VirTool:MSIL/SharPersist!rfn

On this page, you will read about description pertaining to harmful virus called VirTool:MSIL/SharPersist!rfn. Removal Guide, suggested Virus Scanner, and ways to Protect the Computer are also included.

What is VirTool:MSIL/SharPersist!rfn?

VirTool:MSIL/SharPersist!rfn is a Trojan that will give remote attacker an access to infected system. This threat also allows an attacker to run arbitrary commands that will add harm on the computer. It is observed that this Trojan may communicate with various servers using shell or http protocol. These servers may host other malicious files, which can update VirTool:MSIL/SharPersist!rfn.

Threat Behavior

VirTool:MSIL/SharPersist!rfn normally arrives as a threat dropped by another Trojan. It may also acquire from maliciously created web sites or legitimate web sites that are compromised by a Trojan. With special characteristics of this threat, possibilities to spread itself are extensive and unpredicted.

Payload

When VirTool:MSIL/SharPersist!rfn is executed, it will drop several files inside Windows directory. These malicious files are essential to Trojans operation. To execute the file on Windows start-up, VirTool:MSIL/SharPersist!rfn will create a registry entry and add subkey to an existing one:
– HKEY_LOCAL_MACHINE\SOFTWARE\[random alpha-numeric characters]

Once the Trojan is operational, it will create a backdoor to allow a remote attacker in performing the following:

  • Explore infected computer’s files and folders
  • Take screen shot image and save the file to specific folder
  • View the list of running processes and create a log of it
  • Steal sensitive information by recording key strokes from the compromised PC

Next, VirTool:MSIL/SharPersist!rfn will attempt to communicate to predefined remote computers/servers to download more threats and update itself.

Illustration for VirTool:MSIL/SharPersist!rfn

How to remove VirTool:MSIL/SharPersist!rfn?

To totally remove VirTool:MSIL/SharPersist!rfn from the computer and get rid of relevant virus and trojan, please execute the procedures as stated on this page. Make sure that you have completely scan the system with suggested malware removal tools and virus scanners.

Remove VirTool:MSIL/SharPersist!rfn Instantly

To instantly remove VirTool:MSIL/SharPersist!rfn, we suggest that you scan the infected computer with this powerful virus removal tool. It can detect and get rid of Trojans, viruses, malware, and adware from the infected computer. To fully protect the computer against VirTool:MSIL/SharPersist!rfn or similar attack, you can activate Sophos to have real-time scanning and complete defense against all forms of threats.

1. Download Sophos Virus Removal Tool from the link below. Save the file on your computer where you can easily access it.

2. Once the download completes, browse the location of the file. Double-click to run the program and begin the install process.

Screnshot of Sophos Installer

3. On first windows of installation wizard, click Next to continue. Then, it will display the program’s License Agreement. You need to Accept the terms in order to proceed. If Windows prompts for User Account Control, please click Yes to proceed.

Screenshot of Sophos EULA Page

4. On succeeding windows, click Next or Continue to carry on with the installation. After completing the installation process, Launch Sophos Virus Removal Tool.

5. Internet connection is required when running this scanner in order to download important updates. Make sure that everything is up-to-date to effectively remove virus like VirTool:MSIL/SharPersist!rfn.

6. Click the  button to  carry out the Scan. This will check the system for presence of malicious objects, malware, and viruses. The tool reveals items that were found linked to VirTool:MSIL/SharPersist!rfn and other suspicious entities. Be sure to remove all identified threats.

Screenshot of Sophos Virus Scan

After executing the above instructions, VirTool:MSIL/SharPersist!rfn should have been eliminated totally from the computer. If there are still signs of infection or computer is displaying unusual behaviors, please continue with the remaining procedures.

Stage 1 : Start Windows in Safe Mode With Networking

Windows 10 Guide

1. Click on Windows logo and select Power icon when options pop-ups.
2. Select Restart from the options while pressing Shift key on the keyboard.
3. Choose an Option window will appear, select the Troubleshoot button.
4. On next window, please choose Advanced Option.
5. On Advanced Option window, click on Startup Settings and then, click Restart button to reboot the computer.
6. When Windows boot on Startup Settings, press function key F5 or number 5 on keyboard.

