Pls see update information here: http://www.websense.com/securitylabs/alerts/alert.php?AlertID=716 Yesterday Websense Security Labs reported on our blog that there was a potential Worm propagating via Skype (see: http://www.websense.com/securitylabs/blog/blog.php?BlogID=101). After investigation we have discovered that this is not a self propagating worm and is actually a Trojan Horse. After discussions with the very helpful Skype security team, the behavior of this Trojan using the Skype API is as per the specifications of the API. The end-user who is running Skype does get notified that a program is attempting to access it and must acknowledge it. *there is no vulnerability in Skype at this time that has been uncovered* For more details on the Skype API see https://developer.skype.com/Docs/ApiDoc/Overview_of_the_Skype_API At the time of this alert the websites that were used to download the Skype API code and the site that is used to download new copies of the Trojan were both down. -----Original Message----- From: Christopher Mosby [mailto:m@xxxxxxxx] Sent: Tuesday, December 19, 2006 8:49 AM To: bugtraq@xxxxxxxxxxxxxxxxx Subject: [BULK] - New Skype Worm Websense Security Labs has had reports of a new worm that uses Skype to propagate. We are still investigating the issue but here are the details so far: * users receive messages via Skype Chat to download and run a file * the filename is called sp.exe * assuming the file is run it appears to drop and run a password stealing Trojan Horse * the file also appears to run another set of code that uses Skype to propagate the original file * the file is packed and has anti-debugging routines (NTKrnl Secure Suite packer) * the file connects to a remote server for additional code * the original site has been black holed and is not serving the code anymore * the number of victims is still TBD * the original infections appear to be in APAC region (Korea in particular) More: http://www.websense.com/securitylabs/alerts/alert.php?AlertID=716
