TROJ_CHKBOT.NA

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, Windows 7, and Windows Server 2008 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.

• For Windows 8, Windows 8.1, and Windows Server 2012 users

1. Access the Charms bar by moving your mouse pointer to the upper right corner of the screen.
2. Move your mouse pointer down and click Settings>Change your PC Settings.
3. In the left panel, click General.
4. In the right panel, scroll down to the bottom to find the Advanced startup section, then click the Restart now button and wait for the system to restart.
5. In the Advanced Startup menu, click Troubleshoot>Advanced Options>Startup Settings>Restart and wait for the system to restart.
6. In the Startup Settings menu, press 4 to enable safe mode.

To delete the registry key this malware/grayware created:

1. Open Registry Editor.
   » For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
   » For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower left corner of the screen, click 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>Windows Script
3. Still in the left panel, locate and delete the key:
   Settings
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software
5. Still in the left panel, locate and delete the key:
   MyCaseGet
6. Again Still in the left panel, locate and delete the key:
   oA848pt3preqfO
7. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>ESENT>Process
8. Still in the left panel, locate and delete the key:
   Game_Zhang_121
9. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>ESENT>Process>Game_Zhang_121
10. Still in the left panel, locate and delete the key:
    DEBUG
11. Close Registry Editor.

To delete the registry value this malware/grayware created:

1. Open Registry Editor.
   » For Windows 2000, Windows XP, and Windows Server 2003 users, click Start>Run, type regedit in the text box provided, and then press Enter.
   » For Windows Vista, Windows 7, and Windows Server 2008 users, click the Start button, type regedit in the Search input field then press Enter.
   » For Windows 8, Windows 8.1, and Windows Server 2012 users, right-click on the lower-left corner of the screen, click Run, type regedit in the text box provided, and 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:
   oA848pt3preqfO = "%Program Files%\oA848pt3preqfO\oA848pt3preqfO.exe"
4. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>Microsoft>Windows Script>Settings
5. In the right panel, locate and delete the entry:
   JITDebug = "0"
6. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>MyCaseGet
7. In the right panel, locate and delete the entry:
   9977843 = "0"
8. In the left panel, double-click the following:
   HKEY_CURRENT_USER>Software>oA848pt3preqfO
9. In the right panel, locate and delete the entry:
   AppPath = "%Program Files%\oA848pt3preqfO"
10. Again In the right panel, locate and delete the entry:
    AboutUs = "50006"
11. 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, 7, and Server 2008:
     Click the Start button, type REGEDIT in the Search input field then press Enter.
   • On Windows 8, 8.1, and Server 2012:
     Right-click on the lower left corner of the screen and click Run, type REGEDIT in the Run input field, and then press Enter.
2. In the left panel, double-click the following:
   HKEY_LOCAL_MACHINE>SYSTEM>ControlSet001>Services>Eventlog>Application>ESENT
3. In the right panel, locate the registry value:
   EventMessageFile = "%System%\ESENT.dll"
4. Right-click on the value name and choose Modify. Change the value data of this entry to:
   EventMessageFile = "{random values}"
5. Again In the right panel, locate the registry value:
   CategoryMessageFile = "%System%\ESENT.dll"
6. Right-click on the value name and choose Modify. Change the value data of this entry to:
   CategoryMessageFile = "{random values}"
7. Again In the right panel, locate the registry value:
   CategoryCount = "1"
8. Right-click on the value name and choose Modify. Change the value data of this entry to:
   CategoryCount = "10"
9. Again In the right panel, locate the registry value:
   TypesSupported = "7"
10. Right-click on the value name and choose Modify. Change the value data of this entry to:
    TypesSupported = "7"
11. 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 File name* input box, type the following:
   
   • %System Root%\Sesp203_nv_u.exe
   • %System Root%\setup_50006.exe
   • %System Root%\Game_Zhang_121.exe
   • %System Root%\sevice_905_45078.exe
   • %User Profile%\HyhotbUrls\EdncajGsqxz.exe
   • %User Profile%\HyhotbUrls\Zyuan/back.jpg
   • %User Profile%\HyhotbUrls\Zyuan/close.jpg
   • %User Profile%\HyhotbUrls\Zyuan/close.png
   • %User Profile%\HyhotbUrls\Zyuan/config.ini
   • %User Profile%\HyhotbUrls\Zyuan/ground.jpg
   • %User Profile%\HyhotbUrls\Zyuan/logo.png
   • %User Profile%\HyhotbUrls\Zyuan/min.png
   • %User Profile%\HyhotbUrls\Zyuan/name.png
   • %User Profile%\HyhotbUrls\Zyuan/skin
   • %User Profile%\HyhotbUrls\Zyuan/title.jpg
   • %User Profile%\HyhotbUrls\SeinynH0encnae
   • %System Root%\Sesp203_nv_u.exe.bat
   • %Program Files%\oA848pt3preqfO\oA848pt3preqfO.dat
   • %Program Files%\oA848pt3preqfO\oA848pt3preqfO.exe
   • %Desktop%\????.exe
   • %Program Files%\oA848pt3preqfO\GetMyApp.dat
   • %Program Files%\oA848pt3preqfO\GetMyApp.exe
   • %Windows%\KomLxiu\Houzik.sys
   • %User Profile%\tmpst\shst
   • %User Temp%\110kk011
   • %User Profile%\SQ PlatForm\9042399501616174882
   • %User Profile%\SQ PlatForm\5
   • %User Profile%\SQ PlatForm\4355426151826907678
   • %User Profile%\SQ PlatForm\5819387593380388219
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 delete it.
   *Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

