forums.wsusoffline.net

The current versions of the Sonicwall Gateway Anit-Virus prevent the download of the .zip package, citing:

This request is blocked by the Firewall Gateway Anti-Virus Service.
Filecoder_Philadelphia.RN(Trojan)

Please report it as false-positive (some AVs block all AutoIT3-programs).

Source code of the AutoIt-components are inside the ZIP-file. I'll provide links, too:
http://trac.wsusoffline.net/browser/tags/wsusoffline10.9.2/UpdateGenerator.au3
http://trac.wsusoffline.net/browser/tags/wsusoffline10.9.2/client/UpdateInstaller.au3

You may report it here:
https://support.sonicwall.com/kb/sw7833

I had the same problem today with Sonicwall and submitted a case to them on this.

After disable Sonicwall AV, the local AV (Trend Micro) then blocked it on me too so I have submitted a case to Trend Micro as well.