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.


GMER, aswMBR, TDSSKiller reporting hidden service / rootkit, what now?

  • This topic is locked This topic is locked
5 replies to this topic

#1 incognitus_2


  • Members
  • 10 posts
  • Local time:12:31 AM

Posted 03 January 2014 - 05:40 PM





My system is a Windows 8.1 x64 machine. I do not (knowingly) install any funny software of software from unreliable sources.





a) After a routine check with TDSSKiller, it showed a hidden service (file system driver, boot) with a xxxxxxxx.sys file in c:\windows\system32\drivers (the name is always 8 digit numeric, but it changes after each scan or reboot).





B) I double checked with aswMBR which crashes repeatedly, but not before (also) showing the same hidden service.









c) GMER also detect and warns about a hidden service / rootkit.







---- Services - GMER 2.1 ----

Service  system32\drivers\68016131.sys (*** hidden *** )                                                                                                   [BOOT] 68941520                                                   <-- ROOTKIT !!!

---- Registry - GMER 2.1 ----


Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520                                                                                                   
Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520@Type                                                                                              2
Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520@ErrorControl                                                                                      1
Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520@Start                                                                                             0
Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520@ImagePath                                                                                         system32\drivers\68016131.sys
Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520@Group                                                                                             System Reserved
Reg      HKLM\SYSTEM\CurrentControlSet\Services\68941520  


d) CATCHME.exe shows following modification:

detected NTDLL code modification:
ZwEnumerateKey 0 != 49, ZwQueryKey 0 != 21, ZwOpenKey 0 != 17, ZwClose 0 != 196622, ZwEnumerateValueKey 0 != 18, ZwQueryValueKey 0 != 22, ZwOpenFile 0 != 50, ZwQueryDirectoryFile 0 != 52, ZwQuerySystemInformation 0 != 53Initialization error



The detections ONLY happen when I first use TDSSKiller with the "loaded modules" parameter (requiring a reboot). In any other case, e.g. on a freshy booted system, all three tools (TDSSKiller, GMER, aswMBR) do not raise any alarm.


1.) Whats next?

2) Any idea what kind of malware I am dealing with (if not a false positive)?

Any help is greatly appreciated!

Edited by in@cognit.us, 03 January 2014 - 06:31 PM.

BC AdBot (Login to Remove)


#2 incognitus_2

  • Topic Starter

  • Members
  • 10 posts
  • Local time:12:31 AM

Posted 03 January 2014 - 06:40 PM

@MODERATORS: I just realized my original post might be the wrong forum (apologies), could you please move the post to the approprite forum ("Virus, Trojan, Spyware, and Malware Removal Logs", I believe). Thank you!

#3 noknojon


  • Banned
  • 10,871 posts
  • Gender:Not Telling
  • Local time:08:31 AM

Posted 03 January 2014 - 06:51 PM

I have made the request for you -

Or -

As you are badly infected, please follow the instructions in the Preparation Guide starting at Step #6.


NOTE - If you are unable to complete any step, please post the topic and leave a full description of your problems


When you have done that, start a new topic and post the required logs to  Virus, Trojan, Spyware, and Malware Removal Logs forum, NOT here, for assistance by the Malware Response Team Experts.


 Please Use Copy / Paste for your responses, and Do Not Attach them unless your helper requests this.

 If Help Bot responds to your topic, please follow his Step #1 so the team will be notified.


 After doing this, please reply back in this thread with a link to the new topic so we can closed this one.


Thank You -

Edited by noknojon, 03 January 2014 - 06:55 PM.

#4 hamluis



  • Moderator
  • 56,425 posts
  • Gender:Male
  • Location:Killeen, TX
  • Local time:04:31 PM

Posted 03 January 2014 - 07:38 PM

Please...follow Steps 6-8 of the Prep Guide linked to above...and initiate a new topic in the forum containing the Prep Guide.  The logs which you have submitted here do not qualify for movement to the MRL forum, which uses the DDS log as a basic tool.


Once your new topic is properly initiated, please post the link to the new topic here and this topic will be closed to avoid confusion..



#5 incognitus_2

  • Topic Starter

  • Members
  • 10 posts
  • Local time:12:31 AM

Posted 03 January 2014 - 08:06 PM

noknojon, hamluis - thanks for your help!


Here's the link to the newly created topic in the appropriate forum:



#6 Queen-Evie


    Official Bleepin' G.R.I.T.S. (and proud of it)

  • Members
  • 16,485 posts
  • Gender:Female
  • Location:My own little corner of the universe (somewhere in Alabama). It's OK, they know me here
  • Local time:05:31 PM

Posted 03 January 2014 - 09:18 PM

Now that you have posted in Malware Removal Logs

Please refrain from asking for further help from other members or staff until the Malware Removal Team has checked your posted log. The Malware Removal Team work very hard to investigate a unique solution to your problem and you will receive individual expert assistance. This takes time and effort so we ask you to please be patient while waiting for assistance and NOT to make further changes to your computer (install/uninstall programs, use special fix tools, delete files, edit the registry, etc) unless advised by a Malware Removal Team member. Any modifications you make on your own can result in system changes which may not show it the log you already posted. Further, following advice outside of that post may cause confusion for the team member assisting you and could complicate the malware removal process which would extend the time it takes to clean your computer.

The Malware Removal Team should be the only members that you take advice from, until they have verified your log as clean. If you followed any other advice already, please ensure you inform the Malware Removal Team Team Helper when they respond to assist you with your log. This will help them know what has been done and they probably will ask for an updated log.

Please be patient. It may take a while to get a response because the Malware Removal Team members are very busy working logs posted before yours. They are volunteers who will help you out as soon as possible. Once you have made your post and are waiting, please DO NOT "bump" your post or make another reply until it has been responded to by a member of the Malware Removal Team. Generally the staff checks the forum for postings that have 0 replies as this makes it easier for them to identify those who have not been helped. If you post another response there will be 1 reply. A team member, looking for a new log to work may assume another Malware Removal Team member is already assisting you and not open the thread to respond.

If HelpBot replies to your topic, please follow Step One so it will report your topic to the team members.

This topic is now closed.

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users