TROJ_DROPPR.IB

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.

To delete the registry key this malware/grayware created:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services
3. Still in the left panel, locate and delete the key:
   yrtdhqyq
4. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>CurrentControlSet>Services>yrtdhqyq
5. Still in the left panel, locate and delete the key:
   Parameters
6. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID
7. Still in the left panel, locate and delete the key:
   {405DA3F3-1769-073C-1FF3-CB624E7161B4}
8. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{405DA3F3-1769-073C-1FF3-CB624E7161B4}
9. Still in the left panel, locate and delete the key:
   InprocServer32
10. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes
11. Still in the left panel, locate and delete the key:
    Ptmqtxsv
12. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>Ptmqtxsv
13. Still in the left panel, locate and delete the key:
    CLSID
14. Again Still in the left panel, locate and delete the key:
    ProgID
15. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Explorer>ShellIconOverlayIdentifiers
16. Still in the left panel, locate and delete the key:
    Enhanced Storage
17. Close Registry Editor.

To delete the registry value this malware/grayware created:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{405DA3F3-1769-073C-1FF3-CB624E7161B4}>InprocServer32
3. In the right panel, locate and delete the entry:
   ThreadingModel = "Apartment"
4. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>yrtdhqyq
5. In the right panel, locate and delete the entry:
   ImagePath = "%SystemRoot%\System32\svchost.exe -k netsvcs"
6. Again In the right panel, locate and delete the entry:
   Description = "Monitor for i8042 Keyboard and PS/2 Mouse Port"
7. Again In the right panel, locate and delete the entry:
   DisplayName = "i8042 Keyboard and PS/2 Mouse Port Monitor"
8. Again In the right panel, locate and delete the entry:
   ErrorControl = "1"
9. Again In the right panel, locate and delete the entry:
   ObjectName = "LocalSystem"
10. Again In the right panel, locate and delete the entry:
    Start = "2"
11. Again In the right panel, locate and delete the entry:
    Type = "2"
12. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>yrtdhqyq>Parameters
13. In the right panel, locate and delete the entry:
    ServiceDll = "%System%\DLL221.dll"
14. Again In the right panel, locate and delete the entry:
    ServiceMain = "DllRegisterServer"
15. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Classes>CLSID>{405DA3F3-1769-073C-1FF3-CB624E7161B4}
16. In the right panel, locate and delete the entry:
    Version = "68"
17. Again In the right panel, locate and delete the entry:
    Flags = "1"
18. Close Registry Editor.

To restore the registry value this malware/grayware/spyware modified:

1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>SvcHost
3. In the right panel, locate the registry value:
   netsvcs = "{random characters}"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   netsvcs = "{random values}"
5. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>SystemRestore
6. In the right panel, locate the registry value:
   DisableSR = "0"
7. Close Registry Editor.

To delete the malware/grayware/spyware file:

1. Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
2. In the Named input box, type:
   
   • %System%\DLL221.dll
3. In the Look In drop-down list, select My Computer, then press Enter.
4. Once located, select the file then press SHIFT+DELETE to permanently delete the file.