Microblogging service Twitter has started to be targeted by online criminals with malware.

Kaspersky Lab has uncovered a fake Twitter profile created solely for the purpose of infecting people's computers.

The profile, with an alias that means "pretty rabbit" in Portuguese, has posted a link that purports to be a pornographic video, but is instead trojan software masquerading as MP3 files that steals data from the machine, according to Kaspersky's Viruslist.com blog.

The fake Twitter profile with a link purporting
to show video porn but which actually steals data.
(Credit: Viruslist.com)

"If you click on the link, you get a window that shows the progress of an automatic download of a so-called new version of Adobe Flash, which is supposedly required to watch the video. You end up with a file labeled Adobe Flash (it's a fake) on your machine; a technique that is currently very popular," the blog says.

The attack is dangerous because it does not require programming skills and could spread easily if it ends up high in Google search engine rankings. That is possible because Google indexes unprotected Twitter profiles.

This isn't the only security problem to hit Twitter. Last week, researcher Avi Raff launched a Web site devoted to security issues with Twitter called Twitpwn.

In his first dated post, he wrote about a vulnerability he discovered that allowed an attacker to force someone to follow him automatically. The vulnerability could still be exploited on Internet Explorer, he wrote on Monday in the US.

"A spammer or phisher could abuse this vulnerability to gain thousands of 'followers' and attempt social engineering attacks," Ryan Naraine, security evangelist at Kaspersky, wrote on the Zero Day blog of ZDNet.com.au sister site ZDNet.com.