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Trojan that I can't get rid of


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#1 Lemminkäinen

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Posted 12 July 2009 - 03:18 AM

Hi,

I have an infection that I can't seem to get rid of.

I have Windows XP and haven't been doing anything strange lately.

My AVG antivirus continually finds something called "Trojan horse BackDoor.Generic11.ACJJ" on my system as BNxx.tmp processes where the xx can be for example 9 or 64 or A or B. Files associated with this are named things like i386si.sys and port135sik.sys

I ran super antispyware and it found it but removing it doesn't seem to help (it comes back again and again). I have also tried AVG, Avira Antivir and a-squared to no avail. Antivir calls the virus TR/Crypt.XDR.Gen

Help?

Thank you for reading!

Edited by Lemminkäinen, 12 July 2009 - 09:38 AM.


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#2 garmanma

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Posted 12 July 2009 - 08:29 PM

Welcome back to BC
First lets clean up a little


ATF
Please download ATF Cleaner by Atribune & save it to your desktop.
  • 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".
------------------------------------

Then run mbam


The process of cleaning your computer may require you to temporarily disable some security programs. If you are using SpyBot Search and Destroy, please refer to Note 2 at the bottom of this page.

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link 1
alternate download link 2
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note:
-- If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Note 2:
-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs
-------------------------------

Then follow it up with DR. Web CureIt


Please download Dr.Web CureIt, the free version & 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 launch.exe to open the program and click Start. (There is no need to update if you just downloaded the most current version
  • Read the Virus check by DrWeb scanner prompt and click Ok where asked to Start scan now? Allow the setup.exe to load if asked by any of your security programs.
  • The Express scan will automatically begin.
    (This is a short scan of files currently running in memory, boot sectors, and targeted folders).
  • If prompted to dowload the Full version Free Trial, ignore and click the X to close the window.
  • If an infected object is found, you will be prompted to move anything that cannot be cured. Click Yes to All.
  • When complete, click Select All, then choose Cure > Move incurable.
    (This will move any detected files to the C:\Documents and Settings\userprofile\DoctorWeb\Quarantine folder if they can't be cured)
  • Now put a check next to Complete scan to scan all local disks and removable media.
  • In the top menu, click Settings > Change settings, and UNcheck "Heuristic analysis" under the "Scanning" tab, then click Ok.
  • Back at the main window, click the green arrow "Start Scanning" button on the right under the Dr.Web logo.
  • When the scan is complete, a message will be displayed at the bottom indicating if any viruses were found.
  • Click "Yes to all" if asked to cure or move the file(s) and select "Move incurable".
  • In the top menu, click file and choose save report list.
  • Save the DrWeb.csv report to your desktop.
  • 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. (You can use Notepad to open the DrWeb.cvs report)

Mark
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#3 Lemminkäinen

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Posted 12 July 2009 - 11:31 PM

Thank you so much for getting on the case!

Unfortunately, the Dr.Web CureIt ftp-download server seems to be down :thumbsup:

Edit: OK, managed to download it. Will follow your instructions after I get home from work. Thank you again, for the assistance!

Edited by Lemminkäinen, 13 July 2009 - 01:21 AM.


#4 Lemminkäinen

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Posted 13 July 2009 - 03:06 PM

OK, I followed the steps.

The MBAM log is as follows (unfortunately in Finnish as I didn't realize that it would make the logs in the same language as my operating system):

----

Malwarebytes' Anti-Malware 1.38
Tietokantaversio: 2419
Windows 5.1.2600 Service Pack 3

13.7.2009 18:18:50
mbam-log-2009-07-13 (18-18-50).txt

Tarkistustyyppi: Pikatarkistus
Tarkistetut kohteet: 85965
Kulunut aika: 2 minute(s), 55 second(s)

Saastuneita muistiprosesseja: 1
Saastuneita muistimoduuleja: 0
Saastuneita rekisteriavaimia: 12
Saastuneita rekisteriarvoja: 0
Saastuneita rekisterikohteita: 0
Saastuneita hakemistoja: 0
Saastuneita tiedostoja: 2

Saastuneita muistiprosesseja:
C:\Documents and Settings\Matias\Matias.exe (Trojan.Agent) -> Unloaded process successfully.

