SEKOIA_Loader_Win_Fudloader

rule SEKOIA_Loader_Win_Fudloader : FILE
{
	meta:
		description = "Finds FUD-Loader samples based on specific strings"
		author = "Sekoia.io"
		id = "4c2ac614-89af-4449-9fd2-9f935e4c27b8"
		date = "2023-09-25"
		modified = "2024-12-19"
		reference = "https://github.com/0day2/FUD-Loader/"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/loader_win_fudloader.yar#L1-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "bf19169963cfcbcf41a2dc5f9447738e957878972590b2a8d310eed1c54f3676"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$str01 = "set_WindowStyle" ascii
		$str02 = "set_FileName" ascii
		$str03 = "get_StartInfo" ascii
		$str04 = "GetRandomFileName" ascii
		$str05 = "DownloadFile" ascii
		$str06 = "GetTempPath" ascii
		$str07 = "ProcessStartInfo" ascii
		$str08 = "System.Diagnostics" ascii

	condition:
		uint16( 0 ) == 0x5a4d and all of them and filesize < 10KB
}