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Trojan.agent Infection


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#1 keetso

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Posted 11 September 2008 - 09:44 AM

Hello.

I recently was infected with a trojan that continuously (every 15 seconds or so) delivered a pop up box telling me that I was infected with a myriad of (non-existent) viruses. After finding this fine page, I downloaded and ran Malwarebyte's Anti-Malware program which seems to have eliminated the annoying popups.

However, I'm now regularly receiving the following message:

Windows Security Alert
Warning: Your current Antivirus protection is not effective
Your system is currently sending private information and documents to a remote computer.
One of these processes (xsearch.dll) has just sent the following information
- windows/system32

After rerunning Malwarebyte, it tells me that I have two instances of "Trojan.Agent".

Please help as I'm at my wit's end as to what to do next.

Thanks in advance!

Mark

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#2 quietman7

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Posted 11 September 2008 - 09:49 AM

Please post the results of your MBAM scan for review.

To retrieve the MBAM scan log information, launch MBAB.
Click the Logs Tab at the top.
mbam-log-7-18-2008(09-52-04).txt should show in the list. <- your dates will be different from this exampe
Click on the log name to highlight it.
Go to the bottom and click on Open.
The log should automatically open in notepad as a text file.
Go to Edit and choose Select all.
Go back to Edit and choose Copy or right-click on the highlighted text and choose copy from there.
Come back to this thread, click Add Reply, then right-click and choose Paste.
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#3 keetso

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Posted 11 September 2008 - 10:01 AM

Thank you for your fast(!) reply, quietman7. It's much appreciated.

I've posted the log of the MBAM scan as requested.


Malwarebytes' Anti-Malware 1.26
Database version: 1116
Windows 5.1.2600 Service Pack 3

2008-09-11 10:42:27
mbam-log-2008-09-11 (10-42-27).txt

Scan type: Quick Scan
Objects scanned: 56637
Time elapsed: 4 minute(s), 54 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 2
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:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

#4 quietman7

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Posted 11 September 2008 - 10:21 AM

Your MBAM log indicates you are using an older version of MBAM with an outdated database. Please download and install the most current version of MBAM from here. Afterwards, if you encounter any problems while downloading the database updates, manually download the updates and just double-click on mbam-rules.exe to install.

Perform a new Quick Scan in normal mode and check all items found for removal. Don't forgot to reboot afterwards. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. When done, click the Logs tab and copy/paste the contents of the new report in your next reply.
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#5 keetso

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Posted 11 September 2008 - 10:47 AM

Thanks for the heads up. I updated MBAM and updated the database.

Here's the results of the new scan:


Malwarebytes' Anti-Malware 1.28
Database version: 1141
Windows 5.1.2600 Service Pack 3

2008-09-11 11:38:53
mbam-log-2008-09-11 (11-38-53).txt

Scan type: Quick Scan
Objects scanned: 58009
Time elapsed: 4 minute(s), 54 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 3
Folders Infected: 0
Files Infected: 6

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:
HKEY_CLASSES_ROOT\scrfile\shell\open\command\ (Broken.OpenCommand) -> Bad: ("%1" %*) Good: ("%1" /S) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\Documents and Settings\msarazen\Local Settings\Temp\b.exe.bak (Trojan.FakeAlert) -> Quarantined and deleted successfully.
C:\Documents and Settings\msarazen\Local Settings\Temp\c.exe (Trojan.FakeAlert) -> Quarantined and deleted successfully.
C:\Program Files\SAV\sav.ooo (Rogue.SystemAntivirus) -> Quarantined and deleted successfully.
C:\Documents and Settings\Administrator\Local Settings\Temp\ntdll64.dll (Trojan.FakeAlert) -> Delete on reboot.
C:\WINDOWS\Temp\ntdll64.dll (Trojan.FakeAlert) -> Quarantined and deleted successfully.
C:\Documents and Settings\msarazen\Local Settings\Temp\ntdll64.dll (Trojan.FakeAlert) -> Quarantined and deleted successfully.

#6 quietman7

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Posted 11 September 2008 - 10:52 AM

Rescan again with MBAM (Quick Scan) in normal mode and check all items found for removal. Don't forgot to reboot afterwards. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. When done, click the Logs tab and copy/paste the contents of the new report in your next reply.

Please download ATF Cleaner by Atribune & save it to your desktop. alternate download link DO NOT use yet.
Please download and install SUPERAntiSpyware Free
  • Double-click SUPERAntiSypware.exe and use the default settings for installation.
  • An icon will be created on your desktop. Double-click that icon to launch the program.
  • If asked to update the program definitions, click "Yes". If not, update the definitions before scanning by selecting "Check for Updates". (If you encounter any problems while downloading the updates, manually download them from here and unzip into the program's folder.)
  • In the Main Menu, click the Preferences... button.
  • Click the "General and Startup" tab, and under Start-up Options, make sure "Start SUPERAntiSpyware when Windows starts" box is unchecked.
  • Click the "Scanning Control" tab, and 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 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".

