What is TrojanDropper:MSIL/Perseus!rfn?
TrojanDropper:MSIL/Perseus!rfn is a detection by Microsoft Defender Antivirus to identify a computer threat that is associated with ransomware activities. When this virus infects the computer, it is going to drop additional threat with known capabilities of ransomware, which will block user’s access to the crucial files like documents, photos, images, archives, database, and similar data. The objective of this said virus is to extort money from victims claiming that ransom payment is needed in order to acquire the file recovery software.
TrojanDropper:MSIL/Perseus!rfn spreads in a variety of channels. It can reach the computer through spam emails, malicious websites, social engineering attacks, and infected executable files such as pirated software, dubious freeware, and fake software updates.
Once TrojanDropper:MSIL/Perseus!rfn is executed on the computer, the first thing it would do is to download a copy of itself in the system folder of Windows. The virus also integrates Windows registry entry to run automatically during computer boot up session. This kind of auto start technique by TrojanDropper:MSIL/Perseus!rfn allows it to reside in the memory, which will make it hard to detect by several anti-virus applications.
The role of TrojanDropper:MSIL/Perseus!rfn for infecting the computer is simply to drop additional virus with ransomware capabilities. Its presence on the computer is too risky as it can perform various malicious actions including the following:
- Open a backdoor port.
- Allows hackers to access the computer.
- Collect computer data like IP address, network configuration and software version.
- Connect to a remote server to upload the gathered data.
- Download additional virus from the remote server.
- Disable vital Windows processes particularly security related ones.
How to remove TrojanDropper:MSIL/Perseus!rfn?
To totally remove TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!rfn Instantly
To instantly remove TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!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.
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.
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 TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!rfn and other suspicious entities. Be sure to remove all identified threats.
After executing the above instructions, TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!rfn virus.
Windows 8 / 10 Instructions:
Windows Defender is a free tool that was built help you remove TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!rfn
2. On the Home tab, click Full under Scan Options. Click Scan now to start scanning for presence of TrojanDropper:MSIL/Perseus!rfn. The process may take a while to complete.
3. After the scan, delete/quarantine identified threats wether it is relevant to TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!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.
3. Click on Scan Now button to start detecting TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!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 TrojanDropper:MSIL/Perseus!rfn infection.
Be Careful When Downloading Files
Cracked software, serial key generators, and several freeware are seen as another method that spreads the TrojanDropper:MSIL/Perseus!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.