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Twitter gets targeted again by worm-like phishing attack

A Web site called TwitterCut is being blamed

May 27, 2009 08:02 AM ET

IDG News Service - Twitter users have been tricked into divulging their login and password details to a Web site that then spammed their contacts.

The culprit is a Web site called TwitterCut. Some Twitter users began getting a message that appeared to be from one of their friends and included a link to the TwitterCut Web site. The message implied they could gain more Twitter contacts by following the link.

At one time TwitterCut looked quite similar to the real Twitter login page, said Mikko Hypponen, chief research offer for the security vendor F-Secure.

If a person entered their login details, TwitterCut would then send the same message via Twitter to all of the victim's contacts, a kind of phishing attack with worm-like characteristics. No malicious software is installed on a user's machine, Hypponen said.

Although TwitterCut probably holds the login details for many accounts, it doesn't appear those accounts have been used to spam out links to more dangerous Web sites.

TwitterCut's Web site has been reported to services that blacklist potentially harmful Web sites, although it is still active. In a warning message now on TwitterCut, the site's operators said they didn't mean to phish people.

Instead, they say they were trying to create a so-called Twitter Train, which are sites that purport to quickly give Twitter users lots of followers. They said they bought the login script on their site for $50.

"We were not phishing Twitter accounts whatsoever," the message said. "We're shutting down this site."

In an interview, one of TwitterCut's operators said the site had been live for less than three days and hadn't been decked out with all of its features. But TwitterCut was indexed by Google's search engine, which brought a flood of Twitter users, said Jordan Embry, who lives in Owensboro, Ky.

TwitterCut's site informed users that it would send a message to all of their friends, which meant it would not qualify as spam, Embry said.

Embry has since e-mailed Twitter to say that he meant no harm. He plans to scuttle the TwitterCut domain since it appears to have been blacklisted. TwitterCut did not retain the login details of the users, Embry said.

However, Embry said he's still interested in creating another service that lets Twitter users gain a larger following since it could make money from ads. TwitterCut got 9,000 unique hits just on Tuesday, he said.

Hypponen said Twitter should be on the lookout for signs of spam, such as when an identical message appears hundreds and hundreds of times across users' profiles that isn't a "retweet," or the intentional reposting of other content.


Reprinted with permission from

IDG.net
Story copyright 2009 International Data Group. All rights reserved.

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