Jump to content


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.

Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.


Home Network Infected?

  • Please log in to reply
1 reply to this topic

#1 EricMiller


  • Members
  • 1 posts
  • Local time:10:30 AM

Posted 12 December 2008 - 02:43 PM

Hardware involved: 2 PCs running XP on a Linksys router. Yes, I have changed the password n the router from default. DSL modem. Printer networked on the router.

Situation: Returned home from work on Thursday evening to find the family computer was "offline." I rebooted, but, was still not able to connect to the internet. I inspected the cabling, rebooted the router and modem and ran diagnostics to no avail. Router port light goes out when I disconnect the cable and lights up when the cable is replaced. Browser can't hit the router. Ping to router IP address returns timed out/unable to reach domain.

At this point, I turned on the 2nd computer and found it could reach the internet. Turned 2nd computer off.

I ran CCleaner on first computer. It found a few viruses that had previously been quarantined.

Reboot and still no internet. I can, however, print to the network printer ... :thumbsup:

Attempted to do a restore. Will not allow me to restore.

Turned 2nd computer on again. Did some research on the internet trying to figure this out. Do an ipconfig command on 1st computer. Find no default gateway set. Only fields dipslaying info are subnet mask and IP address: "" Got into the router and checked it out. Everything seemed to be fine on it....although no devices were appearing on the DHCP table.

Turn 2nd computer off, again. Really puzzled as to behavior.

Return about 1 hour later with an idea. Turn on 2nd computer to check on internet. Find 2nd computer is now behaving in same manner. No internet. cannot reach router. IP address "".

ipconfig /all reveals that autoconfig is enabled and the autoconfig IP addresses are supplied on both computers.

What the hell is going on? I see no traffic going out the DSL modem. Activity light is dead. I cannot get anything in. The PCs print to the network printer so they ARE going to the router, but, something is preventing them from SEEING the router. :flowers:

Any suggestions as to what to investigate and what would tinker with IP settings like this? What would prevent System Restore from running? I ran hijack this, but, nothing is jumping out at me and saying "GET RID OF ME!!!!"

Edited by EricMiller, 12 December 2008 - 02:44 PM.

BC AdBot (Login to Remove)


#2 Guest_superbird_*


  • Guests

Posted 13 December 2008 - 08:56 AM


From now on, I speak about PC1 and PC2, I mean your two systems then.

Please do this on both systems, and post both logfiles with despcription (PC1, PC2) in your next reply:

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 Download_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 and you may be prompted to restart your computer. (see Note below)
  • 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 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. Failure to reboot will prevent MBAM from removing all the malware.

Edited by superbird, 13 December 2008 - 08:57 AM.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users