Blackhole exploit kit

The Blackhole exploit kit is as of 2012 the most prevalent web threat, where 29% of all web threats detected by Sophos and 91% by AVG are due to this exploit kit. Its purpose is to deliver a malicious payload to a victim's computer. According to Trend Micro the majority of infections due to this exploit kit were done in a series of high volume spam runs. The kit incorporates tracking mechanisms so that people maintaining the kit know considerable information about the victims arriving at the kit's landing page. The information tracked includes the victim's country, operating system, browser and which piece of software on the victim's computer was exploited. These details are shown in the kit's user interface.