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Zlob.N type infection


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#1 webrat

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Posted 25 November 2008 - 07:47 AM

Hey folks,

I'm currently trying to fix my girlfriends laptop as it was hit by a variant of the above. As far as I can tell the initial entry was gained through a prompt to update the flash player on a popular social networking site. Initial symptoms included a host of pop-ups and warnings (clearly false/suspect - this checks out against my PC's antivirus product database) and a browser hijack. I have run Spybot and Malwarebytes which has removed upwards of 30 infected files, many of which were Zlob related (I have a log of the initial quickscan and can post it if useful)



However, I'm still getting prompts from Spybot that something is trying to redirect the homepage from google to about:blank and it has a very suspect toolbar installed which cannot be removed through a regular uninstall process. When an uninstall is attempted it prompts for an immediate restart prior to uninstallation. This strikes me as odd so I have not tried it yet.

Any thoughts on this would be much appreciated.

Cheers

BC AdBot (Login to Remove)

 


#2 quietman7

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Posted 25 November 2008 - 12:02 PM

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-2008-10-12(13-35-16).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 webrat

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Posted 26 November 2008 - 06:18 AM

Hey quietman7,

Thanks for getting back to me. I've run Malwarebytes 4 times. Each time it picks up less threats but they are still present. As a secondary idea I installed Norton on the laptop to get a 'second opinion' and that is reporting a Hacktool Rootkit - no surprise given the number of files Malwarebytes has found/is finding. I'll post the Malware logs. A further problem is that it is an office laptop with a fairly convoluted login process - Have not yet figured out how to start it in safe mode should I need to. Basically I need to fix this at home if at all possible......



First log:

Malwarebytes' Anti-Malware 1.30
Database version: 1306
Windows 5.1.2600 Service Pack 3

25/11/2008 12:01:17
mbam-log-2008-11-25 (12-01-17).txt

Scan type: Quick Scan
Objects scanned: 69072
Time elapsed: 9 minute(s), 21 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 11
Registry Values Infected: 1
Registry Data Items Infected: 1
Folders Infected: 0
Files Infected: 4

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\Interface\{cf54be1c-9359-4395-8533-1657cf209cfe} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{9afb8248-617f-460d-9366-d71cdeda3179} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Typelib\{d518921a-4a03-425e-9873-b9a71756821e} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{59c7fc09-1c83-4648-b3e6-003d2bbc7481} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{68af847f-6e91-45dd-9b68-d6a12c30e5d7} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{9170b96c-28d4-4626-8358-27e6caeef907} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{d1a71fa0-ff48-48dd-9b6d-7a13a3e42127} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{ddb1968e-ead6-40fd-8dae-ff14757f60c7} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{f138d901-86f0-4383-99b6-9cdd406036da} (Adware.MyWebSearch) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\RunDll32Policy\f3ScrCtr.dll (Adware.MyWay) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Multimedia\WMPlayer\Schemes\f3pss (Adware.MyWebSearch) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\sysftray2 (Trojan.Agent) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_CLASSES_ROOT\scrfile\shell\open\command\ (Broken.OpenCommand) -> Bad: ("C:\Program Files\Internet Explorer\Iexplore.exe" %1) Good: ("%1" /S) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINDOWS\fmark2.dat (Malware.Trace) -> Quarantined and deleted successfully.
C:\Documents and Settings\anna\My Documents\My Pictures\My Pictures.url (Trojan.Zlob) -> Delete on reboot.
C:\Documents and Settings\All Users\Start Menu\Antivirus Scan.url (Trojan.Zlob) -> Quarantined and deleted successfully.
C:\Documents and Settings\All Users\Desktop\Antivirus Scan.url (Rogue.Link) -> Quarantined and deleted successfully.


Second Log - Full scan


Malwarebytes' Anti-Malware 1.30
Database version: 1306
Windows 5.1.2600 Service Pack 3

25/11/2008 13:26:49
mbam-log-2008-11-25 (13-26-15).txt

Scan type: Full Scan (C:\|D:\|)
Objects scanned: 141079
Time elapsed: 56 minute(s), 25 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: 2

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\CLSID\{c39e6b6e-7e2a-43ff-8ec4-6731ed3b9d47} (Trojan.BHO) -> No action taken.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\WINDOWS\system32\601325\601325.dll (Trojan.BHO) -> No action taken.
C:\Documents and Settings\anna\My Documents\My Pictures\My Pictures.url (Trojan.Zlob) -> No action taken.



