signature-base/yara/gen_mimikittenz.yar

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/*
Yara Rule Set
Author: Florian Roth
Date: 2016-07-19
Identifier: Mimikittenz
*/
/* Rule Set ----------------------------------------------------------------- */
rule Invoke_mimikittenz {
meta:
description = "Detects Mimikittenz - file Invoke-mimikittenz.ps1"
license = "https://creativecommons.org/licenses/by-nc/4.0/"
author = "Florian Roth"
reference = "https://github.com/putterpanda/mimikittenz"
date = "2016-07-19"
score = 90
hash1 = "14e2f70470396a18c27debb419a4f4063c2ad5b6976f429d47f55e31066a5e6a"
strings:
$x1 = "[mimikittenz.MemProcInspector]" ascii
$s1 = "PROCESS_ALL_ACCESS = PROCESS_TERMINATE | PROCESS_CREATE_THREAD | PROCESS_SET_SESSIONID | PROCESS_VM_OPERATION |" fullword ascii
$s2 = "IntPtr processHandle = MInterop.OpenProcess(MInterop.PROCESS_WM_READ | MInterop.PROCESS_QUERY_INFORMATION, false, process.Id);" fullword ascii
$s3 = "&email=.{1,48}&create=.{1,2}&password=.{1,22}&metadata1=" ascii
$s4 = "[DllImport(\"kernel32.dll\", SetLastError = true)]" fullword ascii
condition:
( uint16(0) == 0x7566 and filesize < 60KB and 2 of them ) or $x1
}