Remove Trojan.Ransomcrypt.S Completely - How to, Technology and PC Security Forum |

Remove Trojan.Ransomcrypt.S Completely

Short DescriptionEncrypts important user data and demands ransom in return.
SymptomsThe user may have his files encrypted without his consent and may see a ransom note with instructions on how to pay for them.
Distribution MethodMalicious Links Spam Mail
Detection ToolDownload Malware Removal Tool, to See If Your System Has Been Affected by Trojan.Ransomcrypt.S
User ExperienceJoin our forum to follow the discussion about the Trojan.Ransomcrypt Variants.

PC riskA variant of the Trojan.Ransomcrypt ransomware infection, this partucular trojan is famous for encrypting a wide array of file extensions and leaving a ransom note. This ransom note aims to scare users into paying the ransom via anonymous networks in return for the decryption keys, treatening the files may be lost forever. Experts advise users not to comply in any way with the demands of the cyber croooks because it is no guarantee in any way that the files will be decrypted.

Trojan.Ransomcrypt.S – How Did I Get Infected?

Such types of trojans may be downloaded on your computer via other malicious programs such as trojan.downloaders that may have already infected it. Another way to get them is by either visiting a malicious site that downloads the threat directly onto the user PC or by opening a dangerous spam mail attachment. Users are strongly advised to use spam filters since some emails may also be spoofed and they could think they are from a well known person or a company and fall into the trap.

Trojan.Ransomcrypt.S In Detail

According to Symantec, the .S variant of this trojan is also encrypts certain files on the user PC and leaves a ransom note. Once it has been activated on a target PC, it makes a copy of a malicious .dll file, called reg.dll in the %Temp% folder. After doing so, the Trojan begins tampering with PC settings, creating the following registry object for the copied .dll file:

→HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\”WINUP” = “regsvr32 “%Temp%\reg.dll”

This registry entry aims to make the trojan run every time on system startup. The next step after that is for the trojan to connect to the attackers’ domain. One malicious domain identified by the Symantec threat analysis experts was:


After connecting to remote domain, the cyber threat then downloads these files onto the infected PC’s %Temp% folder:
t0.da0; t0.daa; t0.da1
After downloading the files it most likely uses them to encrypt user files of these formats:

→.txt .html .htm .css .wmv .wallt .odt .ods .odp .odm .odc .odb .doc .docx .docm .wps .xls .xlsx .xlsm .xlsb .xlk .ppt .pptx .pptm .mdb .accdb .pst .dwg .dxf .dxg .wpd .rtf .wb2 .mdf .dbf .psd .pdd .pdf .eps .ai .indd .cdr .jpg .jpe .jpg .dng .3fr .arw .srf .sr2 .bay .crw .cr2 .dcr .kdc .erf .mef .mrw .nef .nrw .orf .raf .raw .rwl .rw2 .r3d .ptx .pef .srw .x3f .der .cer .crt .pem .pfx .p12 .p7b .p7c

Just like CryptoWall Ransomware, the trojan then creates the HELP_DECRYPT.HTML(HL file that contains the same instructions such as the CyptoWall(HL ones.

Remove Trojan.Ransomcrypt.S Fully from Your PC

In order to remove the .S variant of this Trojan from your computer you should guide yourself by the step-by-step instructions below. It is recommended to boot in safe mode and scan your computer with advanced anti-malware tool. Also, for tech-savvy users and for a way to try and decrypt your data check these links:

Methods for decryption:

Scan and remove ransomware via a live OS:

1. Boot Your PC In Safe Mode to isolate and remove Trojan.Ransomcrypt.S

1. Boot Your PC Into Safe Mode

1. For Windows 7,XP and Vista. 2. For Windows 8, 8.1 and 10.

For Windows XP, Vista, 7 systems:

1. Remove all CDs and DVDs, and then Restart your PC from the “Start” menu.
2. Select one of the two options provided below:

For PCs with a single operating system: Press “F8” repeatedly after the first boot screen shows up during the restart of your computer. In case the Windows logo appears on the screen, you have to repeat the same task again.


For PCs with multiple operating systems: Тhe arrow keys will help you select the operating system you prefer to start in Safe Mode. Press “F8” just as described for a single operating system.


3. As the “Advanced Boot Options” screen appears, select the Safe Mode option you want using the arrow keys. As you make your selection, press “Enter“.

4. Log on to your computer using your administrator account


While your computer is in Safe Mode, the words “Safe Mode” will appear in all four corners of your screen.

Step 1: Open the Start Menu


Step 2: Whilst holding down Shift button, click on Power and then click on Restart.
Step 3: After reboot, the aftermentioned menu will appear. From there you should choose Troubleshoot.


Step 4: You will see the Troubleshoot menu. From this menu you can choose Advanced Options.


Step 5: After the Advanced Options menu appears, click on Startup Settings.


Step 6: Click on Restart.

Step 7: A menu will appear upon reboot. You should choose Safe Mode by pressing its corresponding number and the machine will restart.

