After the shutdown of McColo, which was aiding the distribution of about half of all spam on the internet globally, spam volumes dropped. However, since mid-November, spam volumes have been slowly inching their way back up as old botnets are being brought back online and potential new botnets are being created.
At this point, spam volumes have slowly crept back up to 80 percent of their pre-McColo shutdown levels (when reviewing daily averages):
The types of spam being seen in new attacks are similar to what was being sent around the Internet prior to the shutdown. The spam messages can be categorized into the following groups:
- Replica watches
- Generic pharmacy
- Erectile dysfunction drugs
- Weight loss
The spam is being sent from various countries...