Kriskynote_Mar17_3

rule Kriskynote_Mar17_3 {
   meta:
      description = "Detects Kriskynote Malware"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "Internal Research"
      date = "2017-03-03"
      hash1 = "fc838e07834994f25b3b271611e1014b3593278f0703a4a985fb4234936df492"
      id = "647fac4c-2326-5a68-9890-8236022c1548"
   strings:
      $s1 = "rundll32 %s Check" fullword ascii
      $s2 = "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RecentDocs" fullword ascii
      $s3 = "name=\"IsUserAdmin\"" fullword ascii
      $s4 = "zok]\\\\\\ZZYYY666564444" fullword ascii
   condition:
      ( uint16(0) == 0x5a4d and filesize < 2000KB and 2 of them )
}