SEKOIA_Implant_Win_Havoc_Default_Strings

rule SEKOIA_Implant_Win_Havoc_Default_Strings : FILE
{
	meta:
		description = "Finds Havoc implants based on the embedded default strings"
		author = "Sekoia.io"
		id = "955c2211-4502-4258-ba4c-0d96a5624283"
		date = "2022-10-07"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/implant_win_havoc_default_strings.yar#L1-L23"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "dbf17e579071f265961657d73c6a2e51630b23e80376491df2e631cee5ffb1b4"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$str01 = "C:\\Windows\\System32\\notepad.exe" ascii
		$str02 = "C:\\Windows\\SysWOW64\\notepad.exe" ascii
		$str03 = "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36" ascii
		$str04 = "POST" wide
		$str05 = "\\??\\C:\\Windows\\System32\\ntdll.dll" wide
		$str06 = "X-Havoc: true" ascii
		$str07 = "X-Havoc-Agent: Demon" ascii
		$str08 = "/text.gif" ascii
		$str09 = "SeImpersonatePrivilege" ascii

	condition:
		uint16( 0 ) == 0x5A4D and 6 of them
}