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Numerous Popups and slowed computer/network - help please


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4 replies to this topic

#1 pedrojar

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Posted 27 May 2015 - 08:17 AM

Hi, this is my first post here, and it's kind of a last hope.

 

After almost a week searching the internet and installing a lot of software still no luck.

(first of all sorry for my english, I'm from Portugal, please feel fre to correct me or ask something in any doubt)

So this is my problem:

I have a very small network installed here, 3x XP Home, 1x Win7Home, 1TB Iomega NAT, TP-LINK ADSL Router, AVAST free in all PCs.

 

two weeks ago all pcs got infected, suddenly new tabs start to appear with ads. (even in my android phone, when I tried to use the wi-fi network)

Tried to check task manager for suspicious processes but nothing extraordinary.

Uninstalled firefox cleared cache, reset etc... no luck.

run ccleaner, malwarebytes, hitmanpro, they all detected a few different things, apparently not very harmfull and corrected/removed, but without any change on the ads popping and laggy PCs

I have lots of logs created by the different softwares, but I guess you want the ones from the software you are used to, so I will wait for advice on it.

 

Apparently (surely) I may be doing a bad job, since even if I clear (doubt it) the problem in one pc, he gets infected again by the network, but I need the network to connect the internet, and all pcs are usually busy. So I guess I need to work one pc at a time. But someone said that even the router may be infected. I really don't know, hopefully you may help me, but it sure sounds a awful task for you so I am thanking you in advance for any support and understand if you can't because this is a network problem.

 

Best regards from Portugal.

Pedro



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#2 nasdaq

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Posted 28 May 2015 - 08:09 AM

Hello, Welcome to BleepingComputer.
I'm nasdaq and will be helping you.

If you can please print this topic it will make it easier for you to follow the instructions and complete all of the necessary steps in the order listed.
===

Reset your router. It may be infected.

How to Reset a Router Back to the Factory Default Settings
http://www.ehow.com/how_2110924_reset-back-factory-default-settings.html

Then, please reconfigure it back to your preferred setting.. Below is the list of default username and password, should you don't know it ;)

http://www.routerpasswords.com/
http://www.phenoelit-us.org/dpl/dpl.html
===

Reset for Linksys, Netgear, D-Link and Belkin Routers
http://www.techsupportforum.com/2763-reset-for-linksys-netgear-d-link-and-belkin-routers/

====
How to tell if my Wireless is secure.
http://www.ehow.com/how_6775466_tell-wireless-secure_.html

===

If still have popups please run the following tools on one of the XP computers.
Will deal with the others if needed later. I will give you instructions when to do it.

Download Malwarebytes' Anti-Malware from Here

Double-click mbam-setup-2.X.X.XXXX.exe to install the application (X's are the current version number).
  • Make sure a checkmark is placed next to Launch Malwarebytes' Anti-Malware, then click Finish.
  • Once MBAM opens, when it says Your databases are out of date, click the Fix Now button.
  • Click the Settings tab at the top, and then in the left column, select Detections and Protections, and if not already checked place a checkmark in the selection box for Scan for rootkits.
  • Click the Scan tab at the top of the program window, select Threat Scan and click the Scan Now button.
  • If you receive a message that updates are available, click the Update Now button (the update will be downloaded, installed, and the scan will start).
  • The scan may take some time to finish,so please be patient.
  • If potential threats are detected, ensure that Quarantine is selected as the Action for all the listed items, and click the Apply Actions button.
  • While still on the Scan tab, click the link for View detailed log, and in the window that opens click the Export button, select Text file (*.txt), and save the log to your Desktop.
  • The log is automatically saved by MBAM and can also be viewed by clicking the History tab and then selecting Application Logs.
POST THE LOG FOR MY REVIEW.

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.

===

Please download AdwCleaner by Xplode onto your Desktop.
  • Close all open programs and internet browsers.
  • Double click on AdwCleaner.exe to run the tool.
  • Click the Scan button and wait for the process to complete.
  • Click the Report button and the report will open in Notepad.
IMPORTANT
  • If you click the Clean button all items listed in the report will be removed.
If you find some false positive items or programs that you wish to keep, Close the AdwCleaner windows.
  • Close all open programs and internet browsers.
  • Double click on AdwCleaner.exe to run the tool.
  • Click the Scan button and wait for the process to complete.
  • Check off the element(s) you wish to keep.
  • Click on the Clean button follow the prompts.
  • A log file will automatically open after the scan has finished.
  • Please post the content of that log file with your next answer.
  • You can find the log file at C:\AdwCleaner[Sn].txt (n is a number).
===

Download the version of this tool for your operating system.
Farbar Recovery Scan Tool (64 bit)
Farbar Recovery Scan Tool (32 bit)
and save it to a folder on your computer's Desktop.
Double-click to run it. When the tool opens click Yes to disclaimer.
Press Scan button.
It will make a log (FRST.txt) in the same directory the tool is run. Please copy and paste it to your reply.
The first time the tool is run, it makes also another log (Addition.txt). Please attach it to your reply.
===


How is the computer running?
Wait for further instructions.

#3 pedrojar

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Posted 31 May 2015 - 03:48 AM

Dear nasdaq, thank you very much for your prompt support, unfortunatelly I couln't use it because before I could see your reply I lost internet connection for good.

 

Anyway I (think) solved it, and you were right, it was a tampered router problem (TP-LINK) I was avoiding to mess with it, because it took me weeks to put the CCTV and NAT drive accessible, and then securing it, also is a DSL router, in a awful area (single operator, very poor signal).

 

So, in despair, I decided to update firmware of it (after finding this from TP-link: http://www.tp-link.us/article/?id=10706) unfortunatelly they don't supply firmware for my model since 2011...

 

So, I did the reset, did all the necessary basic config (without VPN extras yet) but no internet, DSL is OK, but no internet service.

 

Few hours after discussing with the provider and several signal quality checks they concluded it was a fault line (?!) urgent service was scheduled, No luck.

 

Finally in the end of the day they lowered the upload data rate to 250Kb (from 512 or something, with the some 4Mb download that is the max possible in this location) and service is up!!!

 

No more virus or pop-ups in any network computer, MBAM and AdwC were already installed everywere and are behaving peacefully, did the extra config for the CCTV and FTP NAT. And for now I'm operational again, but there is in fact nothing done to prevent another attack, so I guess is just a question of time.

 

But it's definitelly the router that gets tampered somehow.

 

I will check all your advices later (I'm not there, only in a few days) and THANK YOU, even I didn't  used your help (couldn't bcz I lost internet access to read it) you were absolutely right !!!

 

Best regards from Portugal



#4 nasdaq

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Posted 31 May 2015 - 07:40 AM

Good luck.

If all is well.

To learn more about how to protect yourself while on the internet read this little guide best security practices keep safe.
http://www.bleepingcomputer.com/forums/t/407147/answers-to-common-security-questions-best-practices/
===

#5 nasdaq

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Posted 05 June 2015 - 07:42 AM

It appears that this issue is resolved, therefore I am closing the topic. If that is not the case and you need or wish to continue with this topic, please send me or any Moderator a Personal Message (PM) that you would like this topic re-opened.




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