Third log - Full scan

Malwarebytes' Anti-Malware 1.30
Database version: 1306
Windows 5.1.2600 Service Pack 3

25/11/2008 13:26:55
mbam-log-2008-11-25 (13-26-55).txt

Scan type: Full Scan (C:\|D:\|)
Objects scanned: 141079
Time elapsed: 56 minute(s), 25 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: 2

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\CLSID\{c39e6b6e-7e2a-43ff-8ec4-6731ed3b9d47} (Trojan.BHO) -> 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:
C:\WINDOWS\system32\601325\601325.dll (Trojan.BHO) -> Quarantined and deleted successfully.
C:\Documents and Settings\anna\My Documents\My Pictures\My Pictures.url (Trojan.Zlob) -> Delete on reboot.

Fourth log - Full Scan

Malwarebytes' Anti-Malware 1.30
Database version: 1422
Windows 5.1.2600 Service Pack 3

25/11/2008 22:36:25
mbam-log-2008-11-25 (22-36-25).txt

Scan type: Full Scan (C:\|D:\|)
Objects scanned: 140799
Time elapsed: 1 hour(s), 50 minute(s), 50 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\anna\My Documents\My Pictures\My Pictures.url (Trojan.Zlob) -> Delete on reboot.




As far as I know that last file was in fact deleted on reboot but I was still noticing some odd occurences and behaviours - problems with network and internet access/navigation which had not occured before the incident, at that point I installed Norton and ran it with the rootkit result mentioned. Norton was not able to resolve that issue.

As ever, any thoughts would be greatly appreciated

Cheers

Jason

#4 quietman7

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Posted 26 November 2008 - 01:12 PM

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.
Please download ATF Cleaner by Atribune & save it to your desktop. DO NOT use yet.
alternate download link

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. Double-click on the hyperlink for Download Installer and save SASDEFINITIONS.EXE to your desktop. Then double-click on SASDEFINITIONS.EXE to install the definitions.)
  • 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.

Edited by garmanma, 27 November 2008 - 02:51 PM.

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#5 webrat

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Posted 27 November 2008 - 08:17 AM

Hey quietman7,

I ran both the apps as instructed and they came up completely clean!

I then investigated the rootkit alert a bit more and located it to a .msi file. After uninstalling the associated app the alert dissapeared so I'm guessing it's a false-positive. I ran everything once more and still no sign of any issues. I can post the results if you think it's necessary but all signs indicate this one is solved.

Many, many thanks to the folks at bleepingcomputer.

Cheers,

Jason

#6 quietman7

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Posted 27 November 2008 - 08:43 AM

You're welcome.

If there are no more problems or signs of infection, 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". 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.
Tips to protect yourself against malware and reduce the potential for re-infection:
• "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 & Part 2".
• "IE Recommended Minimal Security Settings" - "How to Secure Your Web Browser".

• Avoid gaming sites, underground web pages, pirated software sites, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smφrgεsbord of malware infections, remote attacks, exposure of personal information, and identity theft. Many malicious worms and Trojans spread across P2P file sharing networks, gaming and underground sites. Users visiting such pages may see innocuous-looking banner ads containing code which can trigger pop-up ads and Flash ads that install viruses, Trojans and spyware. Ads are a target for hackers because they offer a stealthy way to distribute malware to a wide range of Internet users. The best way to reduce the risk of infection is to avoid these types of web sites and not use any P2P applications. Read P2P Software User Advisories and Risks of File-Sharing Technology.
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#7 webrat

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Posted 27 November 2008 - 02:15 PM

Thanks once again quietman7,

As luck would have it System Restore was turned off at the point of the attack. I've now turned it back on and created a new one just in case. The advice is sound and well worth observing. We were lucky as we have a network so I could fix the problem from a secure PC. I dread to think what would have happened had that not been the case.

Keep it up to date folks, or at least have a good think about how you are going to respond if it all goes pear shaped. :thumbsup:

#8 quietman7

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Posted 27 November 2008 - 10:08 PM

Safe surfing and have a malware free day.
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