WORM_INSTYLER.AA

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_CURRENT_USER>Software
3. Still in the left panel, locate and delete the key:
   mIRC
4. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>Software>Microsoft>Windows>CurrentVersion>Uninstall
5. Still in the left panel, locate and delete the key:
   mIRC
6. In the left panel, double-click the following:
   HKEY_CLASSES_ROOT
7. Still in the left panel, locate and delete the key:
   .cha
8. Again Still in the left panel, locate and delete the key:
   .chat
9. Again Still in the left panel, locate and delete the key:
   ChatFile
10. In the left panel, double-click the following:
    HKEY_CLASSES_ROOT>ChatFile
11. Still in the left panel, locate and delete the key:
    DefaultIcon
12. In the left panel, double-click the following:
    HKEY_CLASSES_ROOT>ChatFile>Shell>open
13. Still in the left panel, locate and delete the key:
    command
14. Again Still in the left panel, locate and delete the key:
    ddeexec
15. In the left panel, double-click the following:
    HKEY_CLASSES_ROOT>ChatFile>Shell>open>ddeexec
16. Still in the left panel, locate and delete the key:
    Application
17. Again Still in the left panel, locate and delete the key:
    ifexec
18. Again Still in the left panel, locate and delete the key:
    Topic
19. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Classes
20. Still in the left panel, locate and delete the key:
    irc
21. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Classes>irc
22. Still in the left panel, locate and delete the key:
    DefaultIcon
23. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Classes>irc>Shell>open
24. Still in the left panel, locate and delete the key:
    command
25. Again Still in the left panel, locate and delete the key:
    ddeexec
26. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Classes>irc>Shell>open>ddeexec
27. Still in the left panel, locate and delete the key:
    Application
28. Again Still in the left panel, locate and delete the key:
    ifexec
29. Again Still in the left panel, locate and delete the key:
    Topic
30. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft
31. Still in the left panel, locate and delete the key:
    Microsoft Agent
32. 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>Microsoft>Windows>CurrentVersion>Run
3. In the right panel, locate and delete the entry:
   WinXPService = "%Program Files%\k4v.pif"
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>mIRC
5. In the right panel, locate and delete the entry:
   DateUsed = "1326477047"
6. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows>CurrentVersion>Uninstall>mIRC
7. In the right panel, locate and delete the entry:
   DisplayName = "mIRC"
8. Again In the right panel, locate and delete the entry:
   UninstallString = "%Program Files%\k4v.pif -uninstall"
9. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Classes>irc
10. In the right panel, locate and delete the entry:
    EditFlags = "{random values}"
11. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Microsoft Agent
12. In the right panel, locate and delete the entry:
    VoiceEnabled = "1"
13. Again In the right panel, locate and delete the entry:
    UseVoiceTips = "1"
14. Again In the right panel, locate and delete the entry:
    KeyHoldHotKey = "91"
15. Again In the right panel, locate and delete the entry:
    UseBeepSRPrompt = "1"
16. Again In the right panel, locate and delete the entry:
    SRTimerDelay = "7d"
17. Again In the right panel, locate and delete the entry:
    SRModeID = "{random values}"
18. Again In the right panel, locate and delete the entry:
    EnableSpeaking = "1"
19. Again In the right panel, locate and delete the entry:
    UseBalloon = "1"
20. Again In the right panel, locate and delete the entry:
    UseCharacterFont = "1"
21. Again In the right panel, locate and delete the entry:
    UseSoundEffects = "1"
22. Again In the right panel, locate and delete the entry:
    SpeakingSpeed = "5"
23. Again In the right panel, locate and delete the entry:
    PropertySheetX = "f423f"
24. Again In the right panel, locate and delete the entry:
    PropertySheetY = "f423f"
25. Again In the right panel, locate and delete the entry:
    PropertySheetWidth = "0"
26. Again In the right panel, locate and delete the entry:
    PropertySheetHeight = "0"
27. Again In the right panel, locate and delete the entry:
    PropertySheetPage = "0"
28. Again In the right panel, locate and delete the entry:
    CommandsWindowLeft = "ffffffff"
29. Again In the right panel, locate and delete the entry:
    CommandsWindowTop = "ffffffff"
30. Again In the right panel, locate and delete the entry:
    CommandsWindowWidth = "c8"
31. Again In the right panel, locate and delete the entry:
    CommandsWindowHeight = "c8"
32. Again In the right panel, locate and delete the entry:
    CommandsWindowLocationSet = "0"
33. Close Registry Editor.

To delete malware/grayware component files:

1. Search for the following files:
   
   • %Program Files%\0313.INS
   • %Program Files%\86102025.INS
   • %Program Files%\27296716.INS
   • %Program Files%\31861617.INS
   • %Program Files%\37224256.INS
   • %Program Files%\8204747.INS
   • %Program Files%\7058408.INS
   • %Program Files%\91723679.INS
   • %Program Files%\77463279.INS
   • %Program Files%\69768441.INS
   • %Program Files%\71793066.INS
   • %Program Files%\16263294.INS
   • %Program Files%\46602466.INS
   • %Program Files%\82562790.INS
   • %Program Files%\48171491.INS
   • %Program Files%\87432872.INS
   • %Program Files%\77279764.INS
   • %Program Files%\49258879.INS
   • %Program Files%\8272202.INS
   • %Program Files%\e21.reg
   • %Program Files%\w97.reg
   • %Program Files%\a5p63.msp
   
   Note: To do a search for the following files, right-click Start then click Search... or Find..., depending on the version of Windows you are running. For each file to be deleted, type its file name in the Named input box. In the Look In drop-down list, select My Computer, then press Enter.
2. Once located, select the file then press SHIFT+DELETE to permanently delete the file.
3. Repeat the said steps for all files listed.