• For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

1. Open a Windows Explorer window.
   • For Windows Vista, 7, and Server 2008 users, click Start>Computer.
   • For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen,then click File Explorer.
2. In the Search Computer/This PC input box, type:
   
   • %System Root%\Sesp203_nv_u.exe
   • %System Root%\setup_50006.exe
   • %System Root%\Game_Zhang_121.exe
   • %System Root%\sevice_905_45078.exe
   • %User Profile%\HyhotbUrls\EdncajGsqxz.exe
   • %User Profile%\HyhotbUrls\Zyuan/back.jpg
   • %User Profile%\HyhotbUrls\Zyuan/close.jpg
   • %User Profile%\HyhotbUrls\Zyuan/close.png
   • %User Profile%\HyhotbUrls\Zyuan/config.ini
   • %User Profile%\HyhotbUrls\Zyuan/ground.jpg
   • %User Profile%\HyhotbUrls\Zyuan/logo.png
   • %User Profile%\HyhotbUrls\Zyuan/min.png
   • %User Profile%\HyhotbUrls\Zyuan/name.png
   • %User Profile%\HyhotbUrls\Zyuan/skin
   • %User Profile%\HyhotbUrls\Zyuan/title.jpg
   • %User Profile%\HyhotbUrls\SeinynH0encnae
   • %System Root%\Sesp203_nv_u.exe.bat
   • %Program Files%\oA848pt3preqfO\oA848pt3preqfO.dat
   • %Program Files%\oA848pt3preqfO\oA848pt3preqfO.exe
   • %Desktop%\????.exe
   • %Program Files%\oA848pt3preqfO\GetMyApp.dat
   • %Program Files%\oA848pt3preqfO\GetMyApp.exe
   • %Windows%\KomLxiu\Houzik.sys
   • %User Profile%\tmpst\shst
   • %User Temp%\110kk011
   • %User Profile%\SQ PlatForm\9042399501616174882
   • %User Profile%\SQ PlatForm\5
   • %User Profile%\SQ PlatForm\4355426151826907678
   • %User Profile%\SQ PlatForm\5819387593380388219
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 malware/grayware/spyware folders:

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

1. Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
2. In the File name* input box, type:
   
   • %User Profile%\Application Data\HyhotbUrls
   • %User Profile%\HyhotbUrls\Zyuan
   • %Program Files%\oA848pt3preqfO
   • %Windows%\KomLxiu
   • %User Profile%\Application Data\tmpst
   • %User Profile%\Application Data\SQ PlatForm
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.
5. Repeat steps 2 to 4 for the remaining folders:
   • %User Profile%\Application Data\HyhotbUrls
   • %User Profile%\HyhotbUrls\Zyuan
   • %Program Files%\oA848pt3preqfO
   • %Windows%\KomLxiu
   • %User Profile%\Application Data\tmpst
   • %User Profile%\Application Data\SQ PlatForm
   *Note: The file name input box title varies depending on the Windows version (e.g. Search for files or folders named or All or part of the file name.).

For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:

1. Open a Windows Explorer window.
   • For Windows Vista, 7, and Server 2008 users, click Start>Computer.
   • For Windows 8, 8.1, and Server 2012 users, right-click on the lower left corner of the screen, then click File Explorer.
2. In the Search Computer/This PC input box, type:
   
   • %User Profile%\Application Data\HyhotbUrls
   • %User Profile%\HyhotbUrls\Zyuan
   • %Program Files%\oA848pt3preqfO
   • %Windows%\KomLxiu
   • %User Profile%\Application Data\tmpst
   • %User Profile%\Application Data\SQ PlatForm
3. Once located, select the file then press SHIFT+DELETE to permanently delete the folder.
4. Repeat steps 2-3 for the remaining folders:
   • %User Profile%\Application Data\HyhotbUrls
   • %User Profile%\HyhotbUrls\Zyuan
   • %Program Files%\oA848pt3preqfO
   • %Windows%\KomLxiu
   • %User Profile%\Application Data\tmpst
   • %User Profile%\Application Data\SQ PlatForm
   *Note: Read the following Microsoft page if these steps do not work on Windows 7.