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SHeur2 CBKQ


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15 replies to this topic

#1 wombat7477

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Posted 24 December 2009 - 10:39 AM

Today, AVG alerted me that multiple threats had been found related to the SHeur2 CBKQ trojan. This happened while I was downloading a file via uTorrent. I got the torrent file from Scrapetorrent. Not sure if it was related, but definitely worth mentioning.

I ran a full computer scan with AVG, which found 2 threats and declared them both healed. I hesitate to trust it.

I am running Windows XP Pro SP3.

An AVG scan of just the files I downloaded via torrent came back negative.

At this time, there has been no unusual behavior.


Thanks in advance for your help. Just let me know what you need from me.

Edited by wombat7477, 24 December 2009 - 10:53 AM.


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#2 Computer Pro

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Posted 24 December 2009 - 01:25 PM

Hello and welcome to Bleeping Computer. My name is Computer Pro and I will be helping you with your issues.

Please subscribe to your topic so that you will be notified as soon as I post a reply, instead of you having to check the topic all of the time. This will allow you to get an email notification when I reply.

To subscribe, go to your topic, and at the top right hand corner by your first post, click the Options button and then click Track this topic. Then bullet the immediate notification bubble. Finally, press submit.



Lets take a look with Malwarebytes

Please download Malwarebytes' Anti-Malware from here:
Malwarebytes
Please rename the file BEFORE downloading to zztoy.exe instead of mbam-setup.exe

MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you. Temporarily disable such programs or permit them to allow the changes.

Double Click zztoy.exe to install the application.
* Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select "Perform Full Scan", then click Scan.
* The scan may take some time to finish,so please be patient.
* When the scan is complete, click OK, then Show Results to view the results.
* Make sure that everything is checked, and click Remove Selected.
* When disinfection is completed, a log will open in Notepad and you may be prompted to Restart.(See Extra Note)
* The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
* Copy&Paste the entire MBAM report (even if it does not find anything) in your next reply

Extra 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.


If Malwarebytes won't install or run

Some types of malware will disable MBAM and other security tools. If MBAM will not install, try renaming it. Right-click on the mbam-setup.exe file and change the .exe extension to .bat, .com, .pif, or .scr and then double-click on it to run.

If after installation, MBAM will not run, open the Malwarebytes' Anti-Malware folder in Program Files, right-click on mbam.exe and change the .exe as noted above. Then double-click on it to run.
Computer Pro

#3 wombat7477

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Posted 24 December 2009 - 03:28 PM

Malwarebytes' Anti-Malware 1.42
Database version: 3425
Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

12/24/2009 3:20:19 PM
mbam-log-2009-12-24 (15-20-19).txt

Scan type: Full Scan (C:\|)
Objects scanned: 199695
Time elapsed: 57 minute(s), 10 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 2
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 5

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\notepad (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\notepad (Trojan.Agent) -> Quarantined and deleted successfully.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
C:\Documents and Settings\Coop\Start Menu\Programs\Startup\scandisk.lnk (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\notepad.dll (Trojan.Agent) -> Quarantined and deleted successfully.
C:\WINDOWS\Temp\cd187417-ba20-4dba-a51f-2c04317f4940.tmp (Trojan.Agent) -> Quarantined and deleted successfully.
C:\Documents and Settings\Coop\Local Settings\Temp\nsrbgxod.bak (Trojan.Agent) -> Quarantined and deleted successfully.
C:\Documents and Settings\Coop\ntload.dll (Trojan.Agent) -> Quarantined and deleted successfully.

#4 wombat7477

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Posted 24 December 2009 - 03:31 PM

Also worth noting is that when the PC rebooted, there was an error that ntload.dll could not be found.

#5 Computer Pro

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Posted 24 December 2009 - 03:44 PM

http://www.bleepingcomputer.com/forums/ind...amp;hl=autoruns

Refer to Boopme's post here (Post #2) on using Autoruns to remove that file that has an error.

Then:

Please run ATF and SAS:

Note.. SAS doesn't open the registry hives for other user accounts on the system, so scans should be done from each user account.

Note 2: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

From your regular user account..
Download Attribune's ATF Cleaner and then SUPERAntiSpyware, Free Home Edition

Save both to desktop ..
DO NOT run yet.
Open SUPER from icon and install and Update it
Under Scanner Options make sure the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining.
Click the "Close" button to leave the control center screen and exit the program. DO NOT run yet.