2. Remove Trojan.Ransomcrypt.S with SpyHunter Anti-Malware Tool

2. Remove Trojan.Ransomcrypt.S with SpyHunter Anti-Malware Tool

1. Install SpyHunter to scan for and remove Trojan.Ransomcrypt.S.2. Scan with SpyHunter to Detect and Remove Trojan.Ransomcrypt.S.
Step 1:Click on the “Download” button to proceed to SpyHunter’s download page.

It is highly recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter.

Step 2: Guide yourself by the download instructions provided for each browser.
Step 3: After you have installed SpyHunter, wait for it to automatically update.


Step1: After the update process has finished, click on the ‘Scan Computer Now’ button.
Step2: After SpyHunter has finished scanning your PC for any Trojan.Ransomcrypt.S files, click on the ‘Fix Threats’ button to remove them automatically and permanently.
Step3: Once the intrusions on your PC have been removed, it is highly recommended to restart it.

3. Remove Trojan.Ransomcrypt.S with STOPZilla AntiMalware

3. Remove Trojan.Ransomcrypt.S automatically with STOPZilla AntiMalware

1. Install STOPZilla Anti Malware to scan for and remove Trojan.Ransomcrypt.S. 2. Scan your PC with STOPZilla Anti Malware to remove all Trojan.Ransomcrypt.S associated files completely.
Step 1: Download STOPZilla by clicking here.
Step 2: A pop-up window will appear. Click on the ‘Save File’ button. If it does not, click on the Download button and save it afterwards.
Step 3: After you have downloaded the setup, simply open it.
Step 4: The installer should appear. Click on the ‘Next’ button.
Step 5: Check the ‘I accept the agreement’ check circle if not checked if you accept it and click the ‘Next’ button once again.
Step 6: Review and click on the ‘Install’ button.
Step 7: After the installation process has completed click on the ‘Finish’ button.
Step 1: Launch STOPZilla if you havent launched it after install.
Step 2: Wait for the software to automatically scan and then click on the ‘Repair Now’ button. If it does not scan automatically, click on the ‘Scan Now’ button.
Step 3: After the removal of all threats and associated objects, you should Restart your PC.

4. Back up your data to secure it against attacks and file encryption by Trojan.Ransomcrypt.S in the future

4. Back up your data to secure it against attacks in the future

Security engineers recommend that you back up your files immediately, preferably on an external memory carrier in order to be able to restore them. In order to protect yourself from Trojan.Ransomcrypt.S (For Windows Users) please follow these simple steps:

1. For Windows 7 and earlier 1. For Windows 8, 8.1 and 10 1. Enabling the Windows Defense Feature (Previous Versions)

1-Click on Windows Start Menu
2-Type Backup And Restore
3-Open it and click on Set Up Backup
4-A window will appear asking you where to set up backup. You should have a flash drive or an external hard drive. Mark it by clicking on it with your mouse then click on Next.
5-On the next window, the system will ask you what do you want to backup. Choose the ‘Let Me Choose’ option and then click on Next.
6-Click on ‘Save settings and run backup’ on the next window in order to protect your files from possible attacks by Trojan.Ransomcrypt.S.

1-Press Windows button + R
2-In the window type ‘filehistory’ and press Enter
3-A File History window will appear. Click on ‘Configure file history settings’
4-The configuration menu for File History will appear. Click on ‘Turn On’. After its on, click on Select Drive in order to select the backup drive. It is recommended to choose an external HDD, SSD or a USB stick whose memory capacity is corresponding to the size of the files you want to backup.
5-Select the drive then click on ‘Ok’ in order to set up file backup and protect yourself from Trojan.Ransomcrypt.S.

1- Press Windows button + R keys.
2- A run windows should appear. In it type ‘sysdm.cpl’ and then click on Run.
3- A System Properties windows should appear. In it choose System Protection.
5- Click on Turn on system protection and select the size on the hard disk you want to utilize for system protection.
6- Click on Ok and you should see an indication in Protection settings that the protection from Trojan.Ransomcrypt.S is on.
Restoring a file via Windows Defense feature:
1-Right-click on the encrypted file, then choose Properties.
2-Click on the Previous Versions tab and then mark the last version of the file.
3-Click on Apply and Ok and the file encrypted by Trojan.Ransomcrypt.S should be restored.

NOTE! Substantial notification about the Trojan.Ransomcrypt.S threat: Manual removal of Trojan.Ransomcrypt.S requires interference with system files and registries. Thus, it can cause damage to your PC. Even if your computer skills are not at a professional level, don’t worry. You can do the removal yourself just in 5 minutes, using a malware removal tool.

Ventsislav Krastev

Ventsislav has been covering the latest malware, software and newest tech developments at SensorsTechForum for 3 years now. He started out as a network administrator. Having graduated Marketing as well, Ventsislav also has passion for discovery of new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management and then Network Administration, he found his passion within cybersecrurity and is a strong believer in basic education of every user towards online safety.

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