SEKOIA_Ransomware_Win_Redeemer

rule SEKOIA_Ransomware_Win_Redeemer : FILE
{
	meta:
		description = "Finds Redeemer samples based on characteristic strings"
		author = "Sekoia.io"
		id = "ef94c1b0-d292-4fae-9801-4860e7347745"
		date = "2022-12-09"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/ransomware_win_redeemer.yar#L1-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "c1798a18e763277d19a3b698459244a2bc2eeebbbf239db7540d1493955ce5f0"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$str0 = "RedeemerMutex" ascii
		$str1 = "SOFTWARE\\Redeemer" ascii
		$str2 = "-----BEGIN REDEEMER PUBLIC KEY-----" ascii
		$str3 = "dnNzYWRtaW4gZGVsZXRlIHNoYWRvd3MgL0FsbCAvUXVpZXQ=" ascii
		$str4 = "d2V2dHV0aWwgY2xlYXItbG9nIEFwcGxpY2F0aW9u" ascii
		$str5 = "d2JhZG1pbiBkZWxldGUgc3lzdGVtc3RhdGViYWNrdXAgLWRlbGV0ZW9sZGVzdCAtcXVpZXQ=" ascii
		$str6 = "YXNzb2MgLnJlZGVlbT1yZWRlZW1lcg==" ascii
		$str7 = "UmVkZWVtZXIgUmFuc29td2FyZSAtIFlvdXIgRGF0YSBJcyBFbmNyeXB0ZWQ=" ascii
		$str8 = "redeemer\\DefaultIcon" wide
		$str9 = "\\Redeemer.sys" wide

	condition:
		uint16( 0 ) == 0x5A4D and 2 of them
}