Worm Attack on Skype and Yahoo IM via instant messages: Symantec and BKIS

Security researchers at Symantec and BKIS report worms hitting users of Yahoo Messenger and Skype via malicious instant messages. Security researchers have reported a new wave of attacks targeting users of Yahoo Messenger and Skype.
BKIS (Bach Khoa Internetwork Security) researchers on May 7 informed that the attack comes via messages which  urges the users to