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Could not load or run csrss.exe


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7 replies to this topic

#1 bunkerbuster1

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Posted 28 February 2011 - 01:42 PM

I keep getting this prompt after start up of my PC. "Could not load or run C:/Users/etc/etc/etc csrss.exe" What the hell should I do and what is it about?????

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#2 Matt.PCRookie

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Posted 28 February 2011 - 01:58 PM

If it's there it's malware. Csrss.exe is only good if it's in the registry. If it's not loading just try and clear it with MWB?

#3 hamluis

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Posted 28 February 2011 - 03:14 PM

Not quite.

Csrss stands for Client/Server Run-Time Subsystem, and is an essential subsystem that must be running at all times. Csrss is responsible for console windows, creating and/or deleting threads, and implementing some portions of the 16-bit virtual MS-DOS environment.

Note: The legit csrss.exe file is located in the folder C:\Windows\System32. If located elsewhere it is likely to be some form of malware.

I'll move this to the Am I Infected forum, where a closer examination of your system can be done.

Louis

#4 boopme

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Posted 28 February 2011 - 03:25 PM

Hello, did this occur after removing some malware?

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
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#5 bunkerbuster1

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Posted 28 February 2011 - 04:26 PM

Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org

Database version: 5907

Windows 6.0.6002 Service Pack 2
Internet Explorer 7.0.6002.18005

28/02/2011 21:24:51
mbam-log-2011-02-28 (21-24-51).txt

Scan type: Quick scan
Objects scanned: 201804
Time elapsed: 8 minute(s), 47 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 2
Registry Values Infected: 4
Registry Data Items Infected: 1
Folders Infected: 6
Files Infected: 4

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\{19127AD2-394B-70F5-C650-B97867BAA1F7} (Backdoor.Bot) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\RegistrySmart (Rogue.RegistrySmart) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\Load (Trojan.Agent) -> Value: Load -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell (Hijack.Shell.Gen) -> Value: Shell -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Associations\bak_Application (Hijacker.Application) -> Value: bak_Application -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\conhost (Trojan.Agent) -> Value: conhost -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Associations\Application (Hijacker.Application) -> Bad: (http://www.helpmeopen.com/?n=app&ext=%s) Good: (http://shell.windows.com/fileassoc/%04x/xml/redir.asp?Ext=%s) -> Quarantined and deleted successfully.

Folders Infected:
c:\Users\Marko\AppData\Roaming\registrysmart (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\Users\Marko\AppData\Roaming\registrysmart\Log (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\Users\Marko\AppData\Roaming\registrysmart\registry backups (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\program files\registrysmart (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\program files\registrysmart\microsoft.vc80.crt (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\program files\registrysmart\microsoft.vc80.mfc (Rogue.RegistrySmart) -> Quarantined and deleted successfully.

Files Infected:
c:\Windows\Tasks\registrysmart scheduled scan.job (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\Users\Marko\AppData\Roaming\registrysmart\Log\2007 aug 29 - 12_57_17 pm_970.log (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\Users\Marko\AppData\Roaming\registrysmart\Log\2007 aug 29 - 12_57_38 pm_906.log (Rogue.RegistrySmart) -> Quarantined and deleted successfully.
c:\Users\Marko\AppData\Roaming\registrysmart\registry backups\2007-08-29_13-02-10.reg (Rogue.RegistrySmart) -> Quarantined and deleted successfully.

#6 bunkerbuster1

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Posted 28 February 2011 - 04:41 PM

Before you say anything, thanks a million. Ran Malwarebytes and the fecking thing is gone. Yippee!

#7 boopme

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Posted 28 February 2011 - 09:36 PM

Hello Bunkerbuster, glad to hear it is much better. I would like you to do one more scan in case there were stragglers.

Please perform a scan with Eset Online Antiivirus Scanner.
This scan requires Internet Explorer,Opera or Firefox 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.
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#8 Orange Blossom

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Posted 01 March 2011 - 10:42 PM

Hello,

Does this concern the same computer as this topic? http://www.bleepingcomputer.com/forums/topic382139.html

Orange Blossom :cherry:
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