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Question: should I be concerned about unexpected exe files?


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#1 pasha19

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Posted 28 November 2009 - 12:16 PM

I was defragging an old machine running Windows XP (SP3 fully patched) with file sharing (old style) and a Subversion server (not much else). Anti virus server Avast home, spybot, spyware blaster, spyware guard and daily runs of super anti-spyware all currently updated and all reporting as clean. Also ran boot scans from Avast a day or two ago. This morning several files sizeable executable files appeared in a backup directory (E: drive) unexpectedly they were named a008###.exe where ### were digits I did not record. I tried searching for these files after the defrag and I could not find them with windows search or from the command line

e:\ dir a008*.exe /s

No files returned


e:\ dir a*.exe /s
(two files returned neither like the ones moved during defrag)

is this indicative of a problem or did I store something on this drive I do not remember storing?

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#2 pasha19

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Posted 28 November 2009 - 12:44 PM

I am currently running an Avast boot scan to see if that is still clean. Results may take several hours to complete currently reporting as 18% complete.

#3 mov cx ax

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Posted 28 November 2009 - 05:42 PM

Try This:


Lets take a look with Malwarebytes

Please download Malwarebytes' Anti-Malware from here:
Malwarebytes
Please rename the file BEFORE downloading to abcdefg.exe instead of mbam-setup.exe

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. Temporarily disable such programs or permit them to allow the changes.

Double Click abcdefg.exe to install the application.
* Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select "Perform Full Scan", then click Scan.
* The scan may take some time to finish,so please be patient.
* When the scan is complete, click OK, then Show Results to view the results.
* Make sure that everything is checked, and click Remove Selected.
* When disinfection is completed, a log will open in Notepad and you may be prompted to Restart.(See Extra Note)
* The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
* Copy&Paste the entire MBAM report (even if it does not find anything) in your next reply

Extra Note:
If MBAM encounters a file that is difficult to remove,you will be presented with 1 of 2 prompts,click OK to either and let MBAM proceed with the disinfection process, if asked to restart the computer, please do so immediately.


If Malwarebytes won't install or run

Some types of malware will disable MBAM and other security tools. If MBAM will not install, try renaming it. Right-click on the mbam-setup.exe file and change the .exe extension to .bat, .com, .pif, or .scr and then double-click on it to run.

If after installation, MBAM will not run, open the Malwarebytes' Anti-Malware folder in Program Files, right-click on mbam.exe and change the .exe as noted above. Then double-click on it to run.

Edited by mov cx ax, 28 November 2009 - 05:44 PM.


#4 pasha19

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Posted 29 November 2009 - 07:26 AM

Both the avast bootscan and spybot report the drives as clean.

#5 pasha19

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Posted 29 November 2009 - 08:00 AM

mov cx ax -- Thanks for the offered advice but as I have been unable to verify malwarebytes as a tool recommended here for general users and your status does not indicate you as "trusted source" according to the pinned advice in this forum you will please exuse me for defering action on your advice until I can verify a recommendation for general use of malwarebytes (I just may not have researched enough). Thanks again for the attempt.

#6 mov cx ax

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Posted 29 November 2009 - 10:23 AM

I Am Sorry If You Think Like That :flowers:

But BoopMe Should Be Here In A Bit! :thumbsup: ( If You Like It Like That )

#7 pasha19

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Posted 29 November 2009 - 10:44 AM

I have just found a pinned post from Grindler in support of malwarebytes as a general tool. Likewise a useful suggestion about checking update status of applications with Secunia. Your request now appears reasonable and supported to me and will be initiated shortly. Sorry for my concern but malwarebytes was not included in another of Grindler's Lists of what appeared to me to be recommended end user tools.

#8 garmanma

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Posted 29 November 2009 - 11:04 AM

your status does not indicate you as "trusted source"

Anyone may participate in this particular forum as long as they abide by the rules:
http://www.bleepingcomputer.com/forums/t/182397/am-i-infected-what-do-i-do-how-do-i-get-help-who-is-helping-me/

I believe these files were created when backing up
The entire name is COPYFSC8.A008.exe
http://spywarefiles.prevx.com/RRHJAJ327787...8.A008.EXE.html
Slightly different
http://www.prevx.com/filenames/X7960494559...5B1%5D.EXE.html

I would take the files that you did find and submit them to a jotti and a virustotal scan
http://virusscan.jotti.org/en
http://www.virustotal.com/


Malwarebytes is safe for anyone to run, in fact if you go to delete those files and they will not delete you can use the File Assassin application that comes with Mbam

=====================================


The process of cleaning your computer may require you to temporarily disable some security programs. If you are using SpyBot Search and Destroy, please refer to Note 2 at the bottom of this page.

