The UK was responsible for hosting 1.7 percent of the world's malware, says Sophos.
According to the security firm, in August 2007 the UK was the seventh worst offender when it came to hosting malware and was responsible for 0.8 percent of the world's total malware. The US topped the list, hosting most of the global malware.
However by April 2008, the UK was responsible for 1.1 percent and in November this year, the figure increased even further to 1.7 percent.
"While the UK is clearly not the worst offender, the fact that it is responsible for an increasing percentage of infected sites is worrying news," said Graham Cluley, senior technology consultant, Sophos.
"With web threats still on the rise, not only must website owners take a proactive approach to securing their sites, but all users browsing the internet should also take steps to protect themselves."
Cluley suggests website owners, operators and hosters should make protecting their web servers with anti-virus software a priority. Other important measures for website owners include blocking infected files and patching operating systems regularly.
See also: Over 50% of malware spread via web