SEKOIA_Backdoor_Sandman_Strings

rule SEKOIA_Backdoor_Sandman_Strings : FILE
{
	meta:
		description = "Detect the Sandman backdoor based on strings"
		author = "Sekoia.io"
		id = "7bac7a1e-7d4a-4410-9ad4-1c85beb6faaf"
		date = "2022-08-23"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_sandman_strings.yar#L1-L23"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "74ee1b73532d9050d5ed7ea0bed158322288a2f5b65255804ebf10dc1a4ea55b"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "e9f7c24c-879d-49f2-b9bf-2477dc28e2ee"
		$s2 = "System.Net.Sockets"
		$s3 = "ntpServer"
		$s4 = "payloadUrl"
		$s5 = "keepRunning"
		$s6 = "payloadSize"
		$s7 = "defaultNtpMessageSize"
		$s8 = "InjectShellcode"

	condition:
		uint16be( 0 ) == 0x4d5a and 7 of them or $s1
}