Think the days of major virus outbreaks are a thing of the past? Think
According to an analysis by Postini of 150 billion e-mail messages sent in
2005, e-mail-borne viruses represented 2.5 percent of all inbound e-mail
The reason for the increase is partially attributable to the Sober virus, which Postini reports was the largest virus outbreak it has ever recorded.
In the four-week period between Thanksgiving and Christmas, Postini
reported that it blocked 1.2 billion e-mails that contained the sober virus. Overall, Sober represented 46 percent of all intercepted viruses by Postini in 2005.
Andrew Lochart senior director of marketing at Postini, commented that
before the Sober outbreak, viruses were trending at 1.5 percent to 2 percent
of all messages.
The extra half to 1 percent jump to 2.5 percent for the
year came just from the year-end Sober outbreak. A recent study from IBM reported that 2.8 percent of all e-mails in 2005 contained a virus.
“I think we were very surprised to see that, in this day and age, there
could be a worm that virulent that could propagate itself to so many
computers,” Lochart told internetnews.com.
“It’s easy for us to assume
working in the corporate industry that all PCs have some form of anti-virus
protection, and I think we forget about the fact that, in emerging markets and
here in the U.S., we still have so many new computer users — new always-on
“A hacker that writes a nice piece of code can get a virus to propagate
itself in an unbelievable fashion.”
The Sober outbreak also affected the overall percentage of spam in e-mail
traffic, which hovered between 75 and 80 percent for the year.
The top spam categories by message were software and discount drugs at 28
Percent. Following closely behind that were frauds, scams and phishing at 27 percent. Pornography-related spam came in at 15 percent.
Postini’s analysis also found that e-mail users at smaller companies receive
four times more spam than those at bigger companies.
While IBM’s study found an increase in targeted attacks, Lochart does not
see attackers specifically targeting Postini itself. At least not
“We’re processing e-mail for a lot of companies worldwide, and it has occurred
to us that we might have a target on our backs,” Lochart said candidly. “But
when we look at the data, we so far do not see any evidence that we’ve been
targeted by a DoS or anything like that.”