A simpler alternative for Windows 10 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Windows 8 Guide

1. Click Windows Start icon at the lower left section of the screen.
2. Open Search window and type Advanced in the field. It will open General PC Settings.
3. Click on Advanced Startup and then, click on Restart Now button.
4. Once the computer starts in Advanced Startup option menu, select Troubleshoot.
5. Next, click on Advanced Options to reveal the next section.
6. Click Startup settings and then, click Restart button to boot the PC in Startup Settings.
7. Use function key F5 or number key 5 to Enable Safe Mode with Networking.

Stage 2 :Double Check with Microsoft Security Apps

Microsoft Windows has built-in security application that you can use to double-check if computer is still infected with VirTool:MSIL/SharPersist!rfn. For Windows 8 and 10 users, please run Windows Defender. Users of Windows Vista and older versions can utilize Microsoft Security Essentials to remove VirTool:MSIL/SharPersist!rfn virus.

Windows 8 / 10 Instructions:

Windows Defender is a free tool that was built help you remove VirTool:MSIL/SharPersist!rfn, viruses, and other malicious items from Windows 8 or Windows 10 system. Follow these procedures to scan your computer with Windows Defender:

1. Tap or click the Search charm, search for defender, and then open Windows Defender.

If Windows Defender is not yet installed on the computer, please proceed to download page using the link below. It also contains detailed instruction to install and use the program effectively. Proper usage is required to totally remove VirTool:MSIL/SharPersist!rfn

WD-charm

2. On the Home tab, click Full under Scan Options. Click Scan now to start scanning for presence of VirTool:MSIL/SharPersist!rfn. The process may take a while to complete.

WD-fullscan

3. After the scan, delete/quarantine identified threats wether it is relevant to VirTool:MSIL/SharPersist!rfn or not. You may now restart Windows to complete the virus removal process.

Windows XP, Windows Vista, and Windows 7 Instructions:

1. Open Microsoft Security Essentials by going to Windows Start > All Programs. If the tool is not yet installed on the computer, please download Microsoft Security Essentials from the link below. Save the file on your hard drive.

Complete installation guide and usage are also provided on the same link. It is essential in removing VirTool:MSIL/SharPersist!rfn effectively. If Microsoft Security Essentials is already installed on the PC, please proceed with the steps below.

2. On Microsoft Security Essentials Home screen, please choose Full under Scan Options.

MSE Full Scan

3. Click on Scan Now button to start detecting VirTool:MSIL/SharPersist!rfn items, viruses, and malware on the PC. Scan may take a while, please be patient and wait for the process to end.

How to protect the computer?

The initial defense that comes to the mind of any computer users is to install an anti-virus or anti-malware program. This move is sensible and probably the most practical way to protect the computer against VirTool:MSIL/SharPersist!rfn attack. Hence, keep in mind that having a security software do not give full guarantee of protection. The most part of the prevention still lies on being cautious of users and therefore we are providing the following information as guidelines to protect the computer from virus infection.

Avoid Malicious Websites

There are enormous numbers of websites that was made for the primary purpose of spreading VirTool:MSIL/SharPersist!rfn. Normally, these sites are involved in integrating malicious pop-up and browser hijacker, that will eventually cause further virus infection. Avoid such kind of websites.

Delete Phishing Emails

The mass-mailing of computer viruses gives the attackers the luxury of spreading their malicious code in just one send off. This will arrive in the inbox as email that appears to be from a legitimate organization. So, if you receive an unexpected email with a link or an attached file, better delete it immediately.

Do Not Click a Suspicious Link

Links from social media, forums, and blog sites are sometimes being utilized by attackers to drive web users to a malicious page that contains malicious code. Therefore, do not just click on any link especially if it looks suspicious. Accidental access to the destination site may lead to VirTool:MSIL/SharPersist!rfn infection.

Be Careful When Downloading Files

Cracked software, serial key generators, and several freeware are seen as another method that spreads the VirTool:MSIL/SharPersist!rfn virus. Avoid acquiring these types of application and if there is a need to download a freeware or shareware, be sure to obtain it from the official website or trusted providers.

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