How to remove Sirefef {Delete Sirefef}

Complete removal instructions to uninstall Sirefef from OS

According to expert, it is described as malicious multicomponent Trojan family that has been created and developed by hackers in order to modify search results and generates pay per click traffic for cybercriminals. This family consists of several components which perform different tasks like downloading updates and additional malware and then hiding it into your system and running payloads. It can destroy your computer speed and reduce its performance. It can also open remote access connected to the infected PC and causes redirects during searches and blocking legitimate security related websites.

Additionally, they can bring more viruses on your computer without permission. Your personal detail will be send to hackers including credit card details, social media details, etc.  All the online activities and financial transaction executed by you will be constantly traced by it. PC infections spread through multiple ways including networks as well as Wi-Fi connections. It can also enter by using microphone and camera of the PC. This malware infection gets in touch with one PC to another with the help of USB drives. This virus can also create registry entries for its regular establish. It can show frustrating ads on your system and redirects your browser on unsafe websites.

Intrusion tactics of Sirefef:

This virus can mostly get spread through bundles of free software programs, spam emails, fake updates for Flash and other software through paid advertisements. Once installed, it will create new registry keys for its automatic startup and use those keys to get back into your system after removal. It can also create its duplicate copies by using different names and spread into different files or folders. As a result of being infected with this threat you may need to repair and reconfigure some Windows security features. That is why it is very tough to find out or remove the infection manually especially if you are a novice user.

Precautionary Measures:

As you know, Sirefef disables security programs and stops working on firewall as well as task manager. Due to this, chances of system corruption will be increase. This infection steals your confidential information and delivers to hackers for illicit work and you will be proven as victim of identity theft. So, it is advised to take some basic precautionary measures as mentioned below:

  • Browse safely and avoid visiting unsafe websites that promote online dating, gambling etc.
  • Don’t click on unsafe links and pop-ups.
  • Don’t participate in suspicious third-party survey etc.
  • Always select advance or custom installation method.
  • Upgrade the security settings and use a proper anti-malware tool.

If you see the symptoms of virus in your computer then don’t be panic.  Just download Automatic Malware Removal Tool and remove the virus immediately whenever detected. More Information has been discussed below for the removal of Sirefef and other Trojan virus by using both manual as well as automatic process.

Short summary

Name: Sirefef

Type: Trojan, malware, spyware

Short description: This Trojan virus is installed silently by other payload droppers.

Symptoms: The victims may notice performance issues and can get infected with other dubious malware.

Distribution: Mainly through download websites and file sharing network.

Removal: Both manual as well as automatic guidelines have been provided below under this post.

Download Recommended Free Scanner Here..!!

(Note: Most of the experts high recommend using automatic scanner to clean an infected system . It doesn’t need high technical skills for usage and other required essential process, rather than to execute the scanner and follow on screen instructions.)

How to eliminate Sirefef from infected computer?

Sirefef is devastating computer infection that causes plenty of annoying troubles. It affects overall functioning of PC and prevents to perform normal tasks both online and offline. For smooth functioning of computer, it is important to eradicate this malware as early as possible. You have two best solutions that can help you get rid out of this problem with minimal effort and in short duration.

First Solution: Delete Sirefef from targeted PC through Manual process (Recommended for users having technical skills)

Second Solution: Uninstall Sirefef and its other related process via Automatic procedure#(Can be used by both technical and non-technical users)

For Mac Users: Follow Automatic instruction to eliminate this creepy malware

First Solution: Manual guide to eradicate malicious threat from PC

Safety Guide: Before going through removal process, it is necessary that you confirm few things as mentioned below:

  • You should have excellent knowledge of registry entries and system files
  • You are capable to reverse situation if process gets wrong or gets failed
  • Have full backup of all your important files and folders

If you match all three conditions as discussed then you are eligible to go for manual method. In case, if you don’t match any of one condition then it is advised to try for second solution that is safe and not requires high technical skills to complete removal process. You can finish entire process via automatic method in simple mouse clicks.

