Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




29 posts

Geek


Topic # 54899 22-Dec-2009 20:18
Send private message

Hi geeks,
on my wife's laptop, Avast has picked up the following rootkit:

File name   C:\WINDOWS\System32\Drivers\jrikd.sys
Malware name  Win32:Rootkit-gen [Rtk]

We've tried getting Avast to delete it, but it just pops back. Also, Spybot won't detect it.

Any suggestions on what it is and instructions for how to get rid of it?

Is there any chance that ESET Smart Security would get rid of it if I installed it?

Cheers!

View this topic in a long page with up to 500 replies per page Create new topic
 1 | 2
BDFL - Memuneh
59183 posts

Uber Geek
+1 received by user: 10418

Administrator
Trusted
Geekzone
Subscriber

  Reply # 284698 22-Dec-2009 20:32
Send private message
2820 posts

Uber Geek
+1 received by user: 246


  Reply # 284744 23-Dec-2009 00:15
Send private message

Turn off System Restore then boot into safe mode and run a scan.
Also try malwarebytes antimalware.




 
 
 
 


8020 posts

Uber Geek
+1 received by user: 386

Trusted
Subscriber

  Reply # 284871 23-Dec-2009 17:00
Send private message

I've had good success with Malware Bytes
http://www.malwarebytes.org/

519 posts

Ultimate Geek
+1 received by user: 31

Subscriber

  Reply # 284876 23-Dec-2009 17:31
Send private message

Try malwarebytes and combofix (http://www.bleepingcomputer.com/combofix/how-to-use-combofix)

137 posts

Master Geek
+1 received by user: 22


Reply # 284882 23-Dec-2009 17:58
Send private message

personally I would reinstall the OS; once the system is compromised you can spend hrs trying to clean out the malware, where as a reinstall might take less time; but that all depends on your setup, and how you backup data etc (huzzah for 1tb external drives for backup storage)

oh yes I would also look at installing MS Security Essentials http://www.microsoft.com/Security_Essentials/ which does not test all that bad against all the other free av; (I like the UI as well)



29 posts

Geek


  Reply # 284896 23-Dec-2009 19:27
Send private message

Thanks for all the helpful advice! I'll start working my way through the suggestions Smile

I've been using ESET on my computer for the last year or so, and haven't had any probs. Seems pretty good.



29 posts

Geek


  Reply # 284911 23-Dec-2009 21:21
Send private message

Okay:

I tried free.antivirus.com's HouseCall software, but it didn't detect anything.

Next I tried malwarebytes which did detect the rootkit in question. I deleted and rebooted. Avast promptly reported the rootkit again Cry

I may have to take Mr Kontonnz' advice yet...

2820 posts

Uber Geek
+1 received by user: 246


  Reply # 284933 23-Dec-2009 23:22
Send private message

Did you disable system restore and run the scan in safe mode?






29 posts

Geek


  Reply # 284935 23-Dec-2009 23:32
Send private message

Yes, just have, and it seems we may have snuffed it Wink
Thanks for your help!

156 posts

Master Geek


  Reply # 285032 24-Dec-2009 18:05
Send private message

What's the chance you could post the MBAM log, please?
Run a quick scan also (using MBAM) but not in safe mode. MBAM is designed to work best in normal mode. If it detects something that is locked by Windows in normal, it will ask for a reboot to complete removal.



29 posts

Geek


  Reply # 285053 24-Dec-2009 22:12
Send private message

Malwarebytes' Anti-Malware 1.42
Database version: 3414
Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

24/12/2009 9:57:24 p.m.
mbam-log-2009-12-24 (21-57-24).txt

Scan type: Quick Scan
Objects scanned: 109070
Time elapsed: 4 minute(s), 59 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

~~~~~~~

Earlier, when I deleted the file using Malwarebytes and rebooted, perhaps Avast picked up the dying gasp. After Avast said it was there again, I allowed Avast to scan in safe mode. It picked up a trojan or 2, but not the rootkit. So unless it's hiding under a rock, it seems to be gone.

I'll keep you posted if the problem rears its head again any time soon!

Thanks everyone for your help Smile

156 posts

Master Geek


  Reply # 285056 24-Dec-2009 22:26
Send private message

Loverly, but I was hoping for the earlier one that nabbed it, before it was later (apparently) re-created.
On the main MBAM GUI, click on the "logs" tab.
Shouldn't be hard to find.
The file name is rare, (C:\WINDOWS\System32\Drivers\jrikd.sys) and thus very suspicious.
I wouldn't trust that computer 100% until you know it's clean.

137 posts

Master Geek
+1 received by user: 22


  Reply # 285066 24-Dec-2009 23:06
Send private message

the problem with malware/rootkits is that they are extremely tenacious and overall can be a pain to be removed;
personally if a system has been infected with a rootkit I would rebuild, and with malware depending on type I would clean.


156 posts

Master Geek


  Reply # 285068 24-Dec-2009 23:28
Send private message

Some can be, for sure, but antirootkit technology has made pretty big steps in the past year or two, so it's not always the "death sentence" it was considered to be not so long ago.
A problem with this sort of malware is it can be difficult, without expert help, to know that the system is clean. This might involve posting in a dedicated removal forum, and using tools/fixes as directed by trained volunteers.
Given the choice I'd rather try to fix a computer affected by a rootkit, than some of the buggy file infectors around, such as Vitro/Virut, or Sality.

The fact that Avast re-detected this after MBAM detected and removed it is reason for concern. If Avast detected it in MBAM's quarantine, not so much of a worry. But if something is re-spawning it, that's a big concern, because it means the spawning agent is still there, hidden and undetected.

8020 posts

Uber Geek
+1 received by user: 386

Trusted
Subscriber

  Reply # 285081 25-Dec-2009 00:53
Send private message

falcott:

I allowed Avast to scan in safe mode. It picked up a trojan or 2, but not the rootkit. So unless it's hiding under a rock, it seems to be gone.



Those other trojans could easily have re-installed the rootkit.

 1 | 2
View this topic in a long page with up to 500 replies per page Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

UAV Traffic Management Trial launching today in New Zealand
Posted 12-Dec-2017 16:06


UFB connections pass 460,000
Posted 11-Dec-2017 11:26


The Warehouse Group to adopt IBM Cloud to support digital transformation
Posted 11-Dec-2017 11:22


Dimension Data peeks into digital business 2018
Posted 11-Dec-2017 10:55


2018 Cyber Security Predictions
Posted 7-Dec-2017 14:55


Global Govtech Accelerator to drive public sector innovation in Wellington
Posted 7-Dec-2017 11:21


Stuff Pix media strategy a new direction
Posted 7-Dec-2017 09:37


Digital transformation is dead
Posted 7-Dec-2017 09:31


Fake news and cyber security
Posted 7-Dec-2017 09:27


Dimension Data New Zealand strengthens cybersecurity practice
Posted 5-Dec-2017 20:27


Epson NZ launches new Expression Premium Photo range
Posted 5-Dec-2017 20:26


Eventbrite and Twickets launch integration partnership in Australia and New Zealand
Posted 5-Dec-2017 20:23


New Fujifilm macro lens lands in New Zealand
Posted 5-Dec-2017 20:16


Cyber security not being taken seriously enough
Posted 5-Dec-2017 20:13


Sony commences Android 8.0 Oreo rollout in New Zealand
Posted 5-Dec-2017 20:08



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.