W32.Beagle.A@mm is a mass-mailing worm that accesses remote Web sites and sends email to any addresses it finds using its own SMTP engine. The email has the following characteristics:
Subject: Hi
Filename: <Random>.exe
Filesize: 15,872 bytes
The worm will only work until January 28, 2004 (See Note in step 1 in the "Technical Details" section below).
Also Known As: I-Worm.Bagle [Kaspersky], WORM_BAGLE.A [Trend], W32/Bagle-A [Sophos], W32/Bagle@MM [McAfee], Win32.Bagle.A [Computer Associates]
Type: Worm
Infection Length: 15,872 bytes
Systems Affected: Windows 2000, Windows 95, Windows 98, Windows Me, Windows NT, Windows Server 2003, Windows XP
Systems Not Affected: DOS, Linux, Macintosh, OS/2, UNIX, Windows 3.x
Wild:
Number of infections: 50 - 999
Number of sites: More than 10
Geographical distribution: High
Threat containment: Easy
Removal: Moderate
Threat Metrics
Wild:
High
Damage:
Low
Distribution:
HighDamage
Payload Trigger: n/a
Payload: n/a
Large scale e-mailing: Emails all the contacts it can find inside files with the extensions .wab, .htm, .html, and .txt
Deletes files: n/a
Modifies files: n/a
Degrades performance: n/a
Causes system instability: n/a
Releases confidential info: n/a
Compromises security settings: n/a
Distribution
Subject of email: Hi
Name of attachment: [Random] with .exe file extension
Size of attachment: 15,872 bytes
Time stamp of attachment: n/a
Ports: n/a
Shared drives: n/a
Target of infection: n/a
When W32.Beagle.A@mm is executed, it does the following:
Checks if the system date is later than January 28, 2004. If so, the worm will not do anything.
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Note: W32.Beagle.A@mm does not query NTP servers to get the time. Instead, it relies on local time information. This means that a computer with the wrong date may continue spreading this worm after January 28, 2004.
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Inserts the file %System%\bbeagle.exe.
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Note: %System% is a variable. The worm locates the System folder and copies itself to that location. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
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Launches calc.exe.
Adds the value:
"d3dupdate.exe" = "%system%\bbeagle.exe"
to the registry key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Run
Adds the values:
"uid" = "[Random Value]"
"frun" = "1"
to the registry key:
HKEY_CURRENT_USER\Software\Windows98
Scans the system for files with the extensions .wab, .txt, .htm, and .html, looks for email addresses within these files, and then emails itself to the addresses using its own SMTP engine.
The worm attempts to use the local DNS server to obtain the MX record for the recipient address' SMTP. If the local DNS server is unavailable, the worm uses a hard-coded server to obtain the MX record.
The email will have the following characteristics:
Subject: Hi
Message:
Test =)
<Random characters>
--
Test, yep.
Filename: <Random>.exe
Filesize: 15,872 bytes
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Notes:
The from address will be spoofed such that it will appear to come from someone belonging to the same domain as the receiver.
The worm will not send itself to any of the following email addresses:
.r1
@hotmail.com
@msn.com
@microsoft.com@av
Creates a notification thread that will contact a remote Web site (using local browser proxy settings) and announce the presence of the worm on the local system every 10 minutes. The list of contacted Web sites is predetermined, and the body of the worm contains it
Symantec Host IDS 4.1/4.1.1
Symantec Host IDS customers can prevent process execution of this worm by adding the following process name to the Windows process block configuration.
Process Name: bbeagle.exe
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":
Turn off and remove unneeded services. By default, many operating systems install auxiliary services that are not critical, such as an FTP server, telnet, and a Web server. These services are avenues of attack. If they are removed, blended threats have less avenues of attack and you have fewer services to maintain through patch updates.
If a blended threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
Configure your email server to block or remove email that contains file attachments that are commonly used to spread viruses, such as .vbs, .bat, .exe, .pif and .scr files.
Isolate infected computers quickly to prevent further compromising your organization. Perform a forensic analysis and restore the computers using trusted media.
Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
Manual Removal
As an alternative to using the removal tool, you can manually remove this threat.
Disable System Restore (Windows Me/XP).
Update the virus definitions.
Delete the value that was added to the registry, and then restart the system.
Run a full system scan and delete all the files detected as W32.Beagle.A@mm.
1. Disabling System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.
Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.
Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.
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Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, re-enable System Restore by following the instructions in the aforementioned documents.
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2. Deleting the value from the registry
Click Start, and then click Run. (The Run dialog box appears.)
Type regedit
Then click OK. (The Registry Editor opens.)
Navigate to the key:
HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Run
In the right pane, delete the value:
"d3dupdate.exe" = "%system%\bbeagle.exe"
Navigate to the key:
HKEY_CURRENT_USER\Software\Windows98
In the right pane, delete the values:
"uid" = "[Random Value]"
"frun" = "1"
Exit the Registry Editor, and then restart the system.
3. Scanning for and deleting the infected files
Start your Symantec antivirus program and make sure that it is configured to scan all the files.
For Norton AntiVirus consumer products: Read the document, "How to configure Norton AntiVirus to scan all files."
For Symantec AntiVirus Enterprise products: Read the document, "How to verify that a Symantec Corporate antivirus product is set to scan all files."
Run a full system scan.
If any files are detected as infected with W32.Beagle.A@mm, click Delete.
Additional information:
The worm tries to contact the following Web sites:
www.elrasshop.de
www.it-msc.de
www.getyourfree.net
www.dmdesign.de
64.176.228.13
www.leonzernitsky.com
216.98.136.248
216.98.134.247
www.cdromca.com
www.kunst-in-templin.de
vipweb.ru
antol-co.ru
www.bags-dostavka.mags.ru
www.5x12.ru
bose-audio.net
www.sttngdata.de
wh9.tu-dresden.de
www.micronuke.net
www.stadthagen.org
www.beasty-cars.de
www.polohexe.de
www.bino88.de
www.grefrathpaenz.de
www.bhamidy.de
www.mystic-vws.de
www.auto-hobby-essen.de
www.polozicke.de
www.twr-music.de
www.sc-erbendorf.de
www.montania.de
www.medi-martin.de
vvcgn.de
www.ballonfoto.com
www.marder-gmbh.de
www.dvd-filme.com
www.smeangol.com
i recommend you run this on your system,for peace of mind
Rick
Linear Mode
