Trojan.Agent

MBAM detected Trojan.Agent in one of my Registry keys, HKEY_CLASSES_ROOT\PotDll.PotGo, and I've tried to remove it several times but it reappears after each restart. There are no errors or anything but I would still like to remove this Trojan even if it has not done anything harmful yet.

Hello and welcome.. Please post that MBAM log.

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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.


Next run ATF and SAS: If you cannot access Safe Mode,run in normal ,but let me know.

Note: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

From your regular user account..
Download Attribune's ATF Cleaner and then SUPERAntiSpyware , Free Home Version. Save both to desktop ..
DO NOT run yet.
Open SUPER from icon and install and Update it
Under Scanner Options make sure the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining.
Click the "Close" button to leave the control center screen and exit the program. DO NOT run yet.

Now reboot into Safe Mode: How to enter safe mode(XP)
Using the F8 Method
Restart your computer.
When the machine first starts again it will generally list some equipment that is installed in your machine, amount of memory, hard drives installed etc. At this point you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu.
Select the option for Safe Mode using the arrow keys.
Then press enter on your keyboard to boot into 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 or Opera browser click that browser 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.

NOW Scan with SUPER
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.
Perform a Complete scan. After scan,Verify they are all checked.
Click OK on the summary screen to quarantine all found items.
If asked if you want to reboot, click "Yes" and reboot normally.

To retrieve the removal information after reboot, launch SUPERAntispyware again.
Click Preferences, then click the Statistics/Logs tab.
Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
If there are several logs, click the current dated log and press View log.
A text file will open in your default text editor.
Please copy and paste the Scan Log results in your next reply.
Click Close to exit the program.


Rerun MBAM (MalwareBytes) like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select Quick scan and scan (normal mode).
After scan click Remove Selected, Post new scan log and Reboot into normal mode.


Please ask any needed questions,post logs and Let us know how the PC is running now.

Here are the logs, sorry about the late reply but I had exams:
Malwarebytes' Anti-Malware 1.45
www.malwarebytes.org

Database version: 4049

Windows 5.1.2600 Service Pack 2
Internet Explorer 6.0.2900.2180

4/28/2010 5:41:34 PM
mbam-log-2010-04-28 (17-41-34).txt

Scan type: Quick scan
Objects scanned: 142253
Time elapsed: 4 minute(s), 2 second(s)

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

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\PotDll.PotGo (Trojan.Agent) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 04/28/2010 at 06:00 PM

Application Version : 4.35.1002

Core Rules Database Version : 4849
Trace Rules Database Version: 2661

Scan type : Complete Scan
Total Scan Time : 01:00:42

Memory items scanned : 206
Memory threats detected : 0
Registry items scanned : 5103
Registry threats detected : 0
File items scanned : 41950
File threats detected : 0

Hello, between your replies,I went on vacation. If you still need help....

Rerun MBAM (MalwareBytes) like this:

Open MBAM in normal mode and click Update tab, select Check for Updates,when done
click Scanner tab,select Quick scan and scan (normal mode).
After scan click Remove Selected, Post new scan log and Reboot into normal mode.


How are things now?

Welcome back and hope your vacation was great. During the delay, I was infected with some other malware but MBAM removed it and somehow the Trojan.Agent doesn't come back anymore.

This is the most recent log:

Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4084

Windows 5.1.2600 Service Pack 2
Internet Explorer 6.0.2900.2180

5/9/2010 9:29:10 PM
mbam-log-2010-05-09 (21-29-10).txt

Scan type: Quick scan
Objects scanned: 153860
Time elapsed: 3 minute(s), 57 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: 0

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:
(No malicious items detected)

And this is the log that removed the other malware:

Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4058

Windows 5.1.2600 Service Pack 2
Internet Explorer 6.0.2900.2180

5/1/2010 9:56:44 PM
mbam-log-2010-05-01 (21-56-44).txt

Scan type: Quick scan
Objects scanned: 152514
Time elapsed: 5 minute(s), 13 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 5
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\avsuite (Rogue.AntivirusSuite) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\avsuite (Rogue.AntivirusSuite) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\avsoft (Trojan.Fraudpack) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\PotDll.PotGo (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\Software\avsoft (Trojan.Fraudpack) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

Hello,yes I had a nice time,thanks. This looks good. We should do one more scan(an online) to see if there may be something. I have to go now but will look back tomorrow.

ESET
Please perform a scan with Eset Online Antiivirus Scanner.
(Requires Internet Explorer to work. If given the option, choose "Quarantine" instead of delete.)
Vista users need to run Internet Explorer as Administrator. Right-click on the IE icon in the Start Menu or Quick Launch Bar on the Taskbar and select Run as Administrator from the context menu.

• Click the green ESET Online Scanner button.
• Read the End User License Agreement and check the box: YES, I accept the Terms of Use.
• Click on the Start button next to it.
• You may receive an alert on the address bar that "This site might require the following ActiveX control...Click here to install...". Click on that alert and then click Insall ActiveX component.
• A new window will appear asking "Do you want to install this software?"".
• Answer Yes to download and install the ActiveX controls that allows the scan to run.
• Click Start.
• Check Remove found threats and Scan potentially unwanted applications.
• Click Scan to start. (please be patient as the scan could take some time to complete)
• If offered the option to get information or buy software. Just close the window.
• When the scan has finished, a log.txt file will be created and automatically saved in the C:\Program Files\ESET\ESET Online Scanner\log.txt
  folder.
• Click > Run..., then copy and paste this command into the open box: C:\Program Files\EsetOnlineScanner\log.txt
• The scan results will open in Notepad. Copy and paste the contents of log.txt in your next reply.

Note: Some online scanners will detect existing anti-virus software and refuse to cooperate. You may have to disable the real-time protection components of your existing anti-virus and try running the scan again. If you do this, remember to turn them back on after you are finished.

ESETSmartInstaller@High as CAB hook log:
OnlineScanner.ocx - registred OK
# version=7
# iexplore.exe=6.00.2900.2180 (xpsp_sp2_rtm.040803-2158)
# OnlineScanner.ocx=1.0.0.6211
# api_version=3.0.2
# EOSSerial=12d3c3d054c2524a9f289ecdd2a70164
# end=finished
# remove_checked=true
# archives_checked=false
# unwanted_checked=true
# unsafe_checked=false
# antistealth_checked=true
# utc_time=2010-05-12 03:02:38
# local_time=2010-05-11 08:02:38 (-0800, Pacific Daylight Time)
# country="United States"
# lang=1033
# osver=5.1.2600 NT Service Pack 2
# compatibility_mode=512 16777215 100 0 22729295 22729295 0 0
# compatibility_mode=8192 67108863 100 0 0 0 0 0
# scanned=43645
# found=0
# cleaned=0
# scan_time=1907

Looks good here... If there are no other issues then...

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 backed up, renamed and 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, then 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 and Windows 7 users can refer to these links: Create a New Restore Point in Vista or Windows 7 and Disk Cleanup in Vista.

Thanks a lot for your help

You're welcome from all of us here at BC. We are glad to have helped.
Please take a few minutes to read our quietman7's excellent Tips to protect yourself against malware and reduce the potential for re-infection:,in post 17.