What is the Beagle.K worm?

The Beagle.K worm:

• Is a variant of Beagle.J that opens a backdoor on TCP port 2745 and uses its own SMTP engine to spread through email.
• Sends the attacker the port on which the backdoor listens, as well as the IP address.
• Attempts to spread through file-sharing networks, such as Kazaa and iMesh, by dropping itself into the folders that contain "shar" in their names.

Also known as: W32/Bagle.k, W32/Bagle-K, WORM_BAGLE.K

When Beagle.K is executed, it performs the following actions:

1. Copies itself as the following files:
   
   • %System%\winsys.exe
   • %System%\winsys.exeopen
   • %System%\winsys.exeopenopen
     
     
2. Adds the value:
   
   "ssate.exe"="%System%\winsys.exe"
   
   to the registry key:
   
   HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   
   so that W32.Beagle.K@mm runs when you start Windows.
   
   
3. Opens a backdoor on TCP port 2745.
   
   If an attacker sends a specially formatted data message to the port, the worm will allow an arbitrary file to be downloaded to the %Windir% folder. This file will be saved as %Windir%\iuplda<x>.exe, where <x> is a random string of characters.
   
   
4. Sends HTTP GET requests to the following Web sites on TCP port 80:
   
   • postertog.de
   • www.gfotxt.net
   • www.maiklibis.de
     
     The GET request sends the port number on which the infected computer listens, and the IP address.
     
     
5. Attempts to end the following processes, which are responsible for updating the signatures of various antivirus programs:
   
   • Atupdater.exe
   • Aupdate.exe
   • Autodown.exe
   • Autotrace.exe
   • Autoupdate.exe
   • Avltmain.exe
   • Avpupd.exe
   • Avwupd32.exe
   • Avxquar.exe
   • Cfiaudit.exe
   • Drwebupw.exe
   • Icssuppnt.exe
   • Icsupp95.exe
   • Luall.exe
   • Mcupdate.exe
   • Nupgrade.exe
   • Outpost.exe
   • Update.exe
     
     
6. Scans the files on the local drives with the following extensions:
   
   • .wab
   • .txt
   • .msg
   • .htm
   • .xml
   • .dbx
   • .mdx
   • .eml
   • .nch
   • .mmf
   • .ods
   • .cfg
   • .asp
   • .php
   • .pl
   • .adb
   • .tbb
   • .sht
   • .uin
   • .cgi
     
     and collects any email addresses it finds.
     
     
7. To spread across file-sharing networks, such as Kazaa and iMesh, W32.Beagle.K@mm drops itself into folders that contain the string "shar" in their names. The worm uses the file names from the following list:
   
   • ACDSee 9.exe
   • Adobe Photoshop 9 full.exe
   • Ahead Nero 7.exe
   • Matrix 3 Revolution English Subtitles.exe
   • Microsoft Office 2003 Crack, Working!.exe
   • Microsoft Office XP working Crack, Keygen.exe
   • Microsoft Windows XP, WinXP Crack, working Keygen.exe
   • Opera 8 New!.exe
   • Porno pics arhive, xxx.exe
   • Porno Screensaver.scr
   • Porno, sex, oral, anal cool, awesome!!.exe
   • Serials.txt.exe
   • WinAmp 5 Pro Keygen Crack Update.exe
   • WinAmp 6 New!.exe
   • Windown Longhorn Beta Leak.exe
   • Windows Sourcecode update.doc.exe
   • XXX hardcore images.exe
     
     
8. Uses its own SMTP engine to send itself to the email addresses found. The worm contains its own MIME-encoding routine and will compose the email in memory.
   
   
9. The worm will not send email messages to the addresses containing any of the following strings:
   • @hotmail.com
   • @msn.com
   • @microsoft
   • @avp.
   • noreply
   • local
   • root@
   • postmaster@

How to Remove the Beagle.K Worm?

Kaspersky Internet Security Can Prevent You From Virus and Intrusion. If Kaspersky detects Beagle.K during the scan, it will AUTOMATICALLY offer you the option of deleting it. Do this by following the program's instructions.

Follow these steps in removing the Beagle.K worm.

1. Disabling System Restore (Windows Me/XP)

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles: "How to disable or enable Windows Me/XP System Restore".

2. Terminating the Malware Program

1. Open Windows Task Manager.
   On Windows 95/98/ME systems, press
   CTRL+ALT+DELETE
   On Windows NT/2000/XP systems, press
   CTRL+SHIFT+ESC, and click the Processes tab.
2. In the list of running programs*, locate the process:
   WINSYS or WINSYS.EXE
3. Select the malware process, then press either the End Task or the End Process button, depending on the version of Windows on your system.
4. To check if the malware process has been terminated, close Task Manager, and then open it again.
5. Close Task Manager.

3. Removing Autostart Entries from the Registry

1. Open Registry Editor. To do this, click Start>Run, type Regedit, then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>
   Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   ssate.exe=%System%\winsys.exe
   Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 95, 98 and ME, C:\WINNT\System32 on Windows NT and 2000, and C:\Windows\System32 on Windows XP.
   

4. Removing Other Entries from the Registry

1. Still in the Registry Editor, double-click the following in the left panel:
   HKEY_CURRENT_USER>Software>DateTime
2. Close Registry Editor.

5. Deleting the Malware Dropped Files

This procedure deletes the malware dropped files during its installation (after you have restarted your system).

1. Open Windows Explorer. Click Start>Run. Type Explorer, then press Enter.
2. In the left-hand panel, double-click access:
   %System%
   Note: %System% is the Windows system folder.
3. Locate and delete the following files:
   Winsys.exe
   winsys.exeopen
   winsys.exeopenopen
4. Close Windows Explorer.

6. Updating the virus definitions

If you do not know which anti-virus software can provide strong protection for you, Kaspersky Internet Security is recommended.

1. Start your Kaspersky Internet Security and make sure that it is configured to scan all the files.
2. Run a full system scan.
3. If any files are detected as infected with Beagle.K, click Delete.

How to Disinfect My Computer from Worms?

In order to keep your computer protected, bear the following tips in mind:

1. If you have filtering tools installed, configure them to reject messages with the characteristics described above. If, in spite of doing this, you receive the message that contains the virus: do not open it, do not run the attached file and delete it, making sure that you also delete it from the Deleted Items folder.
2. Install a good antivirus in your computer. Select Kaspersky Internet Security to get the Kaspersky antivirus solution that best suits your needs.
3. Keep your antivirus updated. If automatic updates are available, configure your antivirus to use them.
4. Keep your permanent antivirus protection enabled at all times.

Detect and Removal Instruction for Other Variants: