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Can't Seem To Get Rid Of Trojan


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19 replies to this topic

#1 zasasax

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Posted 12 December 2007 - 08:15 AM

using AVG i keep "finding" a Trojan Horse BackDoor.generic9.GTX.
i've also ran Windows Malicious Software Removal Tool
and it too has identified a Trojan.
what can i do?


thanks for your help

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#2 rookie147

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Posted 12 December 2007 - 09:06 AM

Can you tell us the name and location of this file?

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#3 zasasax

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Posted 12 December 2007 - 10:58 PM

AVG gives me the following:

C:\inf.exe
C:\infs.exe
C:\Documents and Settings\Owner\Local Settings\Temporary Internet Files\Content.IE5\Q9OTURSF\infs[1].jpg


thank you!

#4 quietman7

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Posted 13 December 2007 - 07:49 AM

Have you tried doing your scans in "Safe Mode"?

You need to start there first. If rescanning in Safe Modes does not help, then do this.

You should print out these instructions, or copy them to a NotePad file for reading while in Safe Mode, because you will not be able to connect to the Internet to read from this site.

Please download ATF Cleaner by Atribune & save it to your desktop. DO NOT use yet.
Please download Sysclean Package & save it to your desktop.
  • Create a new folder on drive "C:\" and rename it Sysclean - (C:\Sysclean).
  • Place the sysclean.com inside that folder.
  • Then download the latest Virus Pattern Files - (Pattern files are usually named lptxxx.zip, where xxx is the pattern file number)
  • Extract (unzip) the lptxxx.zip pattern file into the Sysclean folder where you put sysclean.com. (Click here for information on how to extract a file if your not sure how to do this. DO NOT scan yet.
Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Double-click ATF-Cleaner.exe to run the program.
  • Under Main "Select Files to Delete" choose: Select All.
  • Click the Empty Selected button.
  • If you use Firefox browser click Firefox at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • If you use Opera browser click Opera at the top and choose: Select All
  • Click the Empty Selected button.
    If you would like to keep your saved passwords, please click No at the prompt.
  • Click Exit on the Main menu to close the program.
Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

Scan with Sysclean as follows:
  • Open the Sysclean folder and double-click on sysclean.com to start the scanning process.
  • Put a check mark on the "Automatically clean or delete infected files" option by clicking in the checkbox.
  • Click the Advanced >> button.
  • The scan options appear. Select the "Scan all local fixed drives".
  • Click the "Scan button" on the Trend Micro System Cleaner console.
  • It will take some time to complete. Be patient and let it clean whatever it finds.
  • Another MS-DOS window appears containing the log file (sysclean.log) generated in the same folder where the scan is completed - C:\Sysclean.
  • To view the log, click the "View button" on the Trend Micro System Cleaner console. The Trend Micro Sysclean Package - Log window appears.
    • The Files Detected section shows the viruses that were detected by System Cleaner.
    • The Files Clean section shows the viruses that were cleaned.
    • The Clean Fail section shows the viruses that were not cleaned.
  • Exit when done, reboot normally and re-enable your anti-virus program.
Instructions with screenshots are here if you need them.

When using Sysclean its best to use the Administrator's account or an account with Administrative rights otherwise you will not have access rights to scan some locations. You can also Use the "Run As" Command to Start a Program as an Administrator. Even when doing that, the scanning process may result in "Access Denied" messages for some files. This is normal because these files are protected by the system.
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#5 zasasax

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Posted 15 December 2007 - 08:51 AM

thanks!!
the 2nd set of instructions took care of my problem.
thank you so very much.

one more question...
what is a good program for preventing another trojan infection?

muchas gracias

#6 quietman7

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Posted 15 December 2007 - 01:48 PM

Now you should Create a New Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
  • Go to Start > Programs > Accessories > System Tools and click "System Restore".
  • Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
  • Then use Disk Cleanup to remove all but the most recently created Restore Point.
  • Go to Start > Run and type: Cleanmgr
  • Click "OK".
  • Click the "More Options" Tab.
  • Click "Clean Up" in the System Restore section to remove all previous restore points except the newly created one.
To protect yourself against malware and reduce the potential for re-infection, be sure to read:
"Simple and easy ways to keep your computer safe".
"How did I get infected?, With steps so it does not happen again!".
"Hardening Windows Security - Part 1" and "Hardening Windows Security - Part 2".
"IE Recommended Minimal Security Settings".
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#7 zasasax

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Posted 16 December 2007 - 06:54 AM

well, it seems i spoke too soon.
after a scan with AVG a "trojan horse backdoor.rbot.be" showed up.
what should i do now?

thanks for all the help.

