Cisco Talos is continually working to ensure that our threat intelligence not only accounts for the latest threats but also new versions of old threats, such as spam. This often means pursuing cybercriminals wherever they congregate. However, instead of wheeling-and-dealing using hidden servers on some mysterious dark web address, a surprisingly large number of cyber scofflaws prefer to operate right out in the open using social media. For example, Facebook is host to dozens of groups that serve as online marketplaces and exchanges for cybercriminals. Talos saw spam from services advertised in these Facebook groups show up in our own telemetry data, indicating a potential impact to Cisco customers from these groups.
Over the past several months, Cisco Talos has tracked several groups on Facebook where shady (at best) and illegal (at worst) activities frequently take place.