October 17, 2005 5:01 PM PDT

Trojan masquerades as Skype update

Cybercriminals are spreading a malicious Trojan horse under the guise of an update to Skype, e-mail security firm MessageLabs said Monday.

The Trojan horse, a variant of IRCbot, arrives in an e-mail purporting to be an update to Skype, the popular Internet telephony application. Once opened the malicious software displays a phony installation error message. It then blocks access to security updates and installs a back door on computers, MessageLabs said in a statement.

The e-mail can have one of five different subject lines, which always refers to Skype. One, for example, reads: "Skype for Windows 1.4 - Have you got the new Skype?"

The e-mail body text advertises the Skype voice-over-IP application and urges the user to run the attached file to find out more, MessageLabs said.

The e-mail carrying the Trojan horse isn't widespread; MessageLabs has intercepted 150 copies since Sunday. It is the first such attack that pretends to be from Skype and users should watch out for such "social engineering," the company said.

Cybercriminals always try new things to dupe users into running malicious code. They have masked their Trojan horses as porn images, security updates, messages from system administrators, news photos and many other things.

12 comments

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Same old trick...
They've done this with Windows Update and dozens of other "updates".

Hopefully few people fall for this one.
Posted by zaznet (1117 comments )
Reply Link Flag
Skype Trojan
Well, I for one fell for it.... Any suggestions of what I should do now?
Posted by thannita (2 comments )
Link Flag
same old tricks
Yea, I've seen them before. I've also had a trojan add me to its friends list on MSN messanger, pretending to know me. I seen that, and just blocked him.. I forget the trojans name.
Posted by (77 comments )
Link Flag
Same old trick...
They've done this with Windows Update and dozens of other "updates".

Hopefully few people fall for this one.
Posted by zaznet (1117 comments )
Reply Link Flag
Skype Trojan
Well, I for one fell for it.... Any suggestions of what I should do now?
Posted by thannita (2 comments )
Link Flag
same old tricks
Yea, I've seen them before. I've also had a trojan add me to its friends list on MSN messanger, pretending to know me. I seen that, and just blocked him.. I forget the trojans name.
Posted by (77 comments )
Link Flag
Attachment
I stopped opening attachments a long time ago... Unless I've "arrange" with someone I "KNOW" to send me one.
Posted by (56 comments )
Reply Link Flag
Attachment
I stopped opening attachments a long time ago... Unless I've "arrange" with someone I "KNOW" to send me one.
Posted by (56 comments )
Reply Link Flag
 

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