Saastuneita muistimoduuleja:
(Haitallisia kohteita ei löydetty)

Saastuneita rekisteriavaimia:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ksi32sk (Rootkit.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\amd64si (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ati64si (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\port135sik (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\securentm (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\acpi32 (Rootkit.Spamtool) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\i386si (Rootkit.Spamtool) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Systemntmi (Rootkit.Spamtool) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\ws2_32sik (Rootkit.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\nicsk32 (Rootkit.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\netsik (Rootkit.Agent) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\fips32cup (Rootkit.Agent) -> Quarantined and deleted successfully.

Saastuneita rekisteriarvoja:
(Haitallisia kohteita ei löydetty)

Saastuneita rekisterikohteita:
(Haitallisia kohteita ei löydetty)

Saastuneita hakemistoja:
(Haitallisia kohteita ei löydetty)

Saastuneita tiedostoja:
c:\documents and settings\Matias\Matias.exe (Trojan.Agent) -> Delete on reboot.
c:\documents and settings\Matias\Local Settings\Temp\BN9.tmp (Trojan.Agent) -> Quarantined and deleted successfully.

----

It looks pretty uniform but if you need something translated, don't hesitate to ask. "muisti" means memory, "avain" means key and "tiedosto" means file.

As for the Dr.Web CureIt log, it's as follows:

----

ati64si.sys;C:\WINDOWS\system32\drivers;Trojan.DownLoad.38180;Deleted.;

----

After rebooting from the safe mode my comp went into CHKDSK and fixed some files and indices.

Now everything seems to be working (there haven't been virus findings) *knocks on wood*

Huge thanks for the help!

#5 garmanma

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Posted 13 July 2009 - 07:22 PM

Just to be on the safe side

Update mbam and run a FULL scan
Please post the results
Mark
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Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around
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#6 Lemminkäinen

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Posted 14 July 2009 - 01:37 AM

OK, ran the MBAM again with a full scan and got one more that also gave an alarm through AVG:

----

Malwarebytes' Anti-Malware 1.39
Database version: 2421
Windows 5.1.2600 Service Pack 3

14.7.2009 9:22:17
mbam-log-2009-07-14 (09-22-17).txt

Scan type: Full Scan (C:\|E:\|)
Objects scanned: 276292
Time elapsed: 1 hour(s), 11 minute(s), 29 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 1

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
c:\system volume information\_restore{66896b29-b0b8-4f11-aa0b-5c4da3e7db16}\rp446\A0065822.sys (Rootkit.Agent) -> Quarantined and deleted successfully.

----

Rebooted and decided to run the full scan one more time just to see if that particular thingy has really been cleaned.

Edit: the new scan was done and came up empty. There haven't been further alerts from the anti-virus, so at least the situation is much improved from the original.

Edited by Lemminkäinen, 14 July 2009 - 02:56 AM.


#7 garmanma

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Posted 14 July 2009 - 07:26 PM

That infected file is in System Restore

If there are no longer signs of malware then please....

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"
  • Disk Cleanup will scan your files for several minutes, then open.
  • Click the "More Options" Tab.
  • Click the "Clean up" button under System Restore.
  • Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
  • Click Yes, then click Ok.
  • Click Yes again when prompted with "Are you sure you want to perform these actions?"
  • Disk Cleanup will remove the files and close automatically.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.
Mark
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why won't my laptop work?

Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around
Do not send me PMs with problems that should be posted in the forums. Keep it in the forums, so everyone benefits
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#8 Lemminkäinen

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Posted 15 July 2009 - 11:46 AM

OK, no further findings or problems, so did that restore point.

A very, very big thank you for all your help! Very much appreciated - you guys rock really a lot :thumbsup:

Edited by Lemminkäinen, 15 July 2009 - 11:47 AM.


#9 garmanma

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Posted 15 July 2009 - 05:39 PM

Glad to have helped
Mark
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why won't my laptop work?

Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around
Do not send me PMs with problems that should be posted in the forums. Keep it in the forums, so everyone benefits
Become a BleepingComputer fan: Facebook and Twitter




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