BleepingComputer.com: Elusive Dropper

So, I’ve actually had some serious issue with my lap top for an extended period of time now but the most recent fad is particularly troubling. I suspect I may have some sort of a Trojan Dropper, although how to locate and remove it I cannot say.

Every night before I close down for bed I scan my computer with Super Anti-Spyware. Usually it will turn up an item or two of ad ware, occasionally something more malicious, but about a week ago it came out with something like sixty different threats. Immediately after the scan was done I deleted the bad software and tried to run a scan with malware bytes. Only, it’d inexplicably stopped working. It wouldn’t let me do anything. So, instead I scanned my computer with Avast and it pulled up something like thirty-two threats. Again, I cleaned them all off.

The next night I had a similar experience. This went on until about two days ago when I decided to test something out. I scanned my computer, removed all the malicious stuff, and then scanned it again immediately after. Sure enough, between the few seconds it took me to remove the threats detected by the first scan and start the second one more threats had gotten onto my computer. Since then I’ve been running my virus software almost non-stop but it doesn’t seem to be helping. On the contrary, some of the threats are getting progressively worse. For example, yesterday I detected a Trojan Dropper. I thought maybe that was the problem, but even after removing it I’m still having the same issue.

In addition to this, my computer is running extremely slowly. My browser is constantly crashing, and anytime I open more than two or three tabs the computer locks up.

I decide to try and manually track down the problem so I pulled up task manager and started going through the list of processes. I typed each process into a google search bar and gathered information on whether they were supposed to be running and where they were supposed to be located. Everything seemed to be in order, except one file was labeled in blue instead of black and another was locked so that I couldn’t even scan it. Oh, and I found that my maleware bytes was running even though I'd told it to stop. I clicked to cancel the process and it ignored my prompt so I completely removed it from my computer. The process is no longer showing up but the other problems persist.

Not sure what else to do. Any help?

This post has been edited by hamluis: 09 February 2012 - 10:05 PM
Reason for edit: Moved from Win 7 to Am I Infected.

Advanced scanning tools and Malware experts will be able to help you immensely and they are in the Am I Infected section BC.

Hello and welcome.. lets see what we can see/

Quote

This was MBAm I take it.

Please download MiniToolBox, save it to your desktop and run it.

Checkmark the following checkboxes:

• Flush DNS
  
• Report IE Proxy Settings
  
• Reset IE Proxy Settings
  
• Report FF Proxy Settings
  
• Reset FF Proxy Settings
  
• List content of Hosts
  
• List IP configuration
  
• List Winsock Entries
  
• List last 10 Event Viewer log
  
• List Installed Programs
  
• List Users, Partitions and Memory size.

Click Go and post the result (Result.txt). A copy of Result.txt will be saved in the same directory the tool is run.

Note: When using "Reset FF Proxy Settings" option Firefox should be closed.




Run RKill....


Download and Run RKill

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 your anti-malware softwares you have installed so they do not interfere RKill running as some anti-malware softwares detect RKill as malicious. Please refer to this page if you are not sure how.
  
  
• 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

Do not reboot your computer after running rkill as the malware programs will start again. Or if rebooting is required run it again.


If you continue having problems running rkill.com, you can download iExplore.exe or eXplorer.exe, which are renamed copies of rkill.com, and try them instead.



Please download TDSSKiller.zip and and extract it.

• Run TDSSKiller.exe.
  
• Click Start scan.
  
• When it is finished the utility outputs a list of detected objects with description.
  The utility automatically selects an action (Cure or Delete) for malicious objects.
  The utility prompts the user to select an action to apply to suspicious objects (Skip, by default). Let the options as it is and click Continue
  
• Let reboot if needed and tell me if the tool needed a reboot.
  
• Click on Report and post the contents of the text file that will open.
  
  Note: By default, the utility outputs the log into system disk (it is usually the disk with installed operating system, C:\) root folder. The Log have a name like: TDSSKiller.Version_Date_Time_log.txt.

Next run MBAM (MalwareBytes):

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

Download Link 1 <<<== Use this one first.

Download Link 2

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.
  For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  
• 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 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.

Troubleshoot Malwarebytes' Anti-Malware