SEKOIA_Apt_Gamaredon_Ddrdoh_Vbs_Downloader_Vbs

rule SEKOIA_Apt_Gamaredon_Ddrdoh_Vbs_Downloader_Vbs : FILE
{
	meta:
		description = "Detects malicious VBScript executed by LNK/mshta"
		author = "Sekoia.io"
		id = "cc29d5d9-58bd-4f68-8673-daa41abfc7be"
		date = "2023-01-24"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_gamaredon_ddrdoh_vbs_downloader_vbs.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "c91e1ce26c0735e8c68fe39f2fbeda8aed51cd4f9a0b967b5d184843728dcef4"
		score = 75
		quality = 78
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "b24gZXJyb3IgcmVzd" ascii
		$ = "BinaryStream.readtext" ascii nocase
		$ = "createobject(\"msxml2.domdocument.3.0\").createelement(" ascii nocase
		$ = "Dim cSecond, cMinute, CHour, cDay, cMonth, cYear" ascii nocase
		$ = "tDate & \"T\" & tTime"
		$ = "AutoOpen" ascii nocase

	condition:
		5 of them and filesize < 50KB
}