SEKOIA_Guloader_Vbscript

rule SEKOIA_Guloader_Vbscript : FILE
{
	meta:
		description = "visual basic script delivering GuLoader"
		author = "Sekoia.io"
		id = "3472e403-b1e6-4fdf-9770-af42d505b556"
		date = "2024-02-07"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/guloader_vbscript.yar#L1-L17"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "d0398b19ec57cff8afd52b06dc9da18788b1eefdf6be70650138e9b342d91d24"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = " = CreateObject(\"WScript.Shell\")"
		$s2 = " = Join("
		$s3 = ",vbnullstring)"

	condition:
		filesize < 20KB and all of them and #s1 > 1 and @s3- @s2 < 16
}