After holiday lull, spam plague returns

Rustock botnet cranks up the volume, sends spam numbers climbing

After a holiday hiatus, spammers have returned to ply their trade boosting bogus products, security researchers said today.

During the Christmas season, spam volumes plummeted, falling to just 25 per cent of the August 2010 levels. But spammers are now back at work, said experts.

"The numbers aren't back up to the levels prior to the drop, but they are increasing," Patrik Runald, a senior manager of security research at Websense, said in an interview Monday. Websense spotted a new spike in spam that started early on Jan. 10.

Other security and anti-spam vendors, including Symantec and Commtouch have seen the same. Symantec attributed the increase in spam to the return to work by Rustock, a large botnet responsible during 2010 for a big part of the world's junk e-mail.

Around midnight London time Monday, Rustock again started spamming, said researchers with Symantec Hosted Service's group, which operates MessageLabs, the anti-spam service Symantec acquired in 2008.

"Rustock has resumed activity, and appears set to continue where it left off on December 25 as the biggest source of global spam," said a pair of analysts in a Monday post on the Symantec site.

For lack of any better information, several Rustock experts speculated that the botnet's operators may have simply taken a vacation. "We cannot confirm if the infrastructure is down, being sink holed, or [if] the folks behind it are just taking a break," said Joe Stewart, a researcher at Atlanta-based SecureWorks.

"It looks like they took a vacation, believe it or not," added Runald.

When spam volume plunged late last year, some took it decline as a sign that e-mail spam -- the traditional venue -- was on its last legs and would soon vanish.

Nope.

"As long as there's money to be made [by spamming], it will not go away," said Runald of e-mail pitches.

Runald also pointed out that previous spam drops had quickly rebounded, citing several "take-downs" of spammer command-and-control servers, including 2008's McColo event , when the hosting company by the same name was disconnected from the Internet. McColo hosted some of the biggest spam botnets, including Rustock. Pulling the plug on McColo sent spam numbers tumbling temporarily by more than 40 per cent.

Interestingly, spam conducted through social networking services, primarily Facebook, did not wane during the holidays, said Runald. That's a good clue that social network spam has become an important new weapon in the spammer arsenal.

"Spam is all social engineering driven," Runald pointed out. "But the success of spam on Facebook is four or five times that of e-mail spam because it's coming from a friend or a friend of a friend."

The lack of a corresponding decline in social network spam during December led Runald to think that there are different groups specializing in different types of spam.

"So last month's drop was not a move from e-mail to social networking, as some reported," said Runald. "Social network spam is an addition to e-mail, not a replacement. E-mail spam won't disappear until e-mail fundamentally changes, but that will never happen."

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags privacysymantecwebsensemessagelabs

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.
Gregg Keizer

Gregg Keizer

Computerworld (US)
Show Comments

Cool Tech

Toys for Boys

Family Friendly

Stocking Stuffer

SmartLens - Clip on Phone Camera Lens Set of 3

Learn more >

Christmas Gift Guide

Click for more ›

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Michael Hargreaves

Microsoft Office 365/Dell XPS 15 2-in-1

I’d recommend a Dell XPS 15 2-in-1 and the new Windows 10 to anyone who needs to get serious work done (before you kick back on your couch with your favourite Netflix show.)

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Cathy Giles

Brother MFC-L8900CDW

The Brother MFC-L8900CDW is an absolute stand out. I struggle to fault it.

Luke Hill

MSI GT75 TITAN

I need power and lots of it. As a Front End Web developer anything less just won’t cut it which is why the MSI GT75 is an outstanding laptop for me. It’s a sleek and futuristic looking, high quality, beast that has a touch of sci-fi flare about it.

Emily Tyson

MSI GE63 Raider

If you’re looking to invest in your next work horse laptop for work or home use, you can’t go wrong with the MSI GE63.

Laura Johnston

MSI GS65 Stealth Thin

If you can afford the price tag, it is well worth the money. It out performs any other laptop I have tried for gaming, and the transportable design and incredible display also make it ideal for work.

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?