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Win32:conhook-df


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#1 KristyC

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Posted 08 September 2008 - 07:05 PM

Hello: I am new to this forum and I'll be the first to admit I'm not very technical, so I may need some hand-holding through all of this (sorry). I recently ran Avast anti-virus software on my 2001 Dell desktop (with very little memory) and the Avast found the following file: C:\windows\system32\_c003902d.dat Avast called it Malware: Win32:ConHook-DF(Trj). I cannot perform a Move to Chest, and I am afraid to delete it as it appears to be located within the operating system.

I am running XP SP3 on my desktop machine and the Geek Squad (yes, from Circuit City) set up a wireless network for me (I have a more modern laptop). My desktop is actually running pretty well, with only an occasional pop-up and sometimes IE has to close. Only once did my toolbar disappear for a few moments. I have tried to research this particular variety of ConHook, but can't find much---though it appears to be an older variety. If I were to purchase McAfee or BitDefender, are these tools good at fixing this problem or are they better at preventing problems like this? Is my laptop at risk? I'm too scared to even turn it on.

I used to run Norton antivirus on my machine, but it really slowed it down. Right now I only have Avast and Ad-aware on my machine. Strangely, the Windows Malicious Software Removal Tool did not find the ConHook file. I would like to get rid of this trojan horse, but I am not sure how to proceed. PLEASE NOTE: If you suggest that I paste Highjack This logs or others, please tell me how to run a highjack this and capture logs.

THANK YOU, THANK YOU, THANK You!!!
Kristy

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#2 boopme

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Posted 08 September 2008 - 10:20 PM

Hi,welcome to BC. Let's run an MBam scan first.

Please download Malwarebytes Anti-Malware and save it to your desktop.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
  • MBAM will automatically start and you will be asked to update the program before performing a scan. If an update is found, the program will automatically update itself. Press the OK button to close that box and continue. If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install.
  • On the Scanner tab:
    • Make sure the "Perform Quick Scan" option is selected.
    • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
  • Back at the main Scanner screen, click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes, they may alert you after scanning with MBAM. Please permit the program to allow the changes.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#3 KristyC

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Posted 10 September 2008 - 06:31 PM

:thumbsup:

Thank you for such wonderful, detailed instructions. I did exactly what you directed and the Malwarebytes program found 9 infected objects (one of which was the ConHook-DF file that I was originally concerned about). Malwarebytes did indeed prompt me to reboot the computer (it needed to in order to remove the ConHook-DF file), which I did. Upon the reboot, Avast is no longer indicating infection with the ConHook-DF file (I am very, very happy!!!). I will paste the log file below.

I have just a few more questions before pasting the log file; because this desktop is on a network with my laptop, should I expect that the laptop is also infected (that is, does that trojan travel through networked computers)? Should I also run the Malwarebytes on the laptop? Is freeware such as Malwarebytes and Avast sufficient security, or should I spend $ on the big name security products? Finally, is there anything else I should do for my desktop?

I want to thank you for all your time and patience; I am so happy to have found this forum!
Kristy

Here is the log from my run of Malwarebytes Anti-Malware:
Malwarebytes' Anti-Malware 1.28
Database version: 1137
Windows 5.1.2600 Service Pack 3

9/10/2008 6:15:25 PM
mbam-log-2008-09-10 (18-15-25).txt

Scan type: Quick Scan
Objects scanned: 67560
Time elapsed: 18 minute(s), 34 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 1
Registry Keys Infected: 1
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:
C:\WINDOWS\SYSTEM32\__c003902D.dat (Trojan.Agent) -> Delete on reboot.

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\__c003902d (Trojan.Vundo) -> Delete on reboot.

Registry Values Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a00f3bd7d7e.exe (Trojan.Agent) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\a00face2e84.exe (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\kristy2\Local Settings\Temp\_A00F3BD7D7E.exe (Trojan.Agent) -> Quarantined and deleted successfully.
C:\Documents and Settings\kristy2\Local Settings\Temp\_A00FACE2E84.exe (Trojan.Agent) -> Quarantined and deleted successfully.
C:\WINDOWS\SYSTEM32\__c003902D.dat (Trojan.Vundo) -> Delete on reboot.
C:\WINDOWS\SYSTEM32\__c0018F45.dat (Trojan.Agent) -> Quarantined and deleted successfully.
C:\WINDOWS\SYSTEM32\~.exe (Trojan.Downloader) -> Quarantined and deleted successfully.

#4 boopme

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Posted 10 September 2008 - 07:00 PM

Well thanks for the kind words,it is appreciated.
Now First things first.. Please recan with MBAm and post that log.
Did you uninstall the Norton AV?

I would run it on the laptop also along with these next 2 items I want you to run on this one. Please tho start another topic for that one and call something like checking my laptop. It will be easier if things aer different as we won't have too keep specifying which gets what.
Is the Lappy XP also?

We'll square away the rest when clean...

Download Attribune's ATF Cleaner and then SUPERAntiSpyware , Free Home Version. 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.

