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Zlob-like rogueware. Can't defeat it...


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#1 keviv

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Posted 07 December 2008 - 12:46 AM

Hey all,

Been having serious problems with my computer over the last 24 hours. First noticed it yesterday, when all of a sudden my computer randomly shut down and restarted. When it booted up and Windows started, I got a "Security Center" window telling me about a trojan (Zlob.G to be precise) that had been detected. I now think that window was fake (screenshot below), but either way, I didn't click anything on it, simply X'd out of it. Then, in both Firefox and IE, I would be taken directly to a page telling me that there was a virus, and asking if i wanted to continue unsecured, or get protection.

Posted Image

I don't think the problem is actually Zlob. I read up on Zlob, and I don't see the typical Zlob system processes in my windows Task Manager. It does sound like a similar TYPE of malware though. I don't think it's fully played out, since I never downloaded the fake anti-virus/spyware software. But now neither firefox nor IE will work. They crash on load. I can only go online in safe mode.

I have AVG Free 7.5 anti-virus and windows defender. Both were running at the time, and are up-to-date. I ran a complete scan with both. AVG found one trojan (not zlob, but i forget which), and removed it, but that didn't seem to fix it. Windows defender found nothing. McAfee Avert Stinger found nothing either. Next I downloaded and ran Ad-Aware, which found another DIFFERENT trojan. But that didn't seem to fix it either. Then tried installing Norton 2009 trial. The installation crashed. But even without the complete install, I'm able to get a full system scan going in safe mode. That's been running for an hour, but still hasn't found any viruses. We'll see how it goes.

Meanwhile, anyone have any clues what virus this actually is?? See the screenshot of the fake windows firewall message. Once I know what the damn actually is, I'm sure I'll be able to find a solution. Of course, if you have any advice on how to fix it, that would be much appreciated too!

Thanks!

-Kev

ps- Am running Windows XP Pro SP2 on a Lenovo laptop. 2.0ghz, 2gb ram.

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#2 Neel08

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Posted 07 December 2008 - 04:52 AM

Why u still use AVG 7.5 where there is version 8 available.

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:
o Update Malwarebytes' Anti-Malware
o 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. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
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. MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.

Hope it will detect the malware & remove it from your system.

#3 keviv

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Posted 07 December 2008 - 08:57 AM

Update: Norton AV 2009 with the latest updates did a full system scan overnight, and found nothing. nothing! aaaaargh.

Neel08, thanks for the reply. I will try that software. Any reason why I should do a "Quick Scan" instead of a regular/full scan?

Cheers,
-Kev

#4 keviv

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Posted 07 December 2008 - 10:07 AM

Sigh. MBAM found nothing either. I'm at a loss for what to do.

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

Malwarebytes' Anti-Malware 1.31
Database version: 1456
Windows 5.1.2600 Service Pack 2

12/7/2008 9:58:50 AM
mbam-log-2008-12-07 (09-58-50).txt

Scan type: Quick Scan
Objects scanned: 78312
Time elapsed: 14 minute(s), 4 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)

#5 Sherlock52

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Posted 07 December 2008 - 11:36 AM

I had the same problem. This is a well organized fraud to lead you to download "PerfectDefender2009" which is supposed to "Protect" your machine. Once downloaded, is "scans" your machine and prompts that it is infected with Trojan.zlob.G and several others. When you click "Remove" it prompts you to purchase a license, thus leading to stealing your credit card etc. Don't download!!!
If the message is the only symptom you have then goto (vista) c:\Users|<username>AppData\Roaming (I assume that on XP it would be c:\Documents and Settings\Application Data) and look in subfolders for exe files like losi.exe, xerox.exe, mermen.exe. and other wired names. Notice that all of them where created at the same date and time, probably sometimes yesterday. I simply deleted these files and the message is now gone. Not on restart and not otherwise. Also, I had an additional problem of all browsers and applications using browsers closing with an error. I renamed the dll and the exe files in the same location, subfolder Google - and the problem is gone.
FWIW

#6 Sherlock52

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Posted 07 December 2008 - 11:42 AM

Just one more thing: After deleting the files I did a cold boot - a complete shut down. Waited for 2 minutes and restarted.

