SEKOIA_Apt_Backdoordiplomaty_Custommerlinagent_Strings

rule SEKOIA_Apt_Backdoordiplomaty_Custommerlinagent_Strings : FILE
{
	meta:
		description = "Detects custom variant of Merlin agent used by BackdoorDiplomaty"
		author = "Sekoia.io"
		id = "965693ba-93b8-4c52-9292-957884411968"
		date = "2024-06-06"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_backdoordiplomaty_custommerlinagent_strings.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "31d13e234dc3f68f6826a5310ac38693750f896318249d04a31c5e6c8d5eba91"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "agent.GetSpecificID"
		$ = "agent.ExecuteCommand"
		$ = "agent.getClient"
		$ = "agent.SignalListen"

	condition:
		uint16be( 0 ) == 0x4d5a and filesize < 10MB and all of them
}