In the Add Object dialog box, click Replace existing permissions on all subkeys with inheritable permissions. This prevents the Conficker malware from creating the Scheduled Tasks that can reinfect the system. Right-click File System , and then click Add File. Make sure that Tasks is highlighted and listed in the Folder dialog box.
In the dialog box that opens, click to clear the check boxes for Full Control , Modify , and Write for both Administrators and System. Set AutoPlay Autorun features to disabled.
This keeps the Conficker malware from spreading by using the AutoPlay features that are built into Windows. NoteDepending on the version of Windows that you are using, there are different updates that you must have installed to correctly disable the Autorun functionality:. To disable the Autorun functionality in Windows Vista or in Windows Server , you must have security update installed described in security bulletin MS To disable the Autorun functionality in Windows XP, in Windows Server , or in Windows , you must have security update , update , or update installed.
To set AutoPlay Autorun features to disabled, follow these steps:. In the Turn off Autoplay dialog box, click Enabled. Allow for enough time for Group Policy settings to update to all computers. Generally, Group Policy replication takes five minutes to replicate to each domain controller, and then 90 minutes to replicate to the rest of the systems.
A couple hours should be enough. However, more time may be required, depending on the environment. After the Group Policy settings have propagated, clean the systems of malware. If your antivirus software does not detect Conficker, you can use the Microsoft Safety Scanner to clean the malware. Note The Microsoft Safety Scanner does not prevent reinfection because it is not a real-time antivirus program. This tool is available as a component of the Microsoft Desktop Optimization Pack 6.
These manual steps are not required any longer and should only be used if you have no antivirus software to remove the Conficker virus. The following detailed steps can help you manually remove Conficker from a system:. Log on to the system by using a local account. Important Do not log on to the system by using a Domain account, if it is possible.
Especially, do not log on by using a Domain Admin account. The malware impersonates the logged on user and accesses network resources by using the logged on user credentials. This behavior allows for the malware to spread. Stop the Server service. This removes the Admin shares from the system so that the malware cannot spread by using this method. Note The Server service should only be disabled temporarily while you clean up the malware in your environment.
This is especially true on production servers because this step will affect network resource availability. As soon as the environment is cleaned up, the Server service can be re-enabled. Select Disabled in the Startup type box. ImportantThis section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly.
Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it.
Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:. Click Start , type regedit in the Start Search box, and then click regedit. In the Value data box, type 4, and then click OK. Exit Registry Editor, and then restart the computer. Note The Task Scheduler service should only be disabled temporarily while you clean up the malware in your environment.
This is especially true on Windows Vista and Windows Server because this step will affect various built-in Scheduled Tasks. As soon as the environment is cleaned up, re-enable the Server service. Download and manually install security update MS For more information, visit the following Microsoft Web site:. In this scenario, you must download the update from an uninfected computer, and then transfer the update file to the infected system.
We recommend that you burn the update to a CD because the burned CD is not writable. Therefore, it cannot be infected. If a recordable CD drive is not available, a removable USB memory drive may be the only way to copy the update to the infected system.
If you use a removable drive, be aware that the malware can infect the drive with an Autorun. After you copy the update to the removable drive, make sure that you change the drive to read-only mode, if the option is available for your device. If read-only mode is available, it is typically enabled by using a physical switch on the device. Then, after you copy the update file to the infected computer, check the removable drive to see whether an Autorun.
If it was, rename the Autorun. If you are still using an old OS that is vulnerable to virus Conficker, the most urgent thing is to update Windows better to its newest version. Therefore, you have shut down the backdoor for the malware. How to determine whether your system is vulnerable to Conficker or not? Generally, if you are using Windows 7 or later edition, you are safe from Conficker. If you are running a system earlier than Windows 7, especially with MS network service, you are probably to be infected by Conficker.
Just update your OS will solve the problem! How to restore files from Avast Virus Chest? How to delete a file from Avast Virus Chest? Since one of the spreading ways of Conficker is through USB flash media or shares, you are strongly recommended to pay attention to the removable devices you are going to connected to your computer and shared files you received you are going to open, especially the unauthorized devices and shares from strangers.
What should you do? Never use a USB or open a shared file? You can still use USB and shares since they are unavoidable nowadays. The thing you need to do is to take a security scan on the target USB drive or share with Conficker detection tool , Conficker removal tool , or Conficker scanner like Sophos Intercept X Endpoint. Some of you may argue that once you insert a removable drive into your computer, it will be opened automatically without your permission.
In such a situation, you should turn off the autorun service of your system for external media like USB. When you successfully disable the AutoRun or AutoPaly functionality, next time when you connect a USB to the machine, it will ask you before open and run it on the host.
Protecting your computer from viruses, malware, worm, trojan, spyware, etc. No one can do it manually or alone. Therefore, it is recommended to rely on a firewall and antimalware to give complete and continuous protection to your computer. There are also some other methods to prevent yourself from Conficker like setting a strong network password, applying a device control policy…. Click to tweet. As far as this article was written, no version of Conficker causes data loss to its infected computers.
Yet, no one can guarantee that there is also no data loss caused by Conficker. If so, what can we do for the preparation of the possible damage? Our purpose is to avoid losing data. Thus, even if one or two locations are attacked, we can still have the rest and keep our normal work. Then, how to quickly make copies of files in a reasonable manner? Free Download. Step 4. In the Backup screen, click the Source module to select the items you plan to back up on your machine.
Step 5. Then, click the Destination module to specify where to save the backup image. External storage place is recommended. Also, note that the target storage location will be overwritten. Step 6. Check the backup task. Finally, confirm the task by clicking the Back up Now button in the lower right. The backup task will start after another confirmation. NOTE: We recommend reading the following article for more information about this solution.
You will need to restart your computer for the changes to take effect. NOTE: In addition to downloading and installing the latest security patches, you can take other precautionary measures to reduce the risk of infection. Reset your system passwords to admin accounts using more sophisticated ones. Note that the infiltration can spread through shared folders. Type your old password, type your new password, type your new password again to confirm it, and then press ENTER.
If you don't have an ESET product 3. Update your virus signature database. To verify that the stand-alone cleaner removed the Conficker threat, rerun the stand-alone cleaner and then run a scan with your ESET product.
After successfully running the ESET stand-alone cleaner, we recommend that you read the following Microsoft article for information about important security patches and recommended group changes:. For maximum protection against future threats, make sure your operating system is patched according to Microsoft's recommendations and that your ESET product is up to date. Patches are not needed for Windows 7 and Server The patches below are not necessary for Windows 7 or Server r2, as the exploit used by Conficker does not exist on these operating systems.
Last Updated: Mar 23, Was this information helpful? Additional resources. User Guides. ESET Forum.
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