SEKOIA_Apt_Oilrig_Saitama_Backdoor_May2022

rule SEKOIA_Apt_Oilrig_Saitama_Backdoor_May2022 : FILE
{
	meta:
		description = "Detects tje Saitama backdoor"
		author = "Sekoia.io"
		id = "4ea8c27f-c441-4616-a29b-2b5dfdd3bd20"
		date = "2022-05-13"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_oilrig_saitama_backdoor_may2022.yar#L1-L20"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "b3876995fde9c26052c39859684cec05e8c1bc8e2a62946b49ed328e84499dc6"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = { 7E [4] 7E [4] 59 0A 02 8E 69 06 28 [4] D1 0B 02 16 7E [4] 7E [4] 07 }
		$ = "systeminfo | findstr" wide
		$ = "powershell -exec bypass -enc" wide
		$ = "SendAndReceive : {0}" wide
		$ = "SleepSecond : Start" wide

	condition:
		uint16be( 0 ) == 0x4d5a and 2 of them
}