EquationGroup_Toolset_Apr17_rc5

rule EquationGroup_Toolset_Apr17_rc5 {
   meta:
      description = "Detects EquationGroup Tool - April Leak"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://steemit.com/shadowbrokers/@theshadowbrokers/lost-in-translation"
      date = "2017-04-15"
      hash1 = "69e2c68c6ea7be338497863c0c5ab5c77d5f522f0a84ab20fe9c75c7f81318eb"
      id = "854c1726-4ba4-5464-a765-4dd154a1b166"
   strings:
      $s1 = "Usage: %s [d|e] session_key ciphertext" fullword ascii
      $s2 = "where session_key and ciphertext are strings of hex" fullword ascii
      $s3 = "d = decrypt mode, e = encrypt mode" fullword ascii
      $s4 = "Bad mode, should be 'd' or 'e'" fullword ascii
   condition:
      ( uint16(0) == 0x5a4d and filesize < 200KB and 2 of them )
}