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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.
See more CNET content tagged:
Skype,
MessageLabs Ltd.,
trojan horse,
malicious code,
eBay Inc.





Hopefully few people fall for this one.
Hopefully few people fall for this one.
- Attachment
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by
October 18, 2005 7:37 AM PDT
- I stopped opening attachments a long time ago... Unless I've "arrange" with someone I "KNOW" to send me one.
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