Double-click ATF-Cleaner.exe to run the program.
Under Main "Select Files to Delete" choose: Select All.
Click the Empty Selected button.

If you use Firefox or Opera browser click that browser at the top and choose: Select All
Click the Empty Selected button.
If you would like to keep your saved passwords, please click No at the prompt.
Click Exit on the Main menu to close the program.

NOW Scan with SUPER
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.
Perform a Complete scan. After scan,Verify they are all checked.
Click OK on the summary screen to quarantine all found items.
If asked if you want to reboot, click "Yes" and reboot normally.

To retrieve the removal information after reboot, launch SUPERAntispyware again.
Click Preferences, then click the Statistics/Logs tab.
Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
If there are several logs, click the current dated log and press View log.
A text file will open in your default text editor.
Please copy and paste the Scan Log results in your next reply.
Click Close to exit the program.
Computer Pro

#6 wombat7477

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Posted 24 December 2009 - 05:39 PM

Still working on the 2nd SAS scan. However, while the first was running, I got this AVG alert:

"C:\System Volume Information\_restore{23E7EA30-8A93-49FB-80A4-37336A7E4C47}\RP754\A0138074.dll";"Trojan horse SHeur2.CBKQ";"Infected"
"C:\System Volume Information\_restore{23E7EA30-8A93-49FB-80A4-37336A7E4C47}\RP754\A0138074.dll";"Trojan horse SHeur2.CBKQ";"Infected"

The first seemed to heal normally, but the second said the file wasn't found (they appear to be the same file).

#7 wombat7477

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Posted 24 December 2009 - 05:47 PM

BTW, I didn't take any action on the AVG alert until AFTER the SAS scan was finished. Here are the results of the SAS scan:

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 12/24/2009 at 05:26 PM

Application Version : 4.32.1000

Core Rules Database Version : 4409
Trace Rules Database Version: 2242

Scan type : Complete Scan
Total Scan Time : 01:01:47

Memory items scanned : 598
Memory threats detected : 0
Registry items scanned : 4857
Registry threats detected : 0
File items scanned : 55339
File threats detected : 1

Adware.CouponBar
C:\WINDOWS\SYSTEM32\CPNPRT2.CID

#8 Computer Pro

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Posted 24 December 2009 - 05:51 PM

How are things running now?
Computer Pro

#9 wombat7477

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Posted 24 December 2009 - 06:01 PM

So far so good, but it wasn't demonstrating any unusual behavior before, other than the big, scary alerts.

#10 Computer Pro

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Posted 24 December 2009 - 06:04 PM

If everything is good then:

Create a new Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
Go to Start > Programs > Accessories > System Tools and click "System Restore".
Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
Then use Disk Cleanup to remove all but the most recently created Restore Point.
Go to Start > Run and type: Cleanmgr
Click "Ok"
Disk Cleanup will scan your files for several minutes, then open.
Click the "More Options" Tab.
Click the "Clean up" button under System Restore.
Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
Click Yes, then click Ok.
Click Yes again when prompted with "Are you sure you want to perform these actions?"
Disk Cleanup will remove the files and close automatically.
Computer Pro

#11 wombat7477

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Posted 24 December 2009 - 06:05 PM

Will do. And thanks for the help on Xmas Eve. Hope you have a great holiday.


I should assume this computer is unsafe for banking/shopping until a OS reinstall is done?
And should I delete the torrents I was downloading?

Edited by wombat7477, 24 December 2009 - 06:07 PM.


#12 Computer Pro

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Posted 24 December 2009 - 06:21 PM

I hope that you have a great holiday too.

It IS safe for banking and such, nothing in the logs says otherwise.

I also would recommend to delete those torrents.
Computer Pro

#13 wombat7477

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Posted 24 December 2009 - 06:26 PM

One last question: the PC is connected to a router. Should I be concerned about the other machines on my home LAN?

#14 Computer Pro

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Posted 24 December 2009 - 06:29 PM

Unless they are networked, such as in file sharing, then they shouldnt.
Computer Pro

#15 wombat7477

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Posted 24 December 2009 - 06:34 PM

I do share some files, mostly media. But I haven't actively moved any files from one host to another since this began.

Edited by wombat7477, 24 December 2009 - 06:35 PM.





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