ZXshell_20171211_chrsben

rule ZXshell_20171211_chrsben {
   meta:
      description = "Detects ZxShell variant surfaced in Dec 17"
      license = "Detection Rule License 1.1 https://github.com/Neo23x0/signature-base/blob/master/LICENSE"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://goo.gl/snc85M"
      date = "2017-12-11"
      hash1 = "dd01e7a1c9b20d36ea2d961737780f2c0d56005c370e50247e38c5ca80dcaa4f"
      id = "3bbfddb8-011a-52dd-b0c8-b35e6f740507"
   strings:
      $x1 = "ncProxyXll" fullword ascii

      $s1 = "Uniscribe.dll" fullword ascii
      $s2 = "GetModuleFileNameDll" fullword ascii
      $s4 = "$Hangzhou Shunwang Technology Co.,Ltd0" fullword ascii
   condition:
      uint16(0) == 0x5a4d and filesize < 2000KB and (
        pe.imphash() == "de481441d675e9aca4f20bd8e16a5faa" or
        pe.exports("PerfectWorld") or
        pe.exports("ncProxyXll") or
        1 of ($x*) or
        2 of them
      )
}