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 SUPERAntiSpyware as follows:
  • Launch the program and back on the main screen, under "Scan for Harmful Software" click Scan your computer.
  • On the left, make sure you check C:\Fixed Drive.
  • On the right, under "Complete Scan", choose Perform Complete Scan and click "Next".
  • After the scan is complete, a Scan Summary box will appear with potentially harmful items that were detected. Click "OK".
  • Make sure everything has a checkmark next to it and click "Next".
  • A notification will appear that "Quarantine and Removal is Complete". Click "OK" and then click the "Finish" button to return to the main menu.
  • 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.

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#7 keetso

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Posted 11 September 2008 - 10:53 AM

Please accept my apologies for being an idiot. I'm not overly technically savvy.

After posting this log, I realized that I should've run a new scan after the reboot and post THAT log.

Here it is:


Malwarebytes' Anti-Malware 1.28
Database version: 1141
Windows 5.1.2600 Service Pack 3

2008-09-11 11:53:04
mbam-log-2008-09-11 (11-52-56).txt

Scan type: Quick Scan
Objects scanned: 57801
Time elapsed: 4 minute(s), 59 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 2
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:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> No action taken.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> No action taken.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

#8 quietman7

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Posted 11 September 2008 - 11:02 AM

Your MBAM log shows "No action taken". This usually occurs if you forget to click "Remove Selected" and instead just click "Save Logfile". Please review these instructions (scroll down), rescan again (Quick Scan) in normal mode and check all items found for removal. Don't forgot to reboot afterwards. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. After performing a new scan, click the Logs tab and copy/paste the contents of the new report in your next reply.
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#9 keetso

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Posted 11 September 2008 - 12:55 PM

Here're the logs for both MBAM and SUPERAntiSpyware Scan Log.

--------------------------

Malwarebytes' Anti-Malware 1.28
Database version: 1141
Windows 5.1.2600 Service Pack 3

2008-09-11 12:31:40
mbam-log-2008-09-11 (12-31-40).txt

Scan type: Quick Scan
Objects scanned: 55755
Time elapsed: 4 minute(s), 42 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 2
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:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

-----------------------


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

Generated 09/11/2008 at 01:28 PM

Application Version : 4.21.1004

Core Rules Database Version : 3563
Trace Rules Database Version: 1551

Scan type : Complete Scan
Total Scan Time : 00:46:44

Memory items scanned : 246
Memory threats detected : 0
Registry items scanned : 7012
Registry threats detected : 1
File items scanned : 79729
File threats detected : 3

Trojan.DNSChanger-Codec
HKU\S-1-5-21-2116825684-2010480077-1094980219-36642\Software\uninstall

Rogue.System AntiVirus 2008
C:\Program Files\SAV

Trojan.Dropper/Gen
C:\WINDOWS\SYSTEM32\JSNWZMTK.EXE
C:\WINDOWS\SYSTEM32\VQPGRYXU.EXE

#10 quietman7

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Posted 11 September 2008 - 01:03 PM

How is your computer running now? Any more reports/signs of infection?
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#11 keetso

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Posted 11 September 2008 - 02:35 PM

It seemed to be working ok for longer than normal but that annoying, "Warning: Your Current Antivirus Protection Is Not Effective!" screen just popped up again (actually 2 of them that are exactly the same.

The MBAM scan still shows the infection is present.


Malwarebytes' Anti-Malware 1.28
Database version: 1141
Windows 5.1.2600 Service Pack 3

2008-09-11 15:28:42
mbam-log-2008-09-11 (15-28-42).txt

Scan type: Quick Scan
Objects scanned: 55709
Time elapsed: 4 minute(s), 14 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 2
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:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: c:\windows\system32\userinit.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Agent) -> Data: system32\userinit.exe -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

#12 quietman7

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Posted 11 September 2008 - 02:39 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 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 9 there are instructions for downloading the HijackThis Installer and creating a log. This is an automatic setup version which will install the program in the proper location.

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 HJT log in the thread titled "Haven't Had A Reply In Five Days?".
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#13 keetso

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Posted 11 September 2008 - 02:44 PM

Will do.

Thanks again for your help.

It's been much appreciated.

Mark

#14 quietman7

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Posted 12 September 2008 - 08:11 AM

You're welcome.
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