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Possible root kit


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6 replies to this topic

#1 NoSkill

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Posted 22 June 2011 - 11:16 AM

When I boot vista home premium, I get an error message worded like the quote below.

Could not load or run c:\users\username\AppData\local\temp\crss.exe specified in the registry. Make sure the file exists on your computer or remove the reference to it in the registry


The connection icon on the bottom right close to the clock looks shows connection to the wireless network, but no response from any updating programs such as windows update, spybot, or AVG. I can't use mozilla or IE to connect. If you need any extra info plz don't hesitate to post, PM, or email me.

I have been using another PC across the house in a common area for about 1.5 month. Sharing a PC SUX! I am highly motivated to fix this problem and will make myself available to resolve this problem.

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#2 Blade

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Posted 23 June 2011 - 09:59 PM

Hello and :welcome: to BleepingComputer.

Let's see what we're dealing with here.

Since you are unable to use the internet on the infected computer, download requested files using a clean computer and transfer them to the infected machine using a CD or Flash drive. Also, you can use the same method to move requested logs from the infected computer to your clean computer so that you can post them here. If you choose to use a flash drive, please run the following program on your clean computer before proceeding. Note that, unless otherwise specified, all other tools I ask you to run should be run on the infected computer.


For XP systems
Please download Flash_Disinfector.exe by sUBs and save it to your desktop.
  • Double-click Flash_Disinfector.exe to run it and follow any prompts that may appear.
  • The utility may ask you to insert your flash drive and/or other removable drives. Please do so and allow the utility to clean up those drives as well. <-- THIS IS IMPORTANT!!!
  • Hold down the Shift key when inserting the drive until Windows detects it to keep autorun.inf from executing if it is present.
  • Wait until it has finished scanning and then exit the program.
  • Reboot your computer when done.
Note: As part of its routine, Flash_Disinfector will create a hidden folder named autorun.inf in each partition and every USB drive that was plugged in when you ran it. Do not delete this folder...it will help protect your drives from future infection by keeping the autorun file from being installed on the root drive and running other malicious files.

For Vista and Windows 7 systems
Please download and use Panda USB Vaccine. Follow the onscreen prompts.

***************************************************

Please download RKill by Grinler from one of the 4 links below and save it to your desktop.

Link 1
Link 2
Link 3
Link 4
  • Before we begin, you should disable any anti-malware software you have installed so it does not interfere with RKill running. This is because some anti-malware software mistakenly detects RKill as malicious. Please refer to this page if you are not sure how to disable your security software.
  • Double-click on Rkill on your desktop to run it. (If you are using Windows Vista, please right-click on it and select Run As Administrator)
  • A black screen will appear and then disappear. Please do not worry, that is normal. This means that the tool has been successfully executed.
  • If nothing happens or if the tool does not run, please let me know in your next reply
***************************************************

Please download Malwarebytes Anti-Malware and save it to your desktop.
alternate download link

IMPORTANT!!! - when you save the file, rename it to something random, such as bubbles.exe This must be done before beginning the download!

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.
  • 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 definition updates, manually download them from http://data.mbamupdates.com/tools/mbam-rules.exe'>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. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

~Blade


In your next reply, please include the following:
Malwarebytes Log

Edited by Blade Zephon, 23 June 2011 - 10:08 PM.

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#3 NoSkill

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Posted 30 June 2011 - 04:51 PM

Ok, so I ran rkill and MBAM. Here is the MBAM log

Scan type: Quick scan
Objects scanned: 139183
Time elapsed: 3 minute(s), 11 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 1
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 1

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_CURRENT_USER\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows\Load (Trojan.Agent) -> Value: Load -> Quarantined and deleted successfully.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
c:\Users\"Username"\local settings\application data\bkb.exe (Trojan.ExeShell.Gen) -> Quarantined and deleted successfully.

After using MBAM and restarting my PC scans clean. I was able to get updates for all programs on restart. I was still unable to use mozilla to access the net so I uninstalled and downloaded mozilla (5.0). Now everything is fine. Thank very much for your help.

I almost forgot to mention a new problem that I noticed after using MBAM. On start up a program named System configuration pops up in the right corner by clock and says it is blocking a start up program. When I look at the menu (for sys config) the choices are show or remove blocked start up programs, run blocked program, view help, or exit. When I looked at the run blocked program option, the only listing was for MBAM.
What does this mean?

#4 Blade

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Posted 01 July 2011 - 03:51 AM

System Configuration. . . is this a program you installed? I'm not familiar with the name.

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#5 NoSkill

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Posted 12 August 2011 - 09:01 PM

Sorry about the long silence. I've been in the process of moving to a new town to find work.

I did not install this on my machine. Originally I thought this was part of Vista's recovery tools. The system configuration popup seems like malware. It happens on start up located in the bottom right task bar where the clock is. When it comes up has a caption that says programs blocked on start up. I don't know anymore about it, but I don't like it.

Edited by NoSkill, 12 August 2011 - 09:03 PM.


#6 Blade

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Posted 13 August 2011 - 12:54 AM

Can you get me a screenshot of the popup?

~Blade

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#7 NoSkill

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Posted 24 August 2011 - 01:15 AM

System configuration is a utility program built into windows that will allow for editing of programs windows starts up on boot of vista.

This is what is looks like. There are many screen shots of the program and directions on it's uses, but I can't see how to make it stop blocking MBAM.




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