Please download Malwarebytes Anti-Malware Free version and save it to your desktop.

NOTE: Before saving MBAM please rename it to zztoy.exe....now 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:
    • 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 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 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.

Note 2:
-- MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes (like Spybot's Teatimer), they may interfere with the fix or alert you after scanning with MBAM. Please disable such programs until disinfection is complete or permit them to allow the changes. To disable these programs, please view this topic: How To Temporarily Disable Your Anti-virus, Firewall And Anti-malware Programs
---------------------------
Be sure to re-enable your AV and malware scan tools if they were disabled
Mark
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#9 pasha19

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Posted 29 November 2009 - 12:29 PM

Nothing was found -- the log you requested follows

Malwarebytes' Anti-Malware 1.41
Database version: 3257
Windows 5.1.2600 Service Pack 3

2009/11/29 12:24:25 PM
mbam-log-2009-11-29 (12-24-25).txt

Scan type: Quick Scan
Objects scanned: 92804
Time elapsed: 22 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)

#10 pasha19

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Posted 29 November 2009 - 01:27 PM

Sir;

In response to my earlier reply and your response
http://www.bleepingcomputer.com/forums/t/182397/am-i-infected-what-do-i-do-how-do-i-get-help-who-is-helping-me/

Note the section:

"The use of Combofix or any other high level removal tool is not for this area. If your log shows indications of the use of these tools, there is a high probability your post will be ignored. We respect the wishes of the people that developed these programs for use as tools for trained professionals only."

As a user not trained in the UNITE malware removal processes "any other high level removal tool" is at best a vague concept. Finding a single source of appropriate user tools even using search is difficult on this site. This list was the best I had found prior to that posting

http://www.bleepingcomputer.com/forums/t/405/antivirus-antimalware-and-antispyware-resources/

subsequently I found this referencing the first list with additions

http://www.bleepingcomputer.com/forums/t/2520/how-did-i-get-infected/

and this with another addition

http://www.bleepingcomputer.com/forums/t/250928/instructions-for-posting-advice-in-am-i-infected/

The first of the subsequent lists, as you also state lists malwarebytes as an appropriate end user tool.


If would be nice if the site specified appropriate end user tools and those requiring HJT trained assistance more by actual application name (commercial or technical) and less by reference (such as "any other high level removal tool") to make it easier for both those willing to offer advice and those expected to evaluate the advice to respond appropriately. In my limited and admittedly less informed opinion (when compared to a UNITE trained individual) otherwise unidentified programs have the possibility of falling into the "any other high level removal tool" category as I lack any justification to decide otherwise.

The following post (also the same one you posted) clearly provides guidance that there is responsibility on the part of the requester to either know something about the recommended solution OR the provider of the solution.
http://www.bleepingcomputer.com/forums/t/182397/am-i-infected-what-do-i-do-how-do-i-get-help-who-is-helping-me/

I am a computer professional and the last paragraph of this post and it's associated list appear to clearly eliminate some items that may not be obvious to others.

However even the next to the last paragraph appears to be confusing in the light of the last sentence specifically in providing advice concerning A/V programs and the prohibition against recommending the removal of folders, programs and files. With the long list of A/V software that either is not effective A/V software or has other negative attributes should this more appropriately be phrased as advice in using a supported/approved list of A/V software in accordance with appropriate scanning (and possibly removal) instructions using the mechanisms within the approved A/V software?

The above are all just ideas to improve the documentation and the various user experiences on the site.

#11 pasha19

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Posted 30 November 2009 - 07:47 AM

Thanks to all and this site -- I have added several scans to my daily checks and I believe after a full malwarebytes scan and a full ad-aware scan as well as Secunia PSI scans that the system is in good shape. With their addition to my daily routine (all as one time scans) the system should remain more up to date and less vulnerable although in the last year -- knock on wood -- what I have been doing seemed to be effective. I have learned I should return here periodically to read the pinned articles to keep up with changes in recommendations. Unless anyone feels otherwise this issue can be closed.




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