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Laptop infected with Trojan:Win32/AgentBypass.gen!K


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7 replies to this topic

#1 christos4487

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Posted 06 January 2009 - 05:48 PM

Hi,

My Windows Defender picked up that I have a Trojan:Win32/AgentBypass.gen!K Trojan and allows me to remove it. However, whenever I restart Windows XP, the warning message returns. From what I have researched, it is a backroom trojan that reinstalls itself whenever Windows Explorer restarts. My laptop has shown no other symptoms so far.

I have Norton Internet Security 2008 (most up to date version), and it has not been picked up by this. I use no other spyware software.

Could someone possible give me guidance on the best way to remove it?

Many thanks!

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#2 ItWouldRuin

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Posted 06 January 2009 - 06:05 PM

I could be wrong, but I think that you have a memory-resident backdoor on your computer.

5y2q4tqx.dll
2j.dll
5mvkn.dll
vkq.dll
Do you have any of these files in your computer?

#3 Tehsplink

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Posted 06 January 2009 - 06:10 PM

Please download MalwareBytes Anti-Malware to your desktop.


1.Ensure that your computer is connected to the internet and your software firewall is disabled until instructed to re-enable it.
2.Double click on the mbam-setup.exe to begin the installation process.
3.When the installation begins, please do not change any of the settings and follow the prompts.
4.Please make sure that when you finish the installation, these options remain checked;
5. *Update MalwareBytes' Anti-Malware
6. *Launch MalwareBytes' Anti-Malware
7.You may now click finish...
8.When MBAM launches, you will be prompted to update before running a scan. If an update is found, MBAM will automatically download and apply the updates and you can then click 'OK' button to close the box and continue. You may now re-enable your firewall
9.Please ensure that while you are on the scanner tab the 'Perform Quick Scan' option is selected, then click the 'Scan' button.
10.If you are asked which drives to scan, please leave all of them ticked, and click 'Start Scan'.
11.The scan will now begin and you will see “Scan in progress” at the top; It may take a while to complete so please be patient.
12.When the scan completes, you will see “The scan completed successfully. Click 'Show Results' to display all objects found”
13.Click the 'OK' button to close the box and continue with the removal process.
14.Back on the main scanner screen, click 'Show Results' to see a list of any found Malware.
15.Ensure that all items are checked and then click the 'Remove Selected' button.
16.When the removal process is complete, a log will open in notepad; this log will be automatically saved and you can view it in the logs section of the program.
17.Copy and paste the contents of the log file that is open into 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. MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes, they may alert you after scanning with MBAM. Please permit the program to allow the changes.
Please PM me if i have been assisting you and do not reply for 24 hours!

#4 christos4487

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Posted 07 January 2009 - 09:57 AM

Hi, I ran the scan.

Here is my log for the quick scan:

Malwarebytes' Anti-Malware 1.32
Database version: 1627
Windows 5.1.2600 Service Pack 3

07/01/2009 10:18:30
mbam-log-2009-01-07 (10-18-30).txt

Scan type: Quick Scan
Objects scanned: 69250
Time elapsed: 15 minute(s), 3 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:\Documents and Settings\Chris Turner\results.txt (Malware.Trace) -> Quarantined and deleted successfully.


This has not solved the problem, as the trojan is still recognised whenever I restart my laptop. Any more ideas? Thanks.

#5 Tehsplink

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Posted 07 January 2009 - 10:04 AM

Okay, you will probably still be infected...



Please download and install Super Anti Spyware


1.Double click SUPERAntiSypware.exe and use the default settings for installation
2.When the installation finishes a shortcut on your desktop will be created, please double click that to launch SAS
3.If asked to update the programs definitions please click Yes . If not then update the definitions before scanning by clicking Check for Updates
4.Under the Configuration and Preferences, click the Preferences button
5.Click the General and startup tab, and under Start-Up Options, make sure Start SUPERAntiSpyware when windows starts is Unchecked.
6.Click the "Scanning Control" tab, and under Scanner
Options make sure the that the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining.
7.Click the Close button to leave the control center screen and exit the program.
8.Do not run a scan just 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 SUPERAntiSpyware once in safe mode using the instructions below:
1.Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
2.On the left, make sure you check C:\Fixed Drive.
3.On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
4.After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
5.Make sure everything has a checkmark next to it and click "Next".
6.A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
7.If asked if you want to reboot, click "Yes" and reboot normally.
8.To retrieve the removal information after reboot, launch SUPERAntispyware again.
1.Click Preferences, then click the Statistics/Logs tab.
2.Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
3.If there are several logs, click the current dated log and press View log. A text file will open in your default text editor.
4.Please copy and paste the Scan Log results in your next reply.
9.Click Close to exit the program.
Please PM me if i have been assisting you and do not reply for 24 hours!

