By | October 25, 2012 | 1 Comment

Luhe.Sirefef.A is a Trojan that is used to distribute rogue computer programs. It is equipped with a technology that can conceal itself once inside the computer. Luhe.Sirefef.A injects a code to legitimate Windows processes to conceal its activity. This attack is known to computer security world as rootkit. With its capability to run under the known process, antivirus program may have a hard time identifying the Trojan. Moreover, it can overpower the security software by ending its process or unloading it from the system.

If Luhe.Sirefef.A virus is present on the computer, it secretly connects to a remote server to further download malware. One of its choices is fake antivirus software. After all, Luhe.Sirefef.A is created for this specific purpose. If the malware completes the task, you will be having two threats to take care of. One is the Trojan, and another is the fake antivirus product.

It is not advisable to delete the infected files. As mentioned, it is a genuine Windows process. Deleting the file will make Windows unstable. You might rather clean the infected file or replace it with the clean one. More of the Luhe.Sirefef.A removal instructions on the appropriate section below.

Type Trojan
Sub-Type Rootkit
OS Affected Windows XP\Vista\7

What are the Symptoms of Luhe.Sirefef.A Infection?

Because of this Trojan’s advance technology to conceal its presence once inside the computer, you may never see antivirus program posting an alert. Some minor signs you may see are browser redirection and presence of uninvited software. However, if your antivirus program is efficient, it may notify you of the attack once Luhe.Sirefef.A is identified.


Follow these Procedures to Remove Luhe.Sirefef.A

Procedure 1: Start Computer in Safe Mode

1. Restart your computer in Safe Mode with Networking

- To run Windows system in Safe Mode, please press F8 after turning ON the computer. Hit the keyboard button before the appearance of Windows logo. If successful, you will see a screen of Windows Advanced Options Menu. See image below for your reference. This area will allow you to choose preferences on how you want to boot the system.

- From the selections, choose Safe Mode with Networking. Please use keyboard's arrow up/down to navigate between selections and press Enter on the keyboard to proceed. Keep in mind that booting Windows in Safe Mode only loads minimum driver files. Thus, most of the devices will not be available on this mode. Seeing pixilated images on the screen is normal since your current resolution is set to low.

SafeMode Networking

Procedure 2: Scan and remove Luhe.Sirefef.A files with MalwareBytes Anti-Malware

To remove Luhe.Sirefef.A, download Malwarebytes Anti-Malware by clicking on the button below. This tool is effective in getting rid of Trojans, viruses and malware.

Download Luhe.Sirefef.A Removal Tool

1. After downloading, please install the program using the default settings.
2. At the end of the installation, please make sure that it will download necessary updates.
3. Once update has completed. The tool will launch.
4. Thoroughly scan the computer and remove all threats detected by this anti-malware program.

Procedure 3: Run Symantec's ZeroAccess Fix Tool to remove Luhe.Sirefef.A components.

This tool from Symantec can remove infections of Luhe.Sirefef.A as well as other variants of the same nature.

1. Click on the button below to download ZeroAccess Fix Tool. Save the file FixZeroAccess.exe to your desktop or any convenient location.

Download FixZeroAccess

2. You need to close any running programs before running this tool.
3. Turn OFF System Restore if you are using Windows XP. Luhe.Sirefef.A files may hide some of its components on system restore files.
4. Next, browse the folder where you saved the file FixZeroAccess.exe. Double-click on it to initiate the tool. To run the file in Windows Vista and Windows 7, right-click on it and choose 'Run as administrator' from the selection.

Icon of ZeroAccessFix Run As Administrator

5. It will display End User License Agreement (EULA), please click on I accept to use the program.
6.Click on Proceed to begin the removal process, let the tool to run and do its course.
7. If it requires you to restart Windows, please do so. This method may remove Luhe.Sirefef.A components such as files and hidden modules.

Restart Windows

8. When Windows starts, ZeroAccess Fix Tool will provide some details of the infection.
9. If it prompts for update, you need to run LiveUpdate to make sure that it contains the most recent virus definitions.
10. Wait for the tool to complete the scan process. When done, it will issue a message and specify identified threats. These threats are removed during the scan process, so, there is no need to worry about their presence.

Procedure 4: Make sure that Luhe.Sirefef.A is 100% deleted with Avast aswMBR

A Trojan often drops malware using an advance technology known as rootkit. It hides the installation of Luhe.Sirefef.A from your anti-virus program and injects malicious code to running Windows processes. To complete the clean-up process, you also need to scan and remove rootkit Trojan.

1. Download aswMBR from Avast server. Save it to your computer.

Avast Rootkit Scanner

2. Double-click on the file aswMBR.exe to run the program.
3. If it prompts you to download the latest Avast! virus definition, please click Yes. This is necessary to identify most recent version of the Trojan as well as hidden files of Luhe.Sirefef.A.

Updating aswMBR

4. Click on Scan button to start checking your computer for presence of rootkit Trojan and other viruses. It will display a message "Scan finished successfully" when done.

aswMBR Scan

5. Click Fix or FixMBR to start removing infection. If aswMBR contains the latest Avast! virus definition file, it will automatically clean infected files on your PC.

Protect your PC from Luhe.Sirefef.A or Similar Attack

Turn On Security Features of your Internet Browser

Internet Explorer - Activate SmartScreen Filter

Internet Explorer versions 8 and 9 has this feature called SmartScreen Filter. It helps detect phishing web sites and protect you from downloading malicious files online. You may have avoided Luhe.Sirefef.A virus if this has been active on your PC. To turn on SmartScreen Filter, follow these steps:

1. Please open Internet Explorer.
2. On top menu, select Tools (IE 9). For IE 8, please look for Safety menu.
3. Select SmartScreen Filter from the drop-down list and click on Turn on SmartScreen Filter.

IE SmartScreen Filter

4. Please restart Internet Explorer.

SEE MORE : Comprehensive steps to activate SmartScreen Filter

Google Chrome's Enable Phishing and Malware Protection

With Google Chrome's Phishing and Malware Detection feature, you will have lesser risks browsing the web. It will display a warning when the site you are trying to visit is suspicious. To enable Phishing and Malware Protection, please do these steps:

1. Open Google Chrome.
2. Click on the Customize and control Google Chrome (3-Bars Icon) located on top right corner of the browser.
3. Select Settings from the drop-down list.
4. Once on the settings page, click on Show advanced settings... at the bottom of the page to see the rest of the Chrome setup.
5. Locate Privacy section and mark 'Enable phishing and malware protection'.

Chrome Security Settings

6. Please restart Google Chrome. New settings keep your browser safe while surfing the web.

SEE MORE : Enable Phishing and Malware Protection on Google Chrome

Mozilla Firefox - Block Attack Sites and Web Forgeries

Phishing and Malware Protection is a built-in feature on Firefox version 3 or later. It warns you when a page you are trying to visit contains phishing content or an attack site designed to drop threats on the computer. To help you keep safe while browsing the Internet using Firefox, please follow this guide:

1. Open Mozilla Firefox browser.
2. On top menu, click on Tools. Then select Options from the list.
3. Select Security and put a check mark on the following items:

  • Warn me when sites try to install add-ons
  • Block reported attack sites
  • Block reported web forgeries

Firefox Security Settings

One thought on “Luhe.Sirefef.A

  1. wesley

    It really did work pretty well. I got access back to the sites and secure servers the virus had somehow blocked. I downloaded AVG which works very well and it still gets hits every several minutes that the virus is attempting to get in…it blocks it..its a bit annoying, but at least I have regained control of my system. it’s also much faster now. Thank you

Leave a Reply

Your email address will not be published. Required fields are marked *