Now reboot into Safe Mode: How to enter safe mode(XP)
Using the F8 Method
Restart your computer.
When the machine first starts again it will generally list some equipment that is installed in your machine, amount of memory, hard drives installed etc. At this point you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu.
Select the option for Safe Mode using the arrow keys.
Then press enter on your keyboard to boot into Safe Mode
.

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 Opers 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.

Please ask any needed questions,post logs and Let us know how the PC is running now.
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#5 KristyC

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Posted 11 September 2008 - 10:03 PM

:thumbsup:
Hello again:
I have followed all of your instructions with great success (thanks for the detailed explanations!!).
First, I rescanned with MBAM which did not find anything this time (log to follow).
Nex,t I downloaded ATF-Cleaner and SUPERAntiSpyware (which I also updated).
I rebooted in safe mode and ran the ATF-Cleaner first (it freed 217 MBs of space).
Next, I ran the SUPER (I do not use either Firefox or Opers browsers so that part was moot). SUPER did a complete scan and did find 1 Trojan (log to follow); I quarantined this item and rebooted normally with the prompt from SUPER.

I never did uninstall the NORTON AV; my subscription has since run out and the product was turned off by the Geek Squad guy who set up my wireless network. Should I uninstall the Norton AV product? I think I did try to do that once but ran into problems.

Now that I have all these wonderful Antivirus and Antispyware products on my desktop, are they products that automatically scan or do I need to manually initiate scans? Also, do you think using this suite of products is sufficient? I am amazed by the Bleeping website and all the troubles people have with various viruses.....I never realized there were so many different varieties of malware, spyware, viruses, etc.

Yes, my laptop is also running XP (I need to check which service pack it has---I purchased it in Dec. 2006. I will start a new topic for the laptop, but ---just to confirm---I should start with the MBAM on that machine, correct? I will call the new topic CHECKING MY LAPTOP as you suggested.

Okay, here are the logs from the MBAM scan and the SUPER scan.
First, here is the MBAM scan:
Malwarebytes' Anti-Malware 1.28
Database version: 1141
Windows 5.1.2600 Service Pack 3

9/11/2008 7:57:39 PM
mbam-log-2008-09-11 (19-57-39).txt

Scan type: Quick Scan
Objects scanned: 61679
Time elapsed: 14 minute(s), 3 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)


Now, here is the results from the SUPER scan:
SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 09/11/2008 at 09:28 PM

Application Version : 4.21.1004

Core Rules Database Version : 3564
Trace Rules Database Version: 1552

Scan type : Complete Scan
Total Scan Time : 01:00:55

Memory items scanned : 182
Memory threats detected : 0
Registry items scanned : 4373
Registry threats detected : 0
File items scanned : 23207
File threats detected : 1

Trojan.Unclassified/C00-Installer/A
C:\SYSTEM VOLUME INFORMATION\_RESTORE{11B4CBB0-31B0-483C-A4FE-D6E9E8C1A928}\RP1007\A0065803.EXE


THANK YOU VERY, VERY MUCH!!!!!!!!! Kristy

#6 boopme

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Posted 11 September 2008 - 11:26 PM

Ok you look clean, that last one will go away with the next,last,step. You're welcome and good work by the way.

Now you should 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.
Vista Users can refer to these links: Create a New Restore Point and Disk Cleanup.


Now you have a clean PC and one clean restore point. Probably also gained sime more Hard Drive space too.
This is what I wanted for you. Now you can remove the Norton thru the tool. The tool should make it painfree. It wil get it out of the way,more space again. Also if you find that for some reason you have some issue because of removing it you can Restore to your clean point.

There are new ones being created everyday. That is why we need a few tools on our PC's, as you see no one tool can gat them all. Yes these are a good suite. Your AV,MBAM,SAS. For full time protection you would need to purchase the MBAM or SAS. Otherwise you need to update evey few days and before a scan.

What firewall do you use?

I have Avira free, paid SAS ( I had bought a lifetime subscription a few years ago), MBAM free and and another application Spyware Blaster. It is free and runs full time smootly in the background. You need to update it manually tho. Usually that's the deal, free = manual updates. Paid = real time. You can get SPywareBlaster off our list. I figure I'll let you go there and look at the list. I run Comodo free for life firewall. Also on the list.
Freeware Replacements For Common Commercial Apps
How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook

#7 KristyC

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Posted 13 September 2008 - 07:52 PM

:thumbsup:
Hello Again:
Okay, got the new restore point set. Tried to uninstall the Norton and it had some problems (looks like when I tried to uninstall it some months ago the process was interrupted and now it can't find the setup files). It's only 3MB so I'm going to let it lie. I was able to remove the Symantac Live Update which was 11MB in size. The computer is running very well.
I am very excited to have cleaned my deskto successfully and also to have learned a great deal in the process.

I will begin work on the laptop next (new topic). You asked about my firewall. Well, I'm a bit embarassed to say I "think" I am using the Windows firewall. If that doesn't sound right, then I'm not sure what I have. What do you suggest? Is there one that is much better than others? Is it something I purchase or are the free ones pretty decent?

Thanks again for all your help!
Kristy




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