Trojan:Win32/CryptInject is a generic detection of computer threats from the dangerous ransomware group. With such an attack, it is not just the system that is threatened, other than that, valuable files from computer users are in danger of damaging too. The principle for Trojan:Win32/CryptInject is to decline users access to the target files by encrypting them using an intricate technique, generally the asymmetrical AES-RSA system. Next, the players behind Trojan:Win32/CryptInject will require payment via the Bitcoin currency as a compensation for the decryption tool needed.

Threat Behavior

Spreading Trojan:Win32/CryptInject spam messages routinely transiting where the virus is discharged as an attachment. If it is not the actual file, the e-mail message hold links which, once opened, will begin transferring and executing Trojan:Win32/CryptInject from a distant server. The virus can also arrive on the computer as part of hacked software or serial key generator which is ordinarily hosted on different unlawful servers. In addition to these two best spreaders, manufacturers of Trojan:Win32/CryptInject also use other methods like malign advertisements, drive-by-download, and software exploits.

Once Trojan:Win32/CryptInject runs on the computer, the virus instills some files on the system folders. It also produces a boot element by adding an entry to the Windows registry which executes the virus code in the boot process.


Trojan:Win32/CryptInject encrypts virtually all files on the computer except executables, system files and apps. It uses an asymmetric type of encryption, which is painful to decrypt and actively need a decryption tool and key to get back all the infected files.

The design of Trojan:Win32/CryptInject focuses primarily on its goal of encrypting files of computer users such as Office documents, images, photos, videos, databases, archives, etc. The encryption process literally renders these files inaccessible and attackers are using this situation to extort money from the victims.

Variants of Trojan:Win32/CryptInject

Trojan:Win32/CryptInject.YP!MTB – The database was updated to add this variant on June 18, 2019. It appears that this virus is concealing itself inside a protected folders like the following:

  • X:\WindowsApps\Microsoft.MSPhoenix_101.101.39515.0_x64__8wekyb3d8bbwe\Game\wwise\fr\928876185.wem

The identified Trojan:Win32/CryptInject.YP!MTB file 928876185.wem may vary. Hence, it is usually in the format of [random characters].wem.

Trojan:Win32/CryptInject!ml – This variant was added on July 22, 2020 to cover newer variants of the hazardous Trojan. It was noted that there are some modifications especially on how it encrypts the target files.

List of Variants

List of Ransom:Win32/Ryuk Variants
Version NameAlert LevelDate Added
Trojan:Win32/CryptInject.DSevereApr 22, 2018
Trojan:Win32/CryptInject.ASevereJul 05, 2018
Trojan:Win32/CryptInject!rfnSevereJul 05, 2018
Trojan:Win32/CryptInject.TSevereJul 30, 2018
Trojan:Win32/CryptInject!MTBSevereSep 05, 2018
Trojan:Win32/CryptInject.AN!MTBSevereSep 21, 2018
Trojan:Win32/CryptInject.CSevereJan 30, 2019
Trojan:Win32/CryptInject.YI!MTBSevereMay 17, 2019
Trojan:Win32/CryptInject.BD!MTBSevereSep 10, 2019
Trojan:Win32/CryptInject.SP!MSRSevereOct 17, 2019
Trojan:Win32/CryptInject.BI!rfnSevereDec 14, 2019
Trojan:Win32/CryptInject.PVK!rfnSevereDec 14, 2019
Trojan:Win32/CryptInject.YU!rfnSevereDec 14, 2019
Trojan:Win32/CryptInject.AS!rfnSevereJan 03, 2020
Trojan:Win32/CryptInject.VDSK!rfnSevereJan 28, 2020
Trojan:Win32/CryptInject!ctvSevereFeb 01, 2020
Trojan:Win32/CryptInject.AX!MTBSevereFeb 11, 2020
Trojan:Win32/CryptInject.SM!MSRSevereMar 02, 2020
Trojan:Win32/CryptInject.PI!MTBSevereMar 12, 2020
Trojan:Win32/CryptInject.DSA!MTBSevereJun 09, 2020
Trojan:Win32/CryptInject.RBB!MTBSevereJun 23, 2020
Trojan:Win32/CryptInject.SN!rfnSevereJun 26, 2020
Trojan:MSIL/CryptInject.KSSevereJul 20, 2020
Trojan:Win32/CryptInject.DA!MTBSevereMar 23, 2020
Trojan:Win32/CryptInject!ibtSevereAug 07, 2020
Trojan:Win32/CryptInject.AW!MTBSevereAug 26, 2020
Trojan:Win32/Cryptinject.DSK!MTBSevereAug 27, 2019
Trojan:Win32/CryptInject.SSevereAug 28, 2020
Trojan:Win32/CryptInject.DSB!MTBSevereSep 11, 2020
Trojan:Win32/CryptInject.DSB!rfnSevereSep 16, 2020
Trojan:Win32/CryptInject.AR!MTBSevereAug 14, 2020
Trojan:Win32/CryptInject.Q!MTBSevereOct 22, 2020
Trojan:Win32/CryptInject.PO!MTBSevereOct 30, 2020
For complete details including full list of Trojan:Win32/CryptInject variants, please refer to this Microsoft Security Intelligence page

How to remove Trojan:Win32/CryptInject?

To totally remove Trojan:Win32/CryptInject 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 Trojan:Win32/CryptInject Instantly

To instantly remove Trojan:Win32/CryptInject, we suggest that you scan the infected computer with this powerful anti-malware tool. It can detect and get rid of Trojans, viruses, malware, and adware from the infected computer. To fully protect the computer against Trojan:Win32/CryptInject or similar attack, you can activate Malwarebytes to have real-time scanning and complete defense against all forms of threats.

1. Download Malwarebytes Anti-Malware from the link below. Save the file on your hard drive.

2. Once the download completes, double-click on the file MBSetup.exe to run the program.

3. Select desired installation package whether for Personal Computer or Work Computer.

4. On next window, click Install button to proceed.

MBAM Default Install

5. Just proceed with the succeeding prompts until it start to execute the installation procedure.

6. Installation process will take less than a minute. It should run automatically after completing the setup.

7. When Malwarebytes Anti-Malware interface appears, please select Scan on the menu. The program will check for any available update before proceeding. Do not skip this step. Virus scan may take a while, please wait for the process to finish.


8. When scanning is done, Malwarebytes Anti-Malware will display the list of identified threats. Remove all and restart the computer to finalized the scan process.

After executing the above instructions, Trojan:Win32/CryptInject 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 Trojan:Win32/CryptInject. For Windows 8 and 10 users, please run Windows Defender. Users of Windows Vista and older versions can utilize Microsoft Security Essentials to remove Trojan:Win32/CryptInject virus.

Windows 8 / 10 Instructions:

Windows Defender is a free tool that was built help you remove Trojan:Win32/CryptInject, 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 Trojan:Win32/CryptInject


2. On the Home tab, click Full under Scan Options. Click Scan now to start scanning for presence of Trojan:Win32/CryptInject. The process may take a while to complete.


3. After the scan, delete/quarantine identified threats wether it is relevant to Trojan:Win32/CryptInject 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 Trojan:Win32/CryptInject 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 Trojan:Win32/CryptInject items, viruses, and malware on the PC. Scan may take a while, please be patient and wait for the process to end.

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