#7 ruby1

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Posted 07 December 2008 - 11:53 AM

@keviv

I have AVG Free 7.5 anti-virus and windows defender. Both were running at the time, and are up-to-date. I ran a complete scan with both. AVG found one trojan (not zlob, but i forget which), and removed it, but that didn't seem to fix it. Windows defender found nothing. McAfee Avert Stinger found nothing either. Next I downloaded and ran Ad-Aware, which found another DIFFERENT trojan. But that didn't seem to fix it either. Then tried installing Norton 2009 trial. The installation crashed. But even without the complete install, I'm able to get a full system scan going in safe mode. That's been running for an hour, but still hasn't found any viruses. We'll see how it goes.


with respect; you should NOT have more than ONE installed antivirus program on the computer ; you WILL get clashes and infections ; I strongly advise you to REMOVE the Norton 'trial' as you already have the AVG 7.5 antivirus program installed and fully active

as Malawarebytes appears to have run clear maybe try this scan


Please download and scan with 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".

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.
try that?

#8 keviv

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Posted 07 December 2008 - 01:36 PM

hey guys,

thanks so much for the replies.

ruby1 -- don't worry, i uninstalled AVG before installing Norton. i'm not that clueless :thumbsup:

sherlock -- thanks for the suggestion. i will take a look there and see if i spot anything amiss. next i will try ruby's suggestion.

fyi: i also ran the kaspersky online scanner (with norton turned off, obviously), and had it scan the 'critical areas'. two hours later, it too has found nothing.

will keep you guys posted.

-kev

Edited by keviv, 07 December 2008 - 01:37 PM.


#9 Sherlock52

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Posted 07 December 2008 - 02:00 PM

I have tried Superantispyware, combofix and all the rest of them to no avail. Only removing the files did the trick.
Delete the files in safe mode. Also, the two files in the google sub folder, rename them or delete them anyway.

#10 keviv

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Posted 07 December 2008 - 02:44 PM

sherlock -- that worked! thank you so much. i am no longer seeing either of the two symptoms: the pop-up window, or firefox/ie crashing immediately.

but i wonder if part of the malware is still existant on my machine. those exe files had to be triggered by something -- either something in the startup or something else in windows. that "trigger" probably still exists, it just isn't able to find the EXE files, and so there's nothing happening. any thoughts?

otherwise, i think i'm going to back up all my documents now that my computer is functional, and go ahead and do a complete format, and re-install everything from scratch...

none of the virus scanners still sees anything, of course!

ruby - SUPERantispyware found nothing either. it was sherlock's fix that did the trick...

#11 Sherlock52

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Posted 07 December 2008 - 02:49 PM

You are welcome... :thumbsup:
I updated my AVG v.8.0 and ran a complete scan just to be on the safe side. I have it now to scan automatically every night, so we'll se tomorrow. I don't want to go through the hassle of formating and starting from scratch if I can avoid that.

#12 keviv

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Posted 07 December 2008 - 02:59 PM

okay. yeah, i'll watch my computer for a few days and see how it does, and then decide. i guess i'm just a little anal about this sorta stuff -- if i know there's something there, it'll keep bugging me!

thanks again, though! you're a life saver. how did you figure it out?? i can't find anything about it online.

#13 Sherlock52

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Posted 07 December 2008 - 03:22 PM

At first I checked the registry to find out if something was added to the start keys, and couldn't find any. Then I looked in the appdata folder, cause, as a programmer, I know what it is for and why its there. What caught my eye was the exact same date and time for all these files, which matched the time I first encountered the problem. But, stupid me, I did all that *after* I tried everything else.

#14 ruby1

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Posted 07 December 2008 - 04:05 PM

@sherlock 52

I have tried Superantispyware, combofix and all the rest of them to no avail. Only removing the files did the trick.
Delete the files in safe mode. Also, the two files in the google sub folder, rename them or delete them anyway.


I presume you are aware of

ComboFix is a tool that should only be run under the supervision of someone who has been trained in its use. Using it on your own can cause problems with your computer.


It is an extremely powerful tool and NOT actually intended for unsupervised use, so, if your computer suddenly decides to not obey you.........

#15 Sherlock52

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Posted 07 December 2008 - 04:25 PM

ruby. You are absolutely right. Combofix is not intended for laymen.




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