TrendLabs has received reports of a new worm spreading via Skype’s chat feature.

The worm is detected as WORM_PYKSE.A. It sends a link to all available contacts of an affected Skype user pointing to the image file shown below:

Clicking the said link also downloads another worm detected by Trend Micro as WORM_PYKSE.B. Moreover, it connects to several possibly malicious Web sites. As of this writing, however, these Web sites are all inaccessible

This worm behaves just like any other instant messaging malware eventhough it uses an application popular for its VoIP feature as its propagation vector.

This worm is already included in the latest Trend Micro pattern files.

Days after Microsoft issued a Security Advisory regarding the newly discovered Domain Name System (DNS) Server Service vulnerability on several Windows platforms, TrendLabs has received reports of a new worm already exploiting it. Several reports came from such countries as Brazil, Korea, and USA.

WORM_VANBOT.GC takes advantage of the abovementioned vulnerability by sending a specially crafted RPC packet to target machines. Successful exploitation of the said vulnerability allows this worm to further propagate and compromise the system.

Trend Micro already detects this worm with the latest pattern file. Users are thus advised to keep their antivirus programs updated to prevent possible infection of this worm.