#6 quietman7

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Posted 07 January 2009 - 10:36 AM

After scanning with SAS, please print out and follow these instructions: "How to use SDFix". <- for Windows 2000/XP ONLY!
When using this tool, you must use the Administrator's account or an account with "Administrative rights"
  • Disconnect from the Internet and temporarily disable your anti-virus, script blocking and any real time protection programs before performing a scan.
  • Please be patient as the scan may take up to 20 minutes to complete.
  • When the process is complete, the SDFix report log will open in Notepad and automatically be saved in the SDFix folder as Report.txt.
  • If SDFix is unable to run after rebooting from Safe Mode, run SDFix in either Mode, and type F, then press Enter for it to finish the final stage and produce the report.
  • The SDFix report log (Report.txt) will open in Notepad and automatically be saved in the SDFix folder.
  • Please copy and paste the contents of Report.txt in your next reply.
  • Be sure to re-enable you anti-virus and and other security programs before connecting to the Internet.

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#7 christos4487

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Posted 07 January 2009 - 03:30 PM

Here is my SAS log. The trojan still has not been removed:

Generated 01/07/2009 at 08:02 PM

Application Version : 4.24.1004

Core Rules Database Version : 3698
Trace Rules Database Version: 1674

Scan type : Complete Scan
Total Scan Time : 04:13:48

Memory items scanned : 171
Memory threats detected : 0
Registry items scanned : 7589
Registry threats detected : 0
File items scanned : 131990
File threats detected : 18

Adware.Tracking Cookie
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@revsci[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@content.yieldmanager.edgesuite[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@revenue[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@uk.at.atwola[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@ads.bleepingcomputer[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@content.yieldmanager[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@2o7[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@atwola[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@casalemedia[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@ad.yieldmanager[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@aoluk.122.2o7[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@apmebf[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@questionmarket[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@bluestreak[1].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@tacoda[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@at.atwola[2].txt
C:\Documents and Settings\Chris Turner\Cookies\chris_turner@content.yieldmanager[3].txt

Trojan.Security Toolbar
C:\Documents and Settings\Chris Turner\Favorites\Antivirus Test Online.url

#8 quietman7

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Posted 07 January 2009 - 03:39 PM

Some infections are difficult to remove completely because of their morphing characteristics which allows the malware to regenerate itself. Sometimes there is a hidden piece of malware which has not been detected that protects files (which have been detected) and registry keys so they cannot be permanently deleted. Disinfection will probably require the use of more powerful tools than we recommend in this forum. Before that can be done you will need you to create and post a DDS/HijackThis log for further investigation.

Please read the pinned topic titled "Preparation Guide For Use Before Posting A Hijackthis Log". If you cannot complete a step, then skip it and continue with the next. In Step 6 there are instructions for downloading and running DDS which will create a Pseudo HJT Report as part of its log.

When you have done that, post your log in the HijackThis Logs and Malware Removal forum, NOT here, for assistance by the HJT Team Experts. A member of the Team will walk you through, step by step, on how to clean your computer. If you post your log back in this thread, the response from the HJT Team will be delayed because your post will have to be moved. This means it will fall in line behind any others posted that same day.

Start a new topic, give it a relevant title and post your log along with a brief description of your problem, a summary of any anti-malware tools you have used and a summary of any steps that you have performed on your own. An expert will analyze your log and reply with instructions advising you what to fix. After doing this, we would appreciate if you post a link to your log back here so we know that your getting help from the HJT Team.

Please be patient. It may take a while to get a response because the HJT Team members are very busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT "bump" your post or make another reply until it has been responded to by a member of the HJT Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another HJT Team member is already assisting you and not open the thread to respond.

If after 5 days you still have received no response, then post a link to your log in the thread titled "Post in this thread when you haven't received an answer in five days.".
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