DITEKSHEN_MALWARE_Win_Jssloader

rule DITEKSHEN_MALWARE_Win_Jssloader : FILE
{
	meta:
		description = "Detects JSSLoader RAT/backdoor"
		author = "ditekSHen"
		id = "ef710c21-5c64-513e-b882-b5768478976e"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L3722-L3752"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "91764dabfb40cb51914110de229ddb00cd565078fef83c825f7a86fa502fda37"
		score = 75
		quality = 73
		tags = "FILE"

	strings:
		$cmd1 = "Cmd_UPDATE" fullword ascii
		$cmd2 = "Cmd_IDLE" fullword ascii
		$cmd3 = "Cmd_EXE" fullword ascii
		$cmd4 = "Cmd_VBS" fullword ascii
		$cmd5 = "Cmd_JS" fullword ascii
		$cmd6 = "Cmd_PWS" fullword ascii
		$cmd7 = "Cmd_RAT" fullword ascii
		$cmd8 = "Cmd_UNINST" fullword ascii
		$cmd9 = "Cmd_RunDll" fullword ascii
		$s1 = "ANSWER_OK" fullword ascii
		$s2 = "GatherDFiles" ascii
		$s3 = "CommandCd" fullword ascii
		$s4 = "URL_GetCmd" fullword ascii
		$s5 = "\"host\": \"{0}\", \"domain\": \"{1}\", \"user\": \"{2}\"" wide
		$s6 = "pc_dns_host_name" wide
		$s7 = "\"adinfo\": { \"adinformation\":" wide
		$e1 = "//e:vbscript" wide
		$e2 = "//e:jscript" wide
		$e3 = "/c rundll32.exe" wide
		$e4 = "/C powershell" wide
		$e5 = "C:\\Windows\\System32\\cmd.exe" wide
		$e6 = "echo del /f" wide
		$e7 = "AT.U() {0}. format" wide

	condition:
		uint16( 0 ) == 0x5a4d and ( 5 of ( $cmd* ) or 5 of ( $s* ) or all of ( $e* ) or 7 of them )
}