None Enablement and usage of SQL extended stored procedures for Windows shell command execution : PIEHOP ( filename : r3_iec104_control.exe ) ( MD5 : cd8f394652db3d0376ba24a990403d20 ) is a disruption tool written in Python and packaged with PyInstaller version 2.1 + that has the capability to connect to a user supplied remote MSSQL server for uploading files and issuing remote commands to a RTU .