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Internet Access Fails After Some Time


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#1 Nayde

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Posted 09 March 2010 - 09:10 PM

Hello everyone, I've come to request help about a little issue I'm having. I'm not exactly sure whether it's malware related or not so I thought this would be the best place to post.

In summary, after a period (of either idle or use) the internet will become almost inaccessible. Symptoms are that pages are unable to be loaded: Firefox shows a 'Loading' icon for a fraction of a second then just gives up with no explanation leaving a blank page with an (Untitled) tab.
Internet Explorer also fails, except with the standard "Page cannot be displayed" error.
Rarely in this state, a page can be accessed. Usually if this happens then a vast majority of the elements are missing, e.g. images and style sheets.

Other internet applications also frequently fail to work properly, e.g. Live Messenger.

The Windows Network Troubleshooting tool fails to find any sources for a problem.

If attempting to download a file during this unresponsive state using "Save file as..." for example, this error is returned in a dialogue box (by Firefox):

"The download cannot be saved because an unknown error occurred.
Please try again."

I also use Proxifier software, which occassionally returns the error during this unresponsive state:

"[(Timestamp)] Error : bind failed with error 10055"

According to a few sources, error 10055 is associated with a lack of buffer space, so I started a bit of investigating.

I downloaded SysInternals TCPView, and the log is filled with results like:

svchost.exe:1508 TCP 10.34.24.47:51251 194.80.32.9:8080 CLOSE_WAIT

With the same local and remote address, the same state, , the same protocol, the same process and the local address ports ranging completely (as in every port in this range has a connection) from 49157 to 65535.

A bit of background information:
I'm on a Uni residential network. Internet access is given by configuring applications to use a automatic proxy configuration script. This script provides load balancing across 4 proxy servers, one of which is the remote address given in the TCPView logs.

I'm just wondering whether these numerous connections are the cause of the internet access loss, and whether malware is a cause of these connections.

Regards.

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#2 Nayde

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Posted 18 March 2010 - 06:06 PM

Still no reply eh..?

I've narrowed this issue down to a definite lack of network buffer space issue.
Now I just need instructions on how to locate what's causing it.

Would it be advisable to post a HJT log in the other forum?

Regards.

#3 boopme

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Posted 23 March 2010 - 03:09 PM

Hello,sorry you got lost here.. we're very busy.
if you still need help please run...
TFC by OT
Please download TFC by Old Timer and save it to your desktop.
alternate download link
Save any unsaved work. TFC will close ALL open programs including your browser!
Double-click on TFC.exe to run it. If you are using Vista, right-click on the file and choose Run As Administrator.
Click the Start button to begin the cleaning process and let it run uninterrupted to completion.
Important! If TFC prompts you to reboot, please do so immediately. If not prompted, manually reboot the machine anyway to ensure a complete clean.
Next run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware (v1.44) and save it to your desktop.alternate download link 1
alternate download link 2
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.
  • 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 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.
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#4 Nayde

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Posted 24 March 2010 - 05:19 PM

Thanks for the reply.

(The below was carried out prior to your reply, please don't think I'm ignoring your suggestions, I just think the issue has now been resolved.)

With the aid of netstat and it's various parameters, I was able to isolate the source of the connections as 'Akamai' (a download manager obtained when trying to install 'S4 League' by alaplayer). The download didn't finish due to various reasons, probably due to my university proxy, but I didn't realise it was continually running and attempting to finish the download (apparantly).

I followed the instructions for uninstallation here and the issue hasn't come back as of yet.

Regards.

Edited by Nayde, 24 March 2010 - 05:20 PM.


#5 boopme

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Posted 24 March 2010 - 08:47 PM

Very well and that looks good. Again sorry we did not see you fast enough..
I appreciate your reply.
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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