HKTL_Nishang_PS1_Invoke_PowerShellTcpOneLine

rule HKTL_Nishang_PS1_Invoke_PowerShellTcpOneLine {
   meta:
      description = "Detects PowerShell Oneliner in Nishang's repository"
      author = "Florian Roth (Nextron Systems)"
      reference = "https://github.com/samratashok/nishang/blob/master/Shells/Invoke-PowerShellTcpOneLine.ps1"
      date = "2021-03-03"
      hash1 = "2f4c948974da341412ab742e14d8cdd33c1efa22b90135fcfae891f08494ac32"
      id = "0218ebbd-2dbe-5838-ab53-1e78e3f97b9e"
   strings:
      $s1 = "=([text.encoding]::ASCII).GetBytes((iex $" ascii wide
      $s2 = ".GetStream();[byte[]]$" ascii wide
      $s3 = "New-Object Net.Sockets.TCPClient('" ascii wide
   condition:
      all of them
}