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xxxx.DLL is not a valid Windows image.


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#1 nitro459

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Posted 04 January 2011 - 06:31 PM

Hi. First post for me, so please be patient.

I am constantly getting the error message: "xxxxx.DLL is not a valid Windows image. Please check this against your installation diskette". This appears many times for various applications when the computer starts up, and whenever I open an application. Once I click 'OK', the message disappears and the application opens as usual.

I am running MS Windows XP Professional Version 2002, Service Pack 3.

I believe I have been infected by a Trojan Horse virus.

I have run a HijackThis scan and have the log, but have not posted it here as per Bleepingcomputer's advice.

Please advise on how to proceed - looks like Combofix is the answer but I am technically challenged so will need guidance.

Many thanks for your help.

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#2 boopme

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Posted 04 January 2011 - 10:00 PM

Hello, let's do these first. If needed I will ask for the HJT log. PLEASE do not run ComboFix on your own,note the blue text atop this forum.

Next run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware and save it to your desktop.
Download Link 1
Download Link 2MBAM 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. Temporarily disable such programs or permit them to allow the changes.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
    For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  • 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:
    • Update Malwarebytes' Anti-Malware
    • 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 definition updates, manually download them from here and just double-click on mbam-rules.exe to install.
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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Troubleshoot Malwarebytes' Anti-Malware


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 ..
Close all open browsers before using, especially FireFox. <-Important!!!
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.


Please ask any needed questions,post logs and Let us know how the PC is running now.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#3 nitro459

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Posted 06 January 2011 - 05:26 PM

Hi Boopme - thank you so much for your prompt and clear instructions. Sorry I didn't get back to you sooner but it took 9.5 hours to scan my computer!

I have followed all your instructions and the problem seems to be resolved. Seems I was infected with 'Trojan.Agent/Gen-Nullo[Micro]' in C:\PROGRAM FILES\GOOGLE\GOOGLE EARTH\GOEC62~1.DLL.

I have posted the logs below if required, but the infection seems to have gone. Any advice on how to prevent it happening again? I am running AVG anti-virus software, which clearly missed this infection.

Again, thank you so much for your help - much appreciated.


Malwarebytes log:
Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org

Database version: 5466

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

06/01/2011 10:48:05
mbam-log-2011-01-06 (10-48-05).txt

Scan type: Quick scan
Objects scanned: 175234
Time elapsed: 20 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: 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)


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

Generated 01/06/2011 at 09:00 PM

Application Version : 4.47.1000

Core Rules Database Version : 6138
Trace Rules Database Version: 3950

Scan type : Complete Scan
Total Scan Time : 09:32:54

Memory items scanned : 218
Memory threats detected : 0
Registry items scanned : 8791
Registry threats detected : 0
File items scanned : 84539
File threats detected : 59

Adware.Tracking Cookie
C:\Documents and Settings\Mat Shepherd\Cookies\mat_shepherd@atdmt[1].txt
C:\Documents and Settings\Mat Shepherd\Cookies\mat_shepherd@apmebf[1].txt
C:\Documents and Settings\Mat Shepherd\Cookies\mat_shepherd@mediaplex[1].txt
C:\Documents and Settings\Mat Shepherd\Cookies\mat_shepherd@revsci[2].txt
acvs.mediaonenetwork.net [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
atdmt.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
cdn1.eyewonder.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
content.oddcast.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
core.insightexpressai.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
ec.atdmt.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
ia.media-imdb.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
img-cdn.mediaplex.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
interclick.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
m.uk.2mdn.net [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
m1.emea.2mdn.net [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
media.cnetnetworks.com.au [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
media.mtvnservices.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
media.scanscout.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
media.tattomedia.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
media.worldgolftour.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
media5.wgt.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
mediabank.lexmark-europe.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
oddcast.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
rmd.atdmt.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
spe.atdmt.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
stat.easydate.biz [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
static.2mdn.net [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
uk.2mdn.net [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
www.naiadsystems.com [ C:\Documents and Settings\Mat Shepherd\Application Data\Macromedia\Flash Player\#SharedObjects\V4FDSQUJ ]
ad.yieldmanager.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
ad.yieldmanager.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
ad.yieldmanager.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
ad.yieldmanager.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
ad.yieldmanager.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
ad.yieldmanager.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.adtech.de [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.apmebf.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.mediaplex.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.mediaplex.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
server.cpmstar.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
server.cpmstar.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
server.cpmstar.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.adlegend.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.adlegend.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.doubleclick.net [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.2o7.net [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.mediaonenetwork.net [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.atdmt.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.bs.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.serving-sys.com [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]
.paypal.112.2o7.net [ C:\Documents and Settings\Mat Shepherd\Local Settings\Application Data\Google\Chrome\User Data\Default\Cookies ]

