Another URL:Mal infection from cnc.cedexis.com

Viruses and worms
1

Hi, I keep receiving URL:Mal infection popups from Avast when I visit blog pages on Tumblr.

URL: http://cnc.cedexis.com.wscdns.com/img/36a/r20.gif?rnd=1-1-13960-0-0-36-2668440642-xoGkaMO0ebmyacifcaeqIg0OWTI0@aKWQ_onRqu4U_onRqvaY9VckuOpcaiqdHJcjsaakjcbGkaeuabAcGGaeaayacaakabGagOtyNv0Dg9UmI5TAweUAhyUChjVzaaa

Infection: URL:Mal

Process: C:\Program Files (x86)\Mozilla Firefox\firefox.exe

I’ve attached the required log files.

Thank you.

2

Is it only on tumblr that you get the alerts

CAUTION : This fix is only valid for this specific machine, using it on another may break your computer

Open notepad and copy/paste the text in the quotebox below into it:

CreateRestorePoint: GroupPolicy: Group Policy on Chrome detected <======= ATTENTION GroupPolicyScripts: Group Policy detected <======= ATTENTION CHR HKLM\SOFTWARE\Policies\Google: Policy restriction <======= ATTENTION BHO-x32: No Name -> {45d30484-7ded-43d9-957a-d2fd1f046511} -> No File BHO-x32: No Name -> {5C255C8A-E604-49b4-9D64-90988571CECB} -> No File FF SelectedSearchEngine: Trovi search 2015-07-12 10:40 - 2015-07-12 10:40 - 00000000 _____ C:\Windows\SysWOW64\REN9B56.tmp AlternateDataStreams: C:\Windows:333C4D7A229D35D7 AlternateDataStreams: C:\Users\Admin\Cookies:7qNWG5dYXY7pjwyyeZdo2PiUX1 AlternateDataStreams: C:\Users\Admin\Local Settings:qKUdDXUKswAvNGXhuO3XJ0T1OHsgP AlternateDataStreams: C:\Users\Admin\AppData\Local:qKUdDXUKswAvNGXhuO3XJ0T1OHsgP AlternateDataStreams: C:\Users\Admin\AppData\Local\Application Data:qKUdDXUKswAvNGXhuO3XJ0T1OHsgP CMD: netsh advfirewall reset CMD: netsh advfirewall set allprofiles state ON CMD: ipconfig /flushdns CMD: netsh winsock reset catalog CMD: netsh int ip reset c:\resetlog.txt CMD: ipconfig /release CMD: ipconfig /renew CMD: netsh int ipv4 reset CMD: netsh int ipv6 reset RemoveProxy: EmptyTemp: CMD: bitsadmin /reset /allusers

Save this as fixlist.txt, in the same location as FRST.exe

https://dl.dropboxusercontent.com/u/73555776/FRSTfix.JPG

Run FRST and press Fix
On completion a log will be generated please post that

THEN

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 on Scan.
[*]After the scan is complete click on “Clean”
[*]Confirm each time with Ok.
[*]Your computer will be rebooted automatically. A text file will open after the restart.
[*]Please post the content of that logfile with your next answer.
[*]You can find the logfile at C:\AdwCleaner[S0].txt as well.

3

I did what you said, and I’ve attached the logs, but the alert is still appearing (with a different string of characters in the URL after “?rnd=” each time).

As far as I remember, I have only seen the popup alert when on Tumblr blog pages (not the main Tumblr dashboard).

4

And is this just in firefox or all browsers

5

I just tested Chrome, and it’s happening with that too.

Also, in order for the alert to appear (in Firefox or in Chrome), I sometimes need to open many Tumblr blog pages and/or wait a while, i.e. it seems to happen sporadically.

6

I wonder if it is rolling ads on tumblr that are causing this…

I would like to use a stronger tool on this although, the current indications are that it is a website thing

Download and Install Combofix

Download ComboFix from one of the following locations:
Link 1
Link 2

VERY IMPORTANT !!! Save ComboFix.exe to your Desktop

  • IMPORTANT - Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. If you have difficulty properly disabling your protective programs, refer to this link here

[*]Double click on ComboFix.exe & follow the prompts.
[*]Accept the disclaimer and allow to update if it asks

http://img.photobucket.com/albums/v706/ried7/NSIS_disclaimer_ENG.png

http://img.photobucket.com/albums/v706/ried7/NSIS_extraction.png

[*]When finished, it shall produce a log for you.
[*]Please include the C:\ComboFix.txt in your next reply.

Notes:

  1. Do not mouse-click Combofix’s window while it is running. That may cause it to stall.
  2. Do not “re-run” Combofix. If you have a problem, reply back for further instructions.
  3. If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.

Please make sure you include the combo fix log in your next reply as well as describe how your computer is running now

7

I ran Combofix and I then tried opening Tumblr blog pages, but I didn’t see the alert, so hopefully the problem has been fixed. I’ll post here if the alert pops up again.

Thank you so much for your help!

Edit: Also, I think that most Tumblr blog pages don’t have ads.

8

If you could let me know when you are happy, meanwhile I will check out what combofix removed

9

Additional info to the alleged malware…

Funny is it is browser dependant, in Chrome it does not infest: https://www.virustotal.com/nl/url/a8a48fe811e29bb1231e0111444c3932496bf2a354bd61f5493e5d715e8c82b6/analysis/1436819854/

polonus

10

Support @Avast - as you see above, Avast Internet Security keeps displaying malware warnings for a cnc.cedexis.com object. We validated the object is valid and not infected. Theses impacting our customers,

Please could you update your definitions or let me know what should we do ?

thanks

Rony
cedexis.com
mobile 949.874.0770

11

I still haven’t seen the alerts, so it seems like the problem has indeed been fixed. Thank you again!

12

Subject to no further problems :slight_smile:

I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems

Now the best part of the day ----- Your log now appears clean :thumbsup:

A good workman always cleans up after himself so…The following will implement some cleanup procedures as well as reset System Restore points:

Remove Combofix

Click Start then Run.
On Windows7 or Vista you may use Start Search field if Run is not available.
In the box copy/paste the following command:

ComboFix /Uninstall

Note that there is a space between " ComboFix " and " /Uninstall " .

Then click OK (or press Enter ).
Wait for the uninstall process to complete.

Remove tools

Download and run Delfix
Select the options as shown

https://dl.dropboxusercontent.com/u/73555776/delfix.JPG

: Keep Java Updated :

WARNING: Java is the #1 exploited program at this time. The Department of Homeland Security recommends that computer users disable Java
See this article

I would recommend that you completely uninstall Java unless you need it to run an important software.
In that instance I would recommend that you disable Java in your browsers until you need it for that software and then enable it. (See How to diasble Java in your web browser and How to unplug Java from the browser)

If you do need to keep Java then download JavaRa
Run the programme and select Remove Java Runtime. Uninstall all versions of Java present
Once done then run it again and select Update Java runtime > Download and install Latest version

https://dl.dropboxusercontent.com/u/73555776/javara.JPG

Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

Malwarebytes

Update and run weekly to keep your system clean

Unchecky

Click on the link above to be taken to Unchecky.com
click the very large Download button.
click Save
Click Open folder
Right click on the Unchecky_setup and choose to Run as Administrator
Once open click the Install button.
Then click on Finish
Unchecky is now installed and will help you keep unwanted check boxes unchecked, this is a fire and forget programme :wink:

It is critical to have both a firewall and anti virus to protect your system and to keep them updated.

To learn more about how to protect yourself while on the internet read this little guide Best security practices Keep safe :wave: