TROJ_CITRON.GF

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 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_CURRENT_USER>Software>VB and VBA Program Settings>Microsoft
3. Still in the left panel, locate and delete the key:
   Sysinternals
4. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options
5. Still in the left panel, locate and delete the key:
   wservice.exe
6. Again Still in the left panel, locate and delete the key:
   rstrui.exe
7. Again Still in the left panel, locate and delete the key:
   AvastSvc.exe
8. Again Still in the left panel, locate and delete the key:
   avconfig.exe
9. Again Still in the left panel, locate and delete the key:
   AvastUI.exe
10. Again Still in the left panel, locate and delete the key:
    avscan.exe
11. Again Still in the left panel, locate and delete the key:
    instup.exe
12. Again Still in the left panel, locate and delete the key:
    mbam.exe
13. Again Still in the left panel, locate and delete the key:
    mbamgui.exe
14. Again Still in the left panel, locate and delete the key:
    mbampt.exe
15. Again Still in the left panel, locate and delete the key:
    mbamscheduler.exe
16. Again Still in the left panel, locate and delete the key:
    mbamservice.exe
17. Again Still in the left panel, locate and delete the key:
    hijackthis.exe
18. Again Still in the left panel, locate and delete the key:
    spybotsd.exe
19. Again Still in the left panel, locate and delete the key:
    ccuac.exe
20. Again Still in the left panel, locate and delete the key:
    avcenter.exe
21. Again Still in the left panel, locate and delete the key:
    avguard.exe
22. Again Still in the left panel, locate and delete the key:
    avgnt.exe
23. Again Still in the left panel, locate and delete the key:
    avgui.exe
24. Again Still in the left panel, locate and delete the key:
    avgcsrvx.exe
25. Again Still in the left panel, locate and delete the key:
    avgidsagent.exe
26. Again Still in the left panel, locate and delete the key:
    avgrsx.exe
27. Again Still in the left panel, locate and delete the key:
    avgwdsvc.exe
28. Again Still in the left panel, locate and delete the key:
    egui.exe
29. Again Still in the left panel, locate and delete the key:
    zlclient.exe
30. Again Still in the left panel, locate and delete the key:
    bdagent.exe
31. Again Still in the left panel, locate and delete the key:
    keyscrambler.exe
32. Again Still in the left panel, locate and delete the key:
    avp.exe
33. Again Still in the left panel, locate and delete the key:
    wireshark.exe
34. Again Still in the left panel, locate and delete the key:
    ComboFix.exe
35. Again Still in the left panel, locate and delete the key:
    MSASCui.exe
36. Again Still in the left panel, locate and delete the key:
    MpCmdRun.exe
37. Again Still in the left panel, locate and delete the key:
    msseces.exe
38. Again Still in the left panel, locate and delete the key:
    MsMpEng.exe
39. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion
40. Still in the left panel, locate and delete the key:
    ime
41. 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_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>RunOnce
3. In the right panel, locate and delete the entry:
   WindowsUpdate = "{malware path and file name} "
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>VB and VBA Program Settings>Microsoft>Sysinternals
5. In the right panel, locate and delete the entry:
   S = "1"
6. Again In the right panel, locate and delete the entry:
   3243 = "{malware path and file name}"
7. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>rstrui.exe
8. In the right panel, locate and delete the entry:
   Debugger = "%System%\Microsoft.com"
9. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>AvastSvc.exe
10. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
11. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avconfig.exe
12. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
13. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>AvastUI.exe
14. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
15. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avscan.exe
16. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
17. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>instup.exe
18. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
19. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>mbam.exe
20. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
21. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>mbamgui.exe
22. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
23. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>mbampt.exe
24. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
25. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>mbamscheduler.exe
26. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
27. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>mbamservice.exe
28. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
29. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>hijackthis.exe
30. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
31. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>spybotsd.exe
32. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
33. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>ccuac.exe
34. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
35. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avcenter.exe
36. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
37. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avguard.exe
38. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
39. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avgnt.exe
40. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
41. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avgui.exe
42. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
43. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avgcsrvx.exe
44. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
45. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avgidsagent.exe
46. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
47. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avgrsx.exe
48. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
49. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avgwdsvc.exe
50. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
51. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>egui.exe
52. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
53. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>zlclient.exe
54. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
55. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>bdagent.exe
56. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
57. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>keyscrambler.exe
58. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
59. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>avp.exe
60. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
61. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>wireshark.exe
62. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
63. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>ComboFix.exe
64. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
65. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>MSASCui.exe
66. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
67. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>MpCmdRun.exe
68. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
69. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>msseces.exe
70. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
71. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>MsMpEng.exe
72. In the right panel, locate and delete the entry:
    Debugger = "%System%\Microsoft.com"
73. Again In the right panel, locate and delete the entry:
    BK = "active"
74. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVersion>ime
75. In the right panel, locate and delete the entry:
    WindowsUpdate = "{malware path and file name} "
76. Again In the right panel, locate and delete the entry:
    version = "{random characters}"
77. Close Registry Editor.

To restore registry values this malware/grayware modified:

1. Open Registry Editor. To do this:
   
   • On Windows 2000, XP, and Server 2003:
     Click Start>Run, type REGEDIT in the text box provided, and then press Enter.
   • On Windows Vista and 7:
     Click the Start button, type REGEDIT in the Search input field then press Enter.
2. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows NT>CurrentVersion>Windows
3. In the right panel, locate the registry value:
   Load = "%System%\Microsoft.com"
4. 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:
   
   • %Program Files%\Windows Services\3818273
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:
   
   • %Program Files%\Windows Services\3818273
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 delete the malware/grayware folder:

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:
   
   • %Program Files%\Windows Services
3. In the Look In drop-down list, select My Computer, then press Enter.
4. Once located, select the folder then press SHIFT+DELETE to permanently delete the folder.