Trojans made up nearly two thirds (61 percent) of all new malware identified during the first quarter of 2010, says PandaLabs. According to the security firm's Q1 2010 report, the majority of these were banking trojans.

Panda Labs revealed the amount of new malware in circulation has continued to rise during the first quarter of 2010, while viruses were named the second biggest threat, making up 15.1 percent of all new malware identified.

The security firm named Spain as the most infected country, with 35 percent of all its PCs infected with malware. The USA was second as 17 percent of its PCs have malware installed on them, while Mexico was in third place with five percent of its PCs infected.

PandaLabs said cyber criminals had continued to exploit popular topics such as Apple's iPad and Facebook applications during Q1 of 2010, in a bid to spread malware.

Luis Corrons, technical director at PandaLabs, said: "The use of banking Trojans is one of the most profitable businesses that cybercriminals are working on today. They try to generate as many new samples as possible in order to avoid antivirus detection."

Corrons advised web users to update their software, including their OS, as soon as a new patch was made available, rather than selecting the 'remind me later option' while also using common sense when it comes to clicking on web links or sharing personal information.

"Don't trust anyone, or trust them in the same way you trust people in real life. Criminals will try to fool us in order to install malicious code into our computers, close this door and keep safe!"

 See also: Online banking fraud surges by 14 percent