kiwi_passwords.yar

/*	Benjamin DELPY `gentilkiwi`
	https://blog.gentilkiwi.com
	benjamin@gentilkiwi.com
	Licence : https://creativecommons.org/licenses/by/4.0/
*/
rule mimikatz
{
	meta:
		description		= "mimikatz"
		author			= "Benjamin DELPY (gentilkiwi)"
		tool_author		= "Benjamin DELPY (gentilkiwi)"

	strings:
		$exe_x86_1		= { 89 71 04 89 [0-3] 30 8d 04 bd }
		$exe_x86_2		= { 8b 4d e? 8b 45 f4 89 75 e? 89 01 85 ff 74 }
		
		$exe_x64_1		= { 33 ff 4? 89 37 4? 8b f3 45 85 c? 74}
		$exe_x64_2		= { 4c 8b df 49 [0-3] c1 e3 04 48 [0-3] 8b cb 4c 03 [0-3] d8 }

		$dll_1			= { c7 0? 00 00 01 00 [4-14] c7 0? 01 00 00 00 }
		$dll_2			= { c7 0? 10 02 00 00 ?? 89 4? }
		
		$sys_x86		= { a0 00 00 00 24 02 00 00 40 00 00 00 [0-4] b8 00 00 00 6c 02 00 00 40 00 00 00 }
		$sys_x64		= { 88 01 00 00 3c 04 00 00 40 00 00 00 [0-4] e8 02 00 00 f8 02 00 00 40 00 00 00 }

	condition:
		(all of ($exe_x86_*)) or (all of ($exe_x64_*)) or (all of ($dll_*)) or (any of ($sys_*))
}


rule mimikatz_lsass_mdmp
{
	meta:
		description		= "LSASS minidump file for mimikatz"
		author			= "Benjamin DELPY (gentilkiwi)"

	strings:
		$lsass			= "System32\\lsass.exe"	wide nocase

	condition:
		(uint32(0) == 0x504d444d) and $lsass
}


rule mimikatz_kirbi_ticket
{
	meta:
		description		= "KiRBi ticket for mimikatz"
		author			= "Benjamin DELPY (gentilkiwi)"

	strings:
		$asn1			= { 76 82 ?? ?? 30 82 ?? ?? a0 03 02 01 05 a1 03 02 01 16 }

	condition:
		$asn1 at 0
}


rule wce
{
	meta:
		description		= "wce"
		author			= "Benjamin DELPY (gentilkiwi)"
		tool_author		= "Hernan Ochoa (hernano)"

	strings:
		$hex_legacy		= { 8b ff 55 8b ec 6a 00 ff 75 0c ff 75 08 e8 [0-3] 5d c2 08 00 }
		$hex_x86		= { 8d 45 f0 50 8d 45 f8 50 8d 45 e8 50 6a 00 8d 45 fc 50 [0-8] 50 72 69 6d 61 72 79 00 }
		$hex_x64		= { ff f3 48 83 ec 30 48 8b d9 48 8d 15 [0-16] 50 72 69 6d 61 72 79 00 }

	condition:
		any of them
}


rule lsadump
{
	meta:
		description		= "LSA dump programe (bootkey/syskey) - pwdump and others"
		author			= "Benjamin DELPY (gentilkiwi)"

	strings:
		$str_sam_inc	= "\\Domains\\Account" ascii nocase
		$str_sam_exc	= "\\Domains\\Account\\Users\\Names\\" ascii nocase
		$hex_api_call	= {(41 b8 | 68) 00 00 00 02 [0-64] (68 | ba) ff 07 0f 00 }
		$str_msv_lsa	= { 4c 53 41 53 52 56 2e 44 4c 4c 00 [0-32] 6d 73 76 31 5f 30 2e 64 6c 6c 00 }
		$hex_bkey		= { 4b 53 53 4d [20-70] 05 00 01 00}

	condition:
		($str_sam_inc and not $str_sam_exc) or $hex_api_call or $str_msv_lsa or $hex_bkey
}

rule power_pe_injection
{
	meta:
		description		= "PowerShell with PE Reflective Injection"
		author			= "Benjamin DELPY (gentilkiwi)"

	strings:
		$str_loadlib	= "0x53, 0x48, 0x89, 0xe3, 0x48, 0x83, 0xec, 0x20, 0x66, 0x83, 0xe4, 0xc0, 0x48, 0xb9"
		
	condition:
		$str_loadlib
}