WORM_TUPYM.A

To restart in Safe Mode:

• For Windows 2000 users

1. Restart your computer.
2. Press F8 when you see the Starting Windows bar at the bottom of the screen.
3. Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.

• For Windows XP users

1. Restart your computer.
2. Press F8 after the Power-On Self Test (POST) routine is done. If the Windows Advanced Options menu does not appear, try restarting then pressing F8 several times when the POST screen appears.
3. Choose the Safe Mode option from the Windows Advanced Options menu then press Enter.

• For Windows Server 2003 users

1. Restart your computer.
2. Press F8 after Windows starts up. If the Windows Advanced Options menu does not appear, try restarting again and pressing F8 several times afterward.
3. On the Windows Advanced Option menu, use the arrow keys to select Safe Mode then press Enter.

• For Windows Vista and Windows 7 users

1. Restart your computer.
2. Press F8 after the Power-On Self Test (POST) routine is done. If the Advanced Boot Options menu does not appear, try restarting and then pressing F8 several times after the POST screen is displayed.
3. On the Advanced Boot Options menu, use the arrow keys to select the Safe Mode option, and then press Enter.

To delete registry keys this malware/grayware created:

1. Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
 
• HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System
• HKEY_CURRENT_USER\\Software\\Policies\\Microsoft\\Internet Explorer
• HKEY_LOCAL_MACHINE\\SOFTWARE\\Policies\\Microsoft\\Internet Explorer
2. Close Registry Editor.

To delete the registry value this malware created:

1. Open Registry Editor. To do this, click Start>Run, type regedit in the text box provided, then press Enter.
2. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   Yahoo Messengger = "%System%\system3_.exe"
4. Again In the right panel, locate and delete the entry:
   Yahoo Messengger = "%Desktop%\system3_.exe"
5. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Explorer>WorkgroupCrawler>Shares
6. In the right panel, locate and delete the entry:
   shared = "\New Folder.exe"
7. In the left panel of the Registry Editor window, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>Schedule
8. In the right panel, locate and delete the entry:
   AtTaskMaxHours = "0"
9. In the left panel of the Registry Editor window, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>Internet Settings
10. In the right panel, locate and delete the entry:
    GlobalUserOffline = "0"
11. Close Registry Editor.

To restore the registry value this malware/grayware modified:

1. Open Registry Editor. Click Start>Run, type REGEDIT in the text box provided, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Internet Explorer>Main
3. In the right panel, locate the registry value:
   Start Page = "http://www.mydreamworld.50webs.com"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Start Page = {default page}
5. Again In the right panel, locate the registry value:
   Start Page = "http://www.advgoogle.blogspot.com"
6. Right-click on the value name and choose Modify. Change the value data of this entry to:
   Start Page = {default page} (for Windows 7 and Vista)
7. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>Schedule
8. In the right panel, locate the registry value:
   NextAtJobId = "2"
9. Right-click on the value name and choose Modify. Change the value data of this entry to:
   NextAtJobId = 1
10. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Internet Explorer>Main
11. In the right panel, locate the registry value:
    Default_Page_URL = "http://www.mydreamworld.50webs.com"
12. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Default_Page_URL = {default page}
13. Again In the right panel, locate the registry value:
    Default_Search_URL = "http://www.mydreamworld.50webs.com"
14. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Default_Search_URL = {default page}
15. Again In the right panel, locate the registry value:
    Search Page = "http://www.mydreamworld.50webs.com"
16. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Search Page = {default page}
17. Again In the right panel, locate the registry value:
    Start Page = "http://www.mydreamworld.50webs.com"
18. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Start Page = {default page}
19. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Winlogon
20. In the right panel, locate the registry value:
    Shell = "Explorer.exe system3_.exe"
21. Right-click on the value name and choose Modify. Change the value data of this entry to:
    Shell = Explorer.exe
22. Close Registry Editor.

To manually delete a malware/grayware file from an affected system:

• For Windows 2000, Windows XP, and Windows Server 2003:

1. Right-click Start then click Search....
2. In the left panel, click All Files.
3. In the Named input box, type the following:
   
   • %Windows%\Tasks\At1.job
   • %System%\autorun.ini
   • %Desktop%\autorun.ini
4. In the Look In drop-down list, select My Computer then press Enter.
5. Once located, select the file then press SHIFT+DELETE to delete it.

• For Windows Vista and Windows 7 users:

1. Click Start>Computer.
2. In the Search input box, type the following:
   
   • %Windows%\Tasks\At1.job
   • %System%\autorun.ini
   • %Desktop%\autorun.ini
3. Once located, select the file then press SHIFT+DELETE to delete it.
   *Note: Read the following Microsoft page if these steps do not work on Windows 7.

To identify and delete AUTORUN.INF files created:

1. Right-click the Start button then choose Search... or Find..., depending on the version of Windows you are running.
2. In the Named input box, type:
   AUTORUN.INF
3. In the Look in: drop-down list, select a drive, then press Enter.
4. Select the file, then open using Notepad.
5. Check if the following lines are present in the file:
   
   
   

   [Autorun]
   Open=system3_.exe
   Shellexecute=system3_.exe
   Shell\Open\command=system3_.exe
   Shell=Open

6. If the lines are present, delete the file.
7. Repeat steps 3 to 6 for the remaining AUTORUN.INF files in other remaining removable drives.
8. Close Search Results.