SEKOIA_Backdoor_Oyster

rule SEKOIA_Backdoor_Oyster
{
	meta:
		description = "Detects files related to the Oyster backdoor."
		author = "Sekoia.io"
		id = "f95f98ea-1e52-45ae-8abf-a986f95d4ab2"
		date = "2024-08-29"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_oyster.yar#L1-L16"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "ffd84d0c7064bcd69121aa606bc642ff2b5c9927ba622260a02a9689c7ab8878"
		score = 75
		quality = 80
		tags = ""
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "CleanUp30.dll" ascii fullword
		$s2 = "MSTeamsSetup_c_l_.exe" ascii fullword

	condition:
		all of them
}