The number of websites blocked for hosting malicious content rose to 2,797 websites per day in March, according to a MessageLabs report, a 197.2% increase over the previous month and the highest level since October 2008.
Photo: An email with images found by MessageLabs containing scripts
MessageLabs also reported that when the image was opened in a certain environment, the embedded script could trigger a pop-up ads from a number of different online advertisement service providers. Combined with tracking technology, the pop-up ads can be customized to the user’s location and language.
In March, 20.3% of email-borne malware contained links to malicious sites, a 16.5% increase since February. Spoofed postcard mails were responsible for 14.0% of malicious links in emails during March.
Email connections totalled 4.8 billion per day in March. Spam made up 75.7 percent of all emails, an increase of 2.4% since February. One in 181 emails contained viruses (an increase of 0.03% since February) and one in 284 emails comprised a phishing attack (a decrease of 0.17% since February)
MessageLabs is a messaging and web security company which was recently acquired by Symantec.