Berlin, January 12, 2012 – The spam and malware landscape is changing. This
is shown by analysis conducted by the eleven Research Team on the spam
trends of 2011. Never before have there so many and such significant
fluctuations in spam volumes as in 2011. For 2012 the eleven researchers
expect spam to be send primarily isn short, massive and frequent waves which
increase the risk of system overload for e-mail infrastructures. E-mail users
should also pay closer attention: No longer can spam and phishing e-mails be
recognized at first glance. This increases the risk of giving up access information
for online banking, credit cards etc.
Spam volume 2011: Record fluctuation
2011 spam trends were characterized by the most significant in the history of
spamming since 2003. Massive declines in spam of considerably over 50%
occurred repeatedly throughout the year, the most recent being in December
2011. As compared to the prior month, spam volumes declined by 70.4%, which
was the primary reason for the significant decline in spam volumes to only 19%
of the value from December 2010. However, eleven experts see no reason to
give the all-clear just yet. Spam declines of up to 80% occurred at the turn of the
year 2010/2011 and as a result of the takedown of the Rustock botnet in March
2011; however, spam volumes increased considerably again each time. That
meant that spam volumes had returned to 78% of the value prior to the Rustock
takedown by November 2011.
There were also significant shifts in countries of origin and topics for spam emails.
The primary reason was the shutdown of the world’s largest botnet,
Rustock, on March 16, 2011. Before that point, a major percentage of global
spam came from western industrial nations: the USA had held the top position
for months. The dominant spam topic was pharmaceutical advertisements,
comprising up to 70% of all spam. After Rustock, countries such as the USA, the
United Kingdom and Germany all disappeared from the top-ten lists. The USA
only came in 14th in November. The new spam leaders were emerging nations,
particularly from Asia, led by India. Similar changes also occurred in spam
topics: after the Rustock takedown, casino spam became the primary spam
subject, accounting for over 50% of all spam. Casino spam was also a main
reason behind the significant spam growth starting in August 2011. December’s
spam decline was also caused by the absence of casino waves.
Another unsettling trend this year was the significant increase in localized spam
in which spammers specifically targeted German e-mail users. One reason for
such spam is the search for so-called “money mules,” i.e. individuals who make
their accounts available for money laundering. A second reason is the increased
number of online fraudsters (phishers and scammers) who want to access
confidential data this way. These e-mails were once detectable due to their poor
translation quality; such scammers, however, have become smarter and know
that an error-free text creates more trust.
The three most important spam trends for 2011
1. The spam trends allow for clear conclusions to be drawn about the
geographic and thematic distribution of leading botnets. The most
important spam topics – pharmaceutical and casino spam – come from
different sources. Pharmaceutical spam mostly comes from western
industrialized nations, while casino spam primarily comes from emerging
nations in Asia and Eastern Europe.
2. The spamming trend has shifted from continual propagation toward short,
yet massive, waves, which are particularly typical of casino spam. Such
waves often only last approximately 30 minutes and can repeat up to three
times a day. There can also be longer breaks, some of which last several
weeks.
3. The close connection between spam and malware dissemination has
continued. Spam declines are often accompanied by significant jumps in
malware levels, which primarily serve to disseminate Trojans and thus to
rebuild lost botnet resources. This was the case at the turn of the year
2010/2011, as well as after the Rustock shutdown.
Spam tends 2012: Access data become primary focus
1. Spamming will continue to shift from continued dissemination to short, yet
massive and frequent, waves. Spam peaks that develop in the short term
can lead to overload situations for e-mail servers.
2. There is a growing trend toward quality over quantity for spam, phishing,
and malware. Instead of sending as many e-mails as possible, they are
now being designed in such a way that the opening rate is many times
higher than to date. This goal is accomplished, for example, through
targeted malware and particularly through phishing campaigns geared
toward specific countries and target groups. In general, spam and
phishing campaigns are becoming increasingly professional. Both e-mails
as well as counterfeit Web sites can hardly be differentiated from the
originals these days. Initiators are becoming increasingly successful in
their efforts to create the impression that the e-mail in question is
particularly important and that the link or attachment must be opened.
3. Spammers will increasingly attempt to diversify their infrastructures as a
result of the recent botnet takedowns. The eleven Research Team has
already seen a rise in attempts to hijack legitimate mailboxes with the
intent of using them to send spam. E-mail login data will be a preferred
phishing target in 2012.
4. The use of popular events for spam and malware campaigns will continue
to increase. Popular topics as bait for spam, phishing, and malware are
being used even today.
5. At the same time, spam, phishing, and malware will continue to blend
together. In 2011, the number of multipurpose mailings in which phishing
pages included a malicious code, for example, increased considerably.
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