January 10, 2011
Spam Volume Makes a Comeback after Holiday Hiatus
As they say, all things come to an end and, as expected, the unusual lull in spamming activity between Christmas and the new year seems to have come to an end early today.
See the chart at left (click for larger view), which shows hourly message volume observed by some of Proofpoint's spam traps over the last two weeks. As if spam has returned to work from a long holiday break, volumes have been sharply rising this fine Monday morning to levels similar to those observed before the 12/25/10 "vacation."
Hourly spam volume has roughly doubled from the spam baseline observed over the holidays and is also back to showing the usual "spikey" behavior we see from spam campaigns. My friends over in the Proofpoint Attack Response Center confirm with me that this is "a resumption of previously seen traffic patterns."
In my previous post, I shared one of my unusually barren spam quarantine reports for one of my email addresses. The funky little image at right is today's situation...
As you can see in today's screen capture of the Proofpoint Enterprise Protection quarantine digest from the same account (click for larger image), there's roughly 3 times the amount of messages hitting that account today as last week.
The messages here still seem pretty heavy on pharma spam, but there are a few items that are possible phish, also a larger number of Asian language messages. As with last week, even though volumes have suddenly increased, Proofpoint is doing an excellent job of detecting, scoring and quarantining the new messages (aside: did you know that you can always see Proofpoint's current anti-spam effectiveness on our site?).
Not too much else to say about this right now except that it really does look like one (or maybe several) of the top spam senders took a holiday vacation and are now back at it on the second Monday of the new year.
While other botnets may have taken a hiatus as well, it does seem that the Rustock botnet is back to its spam-sending ways (as reported by The Guardian).