SEKOIA_Infostealer_Win_Solarmarker_Dll

rule SEKOIA_Infostealer_Win_Solarmarker_Dll : FILE
{
	meta:
		description = "Finds SolarMarker DLL based on characteristic strings"
		author = "Sekoia.io"
		id = "a2fe7f09-7134-4054-ba40-5ea66785a26c"
		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/infostealer_win_solarmarker_dll.yar#L1-L28"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "5be0a95adb7e486cdec5f0e8433afed41516fc1a990e1d1ba00db7e8fb32dbbb"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$zka = "zkabsr" wide
		$str0 = "set_PersistKeyInCsp" ascii
		$str1 = "get_IV" ascii
		$str2 = "get_MachineName" ascii
		$str3 = "get_Current" ascii
		$str4 = "ps_script" ascii
		$str5 = "request_data" ascii
		$str6 = "WindowsBuiltInRole" ascii
		$str7 = "DllImportAttribute" ascii
		$str8 = "get_BlockSize" ascii
		$str9 = "GetRequestStream" ascii

	condition:
		uint16( 0 ) == 0x5A4D and ( ( $zka and 3 of ( $str* ) ) or ( all of ( $str* ) ) ) and filesize < 1MB
}