- The amount of spam in email traffic decreased by 0.3 percentage points compared to May’s figure and averaged 84.8%.
- The number of links to phishing sites remained unchanged compared to the previous months.
- Malicious files were found in 2.68% of all emails, an increase of 0.99 percentage points compared with the previous month.
- Spammers exploited the World Cup theme.
Spam in mail traffic
The amount of spam detected in mail traffic averaged 84.8% in June 2010. A low of 80% was recorded on 4 June with a peak value of 89% being reached on 27 June.
Spam in mail traffic in June 2010
Sources of spam
June saw major shifts in the rating of the most popular sources of spam: though the USA and India maintained their leading positions as the prime distributors of spam, three new members entered the Top 5 – Brazil, Columbia and Spain. In general, Spanish- and Portuguese-speaking countries are widely represented in the Top 20 with Mexico, Argentina, Portugal, Morocco and Chile among them.
Russia dropped from third to sixth position with 3.6% of spam distributed from its territory, a decrease of 1.8 percentage points compared to May.
Europe took the lead as the main spam distributor by region: almost 40% of the total volume of spam originated from this part of the world.
The amount of spam distributed from the UK increased slightly in June compared to the previous month, accounting for 2. 8%.
There were no changes in the Top 6 most popular targets for phishers. PayPal is the unsurpassed leader: in June the number of attacks on this e-pay system increased by 20 percentage points compared to May’s figure. The share of the other Top 6 members decreased. Facebook and HSBC swapped positions again to become third and fourth place respectively.
Notably, World of Warcraft appeared in the Top 10 in June. This popular online game has been mentioned more than once in our spam reports as an attractive target for phishers.
In June, PayPal users fell victim to an attack in which spammers tried their old trick of informing a user that their account has been blocked and in order to enable it again, a user must open the attachment and enter their login and password. The attachment contained a phishing HTML page.
Malware in mail traffic
In June, the Top 10 list of countries from which malware was distributed via email looked like this:
Interestingly, Pegel, Redirector and Trojan.Script.Iframer were distributed in very different emails – from fake notifications purportedly sent by social network sites, to standard messages with laconic text such as ‘see my photos’. Common to all of these bulk emails were HTML attachments or links to an HTML page.
More details about such bulk emails will be provided in the spam report for Q2, 2010.
Variants of one of the most dangerous rootkits currently in circulation, Trojan.Win32.TDSS, were also actively distributed via email in June, taking fourth and seventh places in the Top10. Variants of this program could be found in different links, however, always in the form of an attachment packed in a zipped archive. In order to distribute them, fraudsters used one of their favorite themes – taxes. In the email below spammers tried to mask the .exe extension of the archived file with the extension .doc.
In another bulk email which distributed a representative of the Trojan.Win32.TDSS family, fraudsters used a very popular trick – a fake notification about the possible infection of a recipient’s computer with Conficker. In order to treat this infection a user was instructed to download the setup.exe program attached to the message. Of course this program treated nothing at all.
Another malicious program, Trojan.Win32.VBKrypt.cpz, which didn’t make it into June’s Top 10, was distributed in emails which allegedly originated from Google and thanked a user for sending their CV.
The list of countries from which users most often received malicious programs distributed via email saw several changes compared to May:
Last month’s leaders, Germany and the UK, dropped two places, leaving Japan and the USA to fill their positions. However, only in the case of Japan did the quantity of malware received by users increase considerably, doubling in comparison to May’s figure. Interestingly, India dropped out of the Top 10, being replaced by China with 3.5% of all emails with malicious attachments.
Spam by category
The Medications and Health-Related Goods and Services category retained the lead for English-language spam. In June, this category’s share averaged 35%. Emails advertising Viagra imitated notifications from different social networks. They were also distributed with the header ‘Medications for men approved by FIFA’ or ‘World Cup. Bad news’.
The Computer Fraud category came second in the rating with 25% of all spam messages. The emails from this category also exploited the World Cup theme. For example, it was used in the majority of Nigerian letters which lie at the core of this category. This theme was beneficial for spammers who distributed offers to users encouraging them to try their luck in an online casino or by betting on football results.
June also saw amusing emails offering the recipients a chance to have a look at the ash from the volcano that disrupted European air traffic for several weeks:
The link in the email led to a website from which a user could buy a small bottle filled with grey sand and a certificate confirming that the grey material was genuine ash from the volcano with the unpronounceable name.
In June, the amount of spam decreased slightly compared to the previous month.
Brazil reentered the Top 10 prime distributors of spam.
Phishing emails mostly targeted the users of PayPal.
The World Cup theme was actively exploited by spammers worldwide.