Did you miss the part where the article said it seeks out a very limited and specific set of infections.

The tool is not meant to replace a proper antivirus, it is meant to supplement and assist whatever your current antivirus may be.

So if the bot you infected your virtual machine was not on the list of the type this program is meant to find and remove then it is no wonder that it was not detected. Especially since this program is likely not designed to search for malicious software that your regular anti-virus would 'find and remove'