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VIRUS ALERTS - May 2, 2004

by Marianna Schmudlach / May 2, 2004 1:22 AM PDT

W32.Sasser.B.Worm

Discovered on: May 01, 2004
Last Updated on: May 02, 2004 02:34:21 PM

W32.Sasser.B.Worm is a variant of W32.Sasser.Worm. It attempts to exploit the LSASS vulnerability described in Microsoft Security Bulletin MS04-011, and spreads by scanning randomly-chosen IP addresses for vulnerable systems.


--------------------------------------------------------------------------------
Notes:
The MD5 hash value for this worm is 0x1A2C0E6130850F8FD9B9B5309413CD00.
Symantec Security Response has developed a removal tool to clean the infections of W32.Sasser.B.Worm.

--------------------------------------------------------------------------------



Variants: W32.Sasser.Worm
Type: Worm
Infection Length: 15872 bytes



Systems Affected: Windows 2000, Windows Server 2003, Windows XP

More: http://securityresponse.symantec.com/avcenter/venc/data/w32.sasser.b.worm.html

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Trojan.Adwaheck
by Marianna Schmudlach / May 2, 2004 1:25 AM PDT

Discovered on: May 02, 2004
Last Updated on: May 02, 2004 03:23:24 PM

Trojan.Adwaheck is a trojan that contains both Adware and backdoor trojan functionality.



Type: Trojan Horse
Infection Length: 48,506 bytes

When Trojan.Adwaheck runs, it performs the following actions:

The trojan creates the value

"%Trojan_filename_without_extension%"="%Trojan_filename%"

in the registry key

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run

so that the trojan starts when you start or restart Windows.

More: http://securityresponse.symantec.com/avcenter/venc/data/trojan.adwaheck.html

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WORM_AGOBOT.IM
by Marianna Schmudlach / May 2, 2004 1:33 AM PDT

Virus type: Worm

Destructive: No

Description:


This memory-resident malware has both worm and backdoor capabilities.

Like many AGOBOT variants, this worm exploits the Windows LSASS Vulnerability (MS04-11).

This is a buffer overrun vulnerability that allows remote code execution. Once successfully exploited, a remote attacker is able to gain full control of the affected system.

For more information about this vulnerability, refer to the following Microsoft Web site:


MS04-011_MICROSOFT_WINDOWS
http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx
It attempts to log into systems using a list of user names and passwords.

It connects to an Internet Relay Chat (IRC) server and joins an IRC channel to listen for remote commands. It allows a remote user to execute malicious commands on the infected system.

It also terminates antivirus-related processes and steals CD keys of certain game applications.

It runs on Windows 2000 and XP.

http://www.trendmicro.com/vinfo/virusencyclo/default5.asp?VName=WORM_AGOBOT.IM

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