The people of Metasploit released a new tool for performing Wardialing attacks. You must be wondering why a new wardialing tool in these times?
Well they came with a new idea, on using Voip services to perform the scans and they claim to reach 10.000 numbers in 8 hours aprox. No modem needed, yes you read right.
One of the great things about the WarVOX model is that once the data has been gathered, it is archived and available for re-analysis as new signatures, plugins, and tools are developed.
Also is interesting the analysis they perform, because they identify more things than a modem attached to a telephone line:
This model allows WarVOX to find and classify a wide range of interesting lines, including modems, faxes, voice mail boxes, PBXs, loops, dial tones, IVRs, and forwarders. WarVOX provides the unique ability to classify all telephone lines in a given range, not just those connected to modems, allowing for a comprehensive audit of a telephone system.
The tool is coded in ruby and you can download here