SEKOIA_Hacktool_Mimikatz_Obfuscated

rule SEKOIA_Hacktool_Mimikatz_Obfuscated : FILE
{
	meta:
		description = "Detects Mimikatz on strings obfuscation"
		author = "Sekoia.io"
		id = "bac4bb61-d250-4fc3-95a5-edd4e3c7ff83"
		date = "2022-07-22"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/hacktool_mimikatz_obfuscated.yar#L1-L25"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "9f75e10122df0f57382e939d82b0ab4047d3d42f198c59faa22177d6d5d9afd7"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$xor1 = "Benjamin Delpy" xor
		$xor2 = "sekurlsa" xor wide
		$xor3 = "minidumpfile.dmp" wide
		$xor4 = "lsadump_dcsync" xor wide
		$xor5 = "kuhl_m_lsadump_getSamKey" xor wide
		$b1 = "Benjamin Delpy" base64
		$b2 = "sekurlsa" base64 wide
		$b3 = "minidumpfile.dmp" base64 wide
		$b4 = "lsadump_dcsync" base64 wide
		$b5 = "kuhl_m_lsadump_getSamKey" base64 wide

	condition:
		uint16be( 0 ) == 0x4d5a and 3 of them and filesize < 5MB
}