#8 quietman7

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Posted 16 December 2007 - 07:33 AM

Did your scan provide a specific file name associated with this malware threat and where is it located (file path) at on your system? If your scan saved a log file, it should show exactly what and where the malware has been found so post that instead.
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#9 zasasax

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Posted 17 December 2007 - 10:35 AM

C:\WINDOWS\system32\symantec.exe

#10 quietman7

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Posted 17 December 2007 - 10:43 AM

Download Dr.Web CureIt & save it to your desktop. DO NOT perform a scan yet.

Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with Dr.Web CureIt as follows:
  • Double-click on cureit.exe to start the program. (ignore any prompts to update or check for a new version)
  • When the Dr.Web opens, an "Express Scan of your PC" notice will appear.
  • Under "Start the Express Scan Now", Click "OK" to start. This is a short scan that will scan the files currently running in memory and when something is found, click the Yes button when it asks you if you want to cure it.
  • Once the short scan has finished, Click Options > Change settings
  • Choose the "Scan tab" and UNcheck "Heuristic analysis"
  • Back at the main window, click "Select drives" (a red dot will show which drives have been chosen)
  • Then click the "Start/Stop Scanning" button (green arrow on the right) and the scan will start.
  • When done, a message will be displayed at the bottom advising if any viruses were found.
  • Click "Yes to all" if it asks if you want to cure/move the file.
  • When the scan has finished, look if you can see the icon next to the files found. If so, click it, then click the next icon right below and select "Move incurable".
    (This will move it to the C:\Documents and Settings\userprofile\DoctorWeb\Quarantine folder if it can't be cured)
  • Next, in the Dr.Web CureIt menu on top, click file and choose save report list.
  • Save the DrWeb.csv report to your desktop. (You can use Notepad to open/view the DrWeb.cvs report)
  • Exit Dr.Web Cureit when done.
  • Important! Reboot your computer because it could be possible that files in use will be moved/deleted during reboot.
  • After reboot, post the contents of the log from Dr.Web in your next reply.

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#11 zasasax

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Posted 17 December 2007 - 03:47 PM

KillWind.exe;
C:\hp\bin;Tool.ProcessKill;Incurable.Moved.;
Terminator.exe;
C:\hp\bin;Trojan.KillApp.30208;Deleted.;
WxBug.EXE;
C:\Program Files\AIM\Sysfiles;Adware.Aws;Incurable.Moved.;
A0204349.exe;
C:\System Volume Information\_restore{BC9F3C70-F33F-48FB-93C7-198E1A9B1607}\RP855;Trojan.KillApp.30208;Deleted.;

#12 quietman7

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Posted 17 December 2007 - 03:56 PM

Looks like Dr.Web found other malware but not the one we were looking for.

Download FileASSASSIN.zip and save to your desktop (this tool is compatible with Win 2000/NT/XP/Vista only).
  • Create a new folder on your C:\ drive called FileASSASSIN and extract (unzip) the file to that folder. (Click here for information on how to do this if not sure. Win 9x/2000 users click here.)
  • Open the folder and double-click on FileASSASSIN.exe.
  • Select the following file(s) to delete by dragging it onto the text area or select it using the (...) browse button.
    • symantec.exe <-- C:\Windows\system32\ folder
  • Select a removal method. Start with "Attempt FileASSASSIN's method of file removal."
  • Click delete and the removal process will begin.
  • If that did not work, start the program again, select the file(s) the same way as before and this time check "Use delete on reboot function from windows."
Note: If you cannot find the file(s), you may have to Reconfigure Windows XP to show hidden files, folders. (We are doing this so we can look for and delete hidden files if necessary but don't delete anything other than what I ask you to delete. After your system is clean, follow the same procedure to hide these files and folders again to protect them from accidental deletion).

When done remove any Startup RUN values by downloading and using Autoruns.
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#13 zasasax

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Posted 17 December 2007 - 06:36 PM

i cannot find the file.
i'm assuming this has to do with it being in the AVG virus vault? (i have 12 in there)
what should i do now?

once again, thank you so much for this. i greatly appreciate it

#14 quietman7

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Posted 18 December 2007 - 09:14 AM

Delete the bad files in the vault and rescan to see if your system comes up clean.

Make sure you should read:
"Understanding AVG7 Free Virus Vault"
"AVG FAQ #647: I have some files in the AVG Virus Vault. What next?"
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#15 zasasax

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Posted 19 December 2007 - 12:41 PM

the last AVG scan showed nothing.
should i create a new restore point?
i just want to make sure my system is clean again




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