Botnet worm in DOS attacks could wipe data out on infected PCs

As we all know, last week US and south korean websites are attacked by DOS attack ie Deniel of service attack . Approximately 50,000 computers are affected by DoS attack in Us and South Korea.

This attack started in july 4th ie on the weekend, on the Government and business sites in both USA and South Korea .

The programs used to wipe out files on the PC, effects the Masterboot record, which caused the problem in booting.

A dropper program called W32.Dozer that contains the other components is sent by W32.Mytob!gen to e-mail addresses it gathers from the compromised computer.

The Dozer Trojan serves as a backdoor and connects to IPs through certain ports, allowing it to update itself and to receive instructions on sites to attack,It's unclear if the DOS attacks will happen again because the infected PCs can receive new instructions at any time.