EquationGroup_reverse_shell

rule EquationGroup_reverse_shell {
   meta:
      description = "Equation Group hack tool leaked by ShadowBrokers- file reverse.shell.script"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://medium.com/@shadowbrokerss/dont-forget-your-base-867d304a94b1"
      date = "2017-04-08"
      hash1 = "d29aa24e6fb9e3b3d007847e1630635d6c70186a36c4ab95268d28aa12896826"
      id = "0e9b8ff2-2187-5b61-a086-2ad4ff1a3b10"
   strings:
      $s1 = "sh >/dev/tcp/" ascii
      $s2 = " <&1 2>&1" fullword ascii
   condition:
      ( filesize < 1KB and all of them )
}