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'Playboy' Virus Opening up Dangerous Backdoor
Contributed by: G3nu1n3, at 12/12/2004 08:44:00 PM.

Anti-virus vendors have raised the alarm for a new mass-mailing worm with a dangerous backdoor component.

The worm, called W32.Maslan.C@mm, arrives as an attachment promising naked photos of Playboy models but, if executed, drops an IRC (Inter Relay Chat) bot capable of transmitting passwords and sensitive information back to the virus writer.

The worm also spreads itself via poorly secured network shares and weak passwords and takes advantage of two known exploits—LSASS and RPC-DCOM—affecting Microsoft Windows users. Patches for both exploits have been available for some time, but unpatched machines are vulnerable to worm infection.It constructs messages using its own SMTP engine and harvests target e-mail addresses from the victim's machine. The worm uses several masking techniques including spoofed sender addresses and has been programmed to monitor Internet Explorer browser sessions to capture data relating to various financial sites.

According to an alert from McAfee, the backdoor is powerful enough to terminate the processes of various anti-virus security applications. An advisory from Symantec rates the risk as low, but distribution remains high.

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