Trojan.Agent/Gen-Nullo[Micro]
C:\PROGRAM FILES\GOOGLE\GOOGLE EARTH\GOEC62~1.DLL

#4 boopme

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Posted 06 January 2011 - 08:57 PM

You're welcome. I would still like to do an Online scan to be sure there is nothing left.


Please perform a scan with Eset Online Antiivirus Scanner.
This scan requires Internet Explorer to work. Vista/Windows 7 users need to run Internet Explorer as Administrator.
To do this, 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 Posted Image button.
  • Read the End User License Agreement and check the box:
  • Check Posted Image.
  • Click the Posted Image button.
  • Accept any security warnings from your browser.
  • Check Posted Image
  • Check Remove found threats and Scan potentially unwanted applications. (If given the option, choose "Quarantine" instead of delete.)
  • Click the Start button.
  • ESET will then download updates for itself, install itself, and begin scanning your computer.
  • If offered the option to get information or buy software at any point, just close the window.
  • The scan will take a while so be patient and do NOT use the computer while the scan is running. Keep all other programs and windows closed.
  • When the scan completes, push Posted Image
  • Push Posted Image, and save the file to your desktop as ESETScan.txt.
  • Push the Posted Image button, then Finish.
  • Copy and paste the contents of ESETScan.txt in your next reply.
Note: A log.txt file will also be created and automatically saved in the C:\Program Files\EsetOnlineScanner\ folder.
If you did not save the ESETScan log, click Posted Image > Run..., then type or copy and paste everything in the code box below into the Open dialogue box:

C:\Program Files\ESET\EsetOnlineScanner\log.txt
  • Click Ok and the scan results will open in Notepad.
  • Copy and paste the contents of log.txt in your next reply.
-- 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.

NOTE: In some instances if no malware is found there will be no log produced.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#5 nitro459

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Posted 07 January 2011 - 06:53 PM

Hi Boopme,

I ran the ESET scan and it found nothing. No log was created.

Thanks again for your fantastic help.

How would you recommend I avoid this happening again?

#6 boopme

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Posted 07 January 2011 - 08:31 PM

I need to ask if Google Earth was a legit download as that is always a prime source of malware. Now it was also possible the malware attached itself to te Dll.

EDIT before the next step I wanted to ask... What version of JAVA is running?
Go into Control Panel>Add Remove Programs. Be sure the 'Show Updates' box is checked. Go down the list and tell me what Java applications are installed and their version. (Highlight the program to see this).


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.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.

Tips to protect yourself against malware and reduce the potential for re-infection:Avoid gaming sites, pirated software, cracking tools, keygens, and peer-to-peer (P2P) file sharing programs. They are a security risk which can make your computer susceptible to a smörgåsbord 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 malicious 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.

Keeping Autorun enabled on USB and other removable drives has become a significant security risk due to the increasing number of malware variants that can infect them and transfer the infection to your computer. To learn more about this risk, please read:

Edited by boopme, 07 January 2011 - 08:33 PM.

How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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