From what you describe, it appears to be a USB flash drive infection
which usually involve malware that modifies and loads an autorun.inf
(text-based configuration) file into the root folder of all drives
(internal, external, removable) along with a malicious executable. When removable media such as a CD/DVD is inserted (mounted), autorun
looks for autorun.inf and automatically executes the malicious file to run silently on your computer. In USB drives, it modifies Windows Explorer's right-click context menu (adds a new default command) and redirects to executing the malicious file if the "Open" command is used or double-clicking on the drive icon. When a flash drive becomes infected, the Trojan will infect a system when the removable media is inserted if autorun has not been disabled. To learn more about this risk, please read:
Please insert your flash drive before we begin. Hold down the Shift key
when inserting the drive until Windows detects it to bypass the autorun feature and keep autorun.inf from executing automatically.
Then download Panda USB and AutoRun Vaccine
and save it to your desktop.alternate download link
Note: Computer Vaccination will prevent any AutoRun file from running, regardless of whether the removable device is infected or not. USB Vaccination disables the autorun file so it cannot be read, modified or replaced by malicious code. The Panda Resarch Blog advises that once USB drives have been vaccinated, they cannot be reversed except with a format. If you do this, be sure to back up your data files first or they will be lost during the formatting process.
- Extract (unzip) the file to your desktop and a folder named USBVaccine will be created.
- Open that folder and double-click on USBVaccine.exe to start the program.
- Click Run.
- Click the button to Vaccinate computer..
- Insert your USB flash drive.
- When the name of the drive appears in the dialog box, click the button to Vaccinate USB drive(s).
- Exit the program when done
Please download Malwarebytes Anti-Malware
(v1.38) and save it to your desktop.alternate download link 1alternate download link 2MBAM 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 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:
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.
- 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.
** If Malwarebytes Anti-Malware results in any error messages, please refer to Fixes for common problems and Error Codes