Step 1: Remove Sirefef and other related viruses from Control Panel

At first all you need is to click Windows+R key together to open Run command

Next, write Control Panel and then click on OK button

Now press Uninstall a program option as shown in image

Now search for Sirefef and its other associated files and then click on Uninstall

Step 2: Eliminate Sirefef from installed browsers

From Google Chrome:

First open Google Chrome and then click on Gear icon at top right corner

Next select Tools option and then click on Extensions

From given list select Sirefef and then click on Trash icon to terminate malicious extension from browser


From Mozilla Firefox:

Open Firefox and click on wrench bar on top right corner

Now click on Add-ons option

Finally Go to Extensions option and then select Sirefef to eliminate from PC

From Internet Explorer

All you need to do is to first open browser and then click on Tools menu

Next, click on manage Add-ons option

Then go to Toolbar and Extensions and select Sirefef and other unwanted extension

Finally click on Disable option to delete all selected extensions from browser

From Microsoft Edge

As we know Microsoft Edge not provides extension option. Therefore, it is advised to reset browser settings to eliminate this threat from browser.

At first you need to go top right corner and select More and then go to settings as shown in image

Next, click on View Advanced Settings option

Then Select Add New to choose search provider

Choose your desired search engine and click on Add as default option to reset browser settings

Step 3: Delete Sirefef and its malicious files from Windows registry

At first click on Windows+R key together to open run Window. Next, type regedit and then click on Ok.

Next, locate and eliminate registry entries created by Sirefef and other similar threats.

Registry Entries created by Sirefef


HKEY_CURRENT_USER\software\Microsoft\Internet Explorer\Main\Start Page Redirect=”http://<random>.com”

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Sirefef

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SystemRestore “DisableSR ” = ’1

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run “3948550101?

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “xas”

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\ekrn.exe “Debugger” = ‘svchost.exe’


HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\msascui.exe “Debugger” = ‘svchost.exe’

HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon “Shell” = “%AppData%\<Sirefef>.exe”

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run ‘Random’ HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Random

Second Solution: Automatic process to remove Sirefef from Windows PC

Automatic removal procedure includes use of Spyhunter Anti-Malware. It is powerful security tool inbuilt with so many advance feature and highly sophisticated technique to help you find out all infected items and eradicates permanently. Using this software, you can find out and eliminate all kind of viruses such as Adware, Browser Hijacker, Trojan, Rootkits, Backdoor, Worms and others. It not requires high technical knowledge to run the application. If you are novice then also you can go through the process and eliminate harmful threats easily. You just require scanning your computer and following given instruction to delete this malware. It also comes with real time protection feature that helps you block and prevent entry of malicious threat trying to gain access on PC. With Spyware HelpDesk feature, you can communicate with technical experts and find real solution if you are finding hard to detect and eliminate Sirefef.

User Guide to run Spyhunter security tool to fix above mentioned problems:

Process 1: Click on Download button to install Spyhunter

Process 2: Next, run Spyhunter-installer.exe to install this utility

Process 3: Now, click on “Scan Computer Now” option to start scanning process

Process 4: Finally, click on “Fix Threats” button to terminate infectious files

For Mac Users: Run Combo Cleaner tool to find out Sirefef and delete from PC

If your Mac has been trapped with Sirefef and you have no solution left to terminate this threat then use of MacBooster software is best option you can opt for. It is powerful and reliable Anti-Malware that helps you find out all infected items and deletes permanently. It offers you best experience to use your Mac. This application comes with 16 different functions that make it unique. It is award winning application that has great reputations among Mac users. Below are the steps you need to follow to use Combo Cleaner and uninstall Sirefef from Mac.

At first, you need to download and install Combo Cleaner by clicking button below

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If your PC has got infected with malware scam then it is advised to check your PC. Combo Cleaner professional anti-malware tool will help you in in-depth security analysis. This will reduce your stress and time.

Next is to double press right-click on downloaded file and drag the Combo Cleaner app icon to drop it inside Application Folder icon.

Now, open Launchpad and click on the Combo Cleaner’s icon.

Once you clicked, the new updates and patches for the software will be downloaded automatically. After the app is completely updated, the program will open before you automatically.

In the opened interface, select Antivirus tab and click on desired scan options as per your need. for first time users, it’s recommended to select Full scan option.

After the whole scanning process completes, the detected threats will be shown in the list. Click on the Remove All Threats button.

Also, do make sure to click on the Uninstaller option to detect and remove all unwanted programs active on your Mac.

Prevention tips to avoid entry of Sirefef in future

It is advised to always opt for custom or advance option of installation, it reduces risk of Sirefef and other similar threats to get active

  • Always uncheck hidden options which attempts additional programs on your PC that you not required
  • Avoid visiting adult or porn websites
  • Never update any application and programs from unknown links
  • Scan your external device and emails attachments before using

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