIA_Backdoor_Blueshell : FILE
{
	meta:
		description = "Detects BlueShell backdoor"
		author = "Sekoia.io"
		id = "8f1cd966-c4d8-44f9-8cd5-4f5277332546"
		date = "2023-09-08"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_blueshell.yar#L1-L23"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "348ae383f2aaef544951641dd7e2879afa23e37bdf429c6255254115bd3e10d5"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "BlueShell" ascii
		$s2 = "client.go" ascii
		$s3 = "server ip" ascii
		$s4 = "server port" ascii
		$s5 = "reconnect wait time" ascii
		$s6 = "shell" ascii
		$s7 = "socks" ascii
		$s8 = "socks5" ascii
		$s9 = "GetInteractiveShell" ascii

	condition:
		filesize < 11MB and all of them
}