Obfuscated_JS_April17

rule Obfuscated_JS_April17 {
   meta:
      description = "Detects cloaked Mimikatz in JS obfuscation"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "Internal Research"
      date = "2017-04-21"
      id = "44abd2c0-5f8d-5a8c-b282-a09853e12054"
   strings:
      $s1 = "\";function Main(){for(var "  ascii
      $s2 = "=String.fromCharCode(parseInt(" ascii
      $s3 = "));(new Function(" ascii
   condition:
      filesize < 500KB and all of them
}