CRAIU_Susp_Ios_Shutdown

rule CRAIU_Susp_Ios_Shutdown
{
	meta:
		description = "Detect shutdown.log files from sysdiags with suspicious entries"
		author = "Costin G. Raiu, Art of Noh, craiu@noh.ro"
		id = "08aa1fb9-7af0-515a-91a8-09ed35e48155"
		date = "2023-12-28"
		modified = "2024-03-05"
		reference = "https://securelist.com/shutdown-log-lightweight-ios-malware-detection-method/111734/"
		source_url = "https://github.com/craiu/yararules/blob/23cf0ca22021fa3684e180a18416b9ae1b695243/files/susp_ios_shutdown.yara#L2-L25"
		license_url = "https://github.com/craiu/yararules/blob/23cf0ca22021fa3684e180a18416b9ae1b695243/LICENSE"
		logic_hash = "936101f2dddb73f6dda41be47d775199c458aa4fecdcf348ed479da620343ea1"
		score = 65
		quality = 85
		tags = ""
		version = "1.0"
		tlp = "TLP:CLEAR"

	strings:
		$a1 = "these clients are still here:"
		$b1 = "/private/var/db/"
		$b2 = "/private/var/tmp/"
		$c1 = "After "

	condition:
		($c1 at 0 ) and $a1 and ( any of ( $b* ) )
}