SEKOIA_Rat_Win_Ratel_Strings

rule SEKOIA_Rat_Win_Ratel_Strings : FILE
{
	meta:
		description = "Detect RATel based on characteristic strings"
		author = "Sekoia.io"
		id = "d0c8b89b-c811-47aa-9e03-717998c40d91"
		date = "2023-04-24"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/rat_win_ratel_strings.yar#L1-L28"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "ff5640b03ec3e535cdb86c2a0feb52d0c472928ff88a36ec9f66ac8aa07c9f69"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "[-] Error when changing folder." ascii
		$s2 = "cmd.exe" wide
		$s3 = "back slash find: " ascii
		$s4 = "MOD_ALL:" wide
		$s5 = "MOD_PERSISTENCE" wide
		$s6 = "MOD_DESTRUCTION:" wide
		$s7 = "MOD_RECONNECT" wide
		$s8 = "Software\\Microsoft\\Windows\\CurrentVersion\\Run" wide
		$s9 = "powershell.exe -command \"([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] 'Administrator')\"" wide
		$s10 = "The command was executed successfully but no data was returned."
		$s11 = "[-] TIMEOUT IN CREATEPROCESS, but all the processes in the name of: " ascii
		$s12 = "we were well and truly killed." ascii

	condition:
		( uint16be( 0 ) == 0x4d5a ) and filesize > 500KB and filesize < 3MB and 8 of them
}