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VIRUS ALERTS - August 1, 2007

by Marianna Schmudlach / July 31, 2007 3:00 PM PDT

W32/Rbot-GSN

Type Worm

Aliases W32/Sdbot.worm.gen.ax

W32/Rbot-GSN is a worm with IRC backdoor functionality for the Windows platform.

W32/Rbot-GSN spreads to other network computers by exploiting common buffer overflow vulnerabilities, including: SRVSVC (MS06-040), RPC-DCOM (MS04-012) Symantec (SYM06-010) and ASN.1 (MS04-007). The worm may also spreads via network shares and removable storage devices.

W32/Rbot-GSN runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

W32/Rbot-GSN includes functionality to download, install and run new software.

Protection available since 1 August 2007

http://www.sophos.com/security/analyses/w32rbotgsn.html

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by Marianna Schmudlach / August 1, 2007 12:28 AM PDT
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by Marianna Schmudlach / August 1, 2007 12:56 AM PDT

First Report: 2007-08-01

Aliases: Trojan.Win32.Autoit.ar
W32.Imaut
W32/Checkout!4F51845B
W32/IrcBot.BAW.worm

This detection is for a worm which is capable of spreading through MSN Messenger

http://vil.nai.com/vil/content/v_142868.htm

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W32/Deletemp3.worm
by Marianna Schmudlach / August 1, 2007 12:58 AM PDT

First Report: 2007-08-01

Aliases: Trj/Autorun.J
Virus.Win32.AutoRun.ah
W32.Deletemusic
W32/Deletemp3.worm
Win32/AutoRun.AH
WORM_DELF.HXZ

W32/Deletemp3.worm is written using Borland Delphi and its payload is to delete any mp3 files found on the infected computer.

http://vil.nai.com/vil/content/v_142869.htm

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by Marianna Schmudlach / August 1, 2007 8:01 AM PDT

August 1st, 2007 by Carolyn Guevarra
Early today, Trend Micro Senior Threat Analyst Chenghuai Lu reports of Web site that hosts about 400 malicious programs (and counting). The malware samples seem to be just copies of each other. However, three specific groups stood out: TROJ_DROPPER.CKO, TROJ_CLICKER.QU, and TROJ_POLYCRYPT.G, which usually display adult-content Web sites on the victim

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A Bot Enhancement
by Marianna Schmudlach / August 1, 2007 8:05 AM PDT

1 August 2007

SophosLabs encountered a new variant of a botnet worm today with the discovery of W32/Rbot-GSN .

While the worm still contains the usual zombie functionality of a typical botnet in that it can spread via removable shared drives and network shares (via exploiting Microsoft vulnerabilities) and can turn an infected computer into a zombie machine, this new variant is different in that the bot can repackage itself into existing zipfiles with a random filename but with a file extension of .gif <many blank spaces>.scr using an internal zip engine.

More: http://www.sophos.com/security/blog/2007/08/439.html

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