| Name | Trojan.Ransomcrypt.S |
| Type | Ransomware |
| Short Description | Encrypts important user data and demands ransom in return. |
| Symptoms | The user may have his files encrypted without his consent and may see a ransom note with instructions on how to pay for them. |
| Distribution Method | Malicious Links Spam Mail |
| Detection Tool | Download Malware Removal Tool, to See If Your System Has Been Affected by malware |
| User Experience | Join our forum to follow the discussion about the Trojan.Ransomcrypt Variants. |
A 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:
→65.49.8.104
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 https://sensorstechforum.com/help_decrypt-files-description-and-removal/) file that contains the same instructions such as the CyptoWall(HL https://sensorstechforum.com/remove-cryptowall-3-0-and-restore-the-encrypted-files/) 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:
https://sensorstechforum.com/restore-files-encrypted-via-rsa-encryption-remove-cryptowall-and-other-ransomware-manually/
https://sensorstechforum.com/remove-rsa-2048-encryption-key-from-cryptowall-3-0/
Scan and remove ransomware via a live OS:
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
1. Install SpyHunter to scan for and remove Trojan.Ransomcrypt.S.2. Scan with SpyHunter to Detect and Remove Trojan.Ransomcrypt.S.
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 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 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 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 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.
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.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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Preparation before removing Trojan.Ransomcrypt.S.
Before starting the actual removal process, we recommend that you do the following preparation steps.
- Make sure you have these instructions always open and in front of your eyes.
- Do a backup of all of your files, even if they could be damaged. You should back up your data with a cloud backup solution and insure your files against any type of loss, even from the most severe threats.
- Be patient as this could take a while.
- Scan for Malware
- Fix Registries
- Remove Virus Files
Step 1: Scan for Trojan.Ransomcrypt.S with SpyHunter Anti-Malware Tool
Step 2: Clean any registries, created by Trojan.Ransomcrypt.S on your computer.
The usually targeted registries of Windows machines are the following:
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
You can access them by opening the Windows registry editor and deleting any values, created by Trojan.Ransomcrypt.S there. This can happen by following the steps underneath:
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.Step 3: Find virus files created by Trojan.Ransomcrypt.S on your PC.
1.For Windows 8, 8.1 and 10.
For Newer Windows Operating Systems
1: On your keyboard press + R and write explorer.exe in the Run text box and then click on the Ok button.
2: Click on your PC from the quick access bar. This is usually an icon with a monitor and its name is either “My Computer”, “My PC” or “This PC” or whatever you have named it.
3: Navigate to the search box in the top-right of your PC's screen and type “fileextension:” and after which type the file extension. If you are looking for malicious executables, an example may be "fileextension:exe". After doing that, leave a space and type the file name you believe the malware has created. Here is how it may appear if your file has been found:
N.B. We recommend to wait for the green loading bar in the navigation box to fill up in case the PC is looking for the file and hasn't found it yet.
2.For Windows XP, Vista, and 7.
For Older Windows Operating Systems
In older Windows OS's the conventional approach should be the effective one:
1: Click on the Start Menu icon (usually on your bottom-left) and then choose the Search preference.
2: After the search window appears, choose More Advanced Options from the search assistant box. Another way is by clicking on All Files and Folders.
3: After that type the name of the file you are looking for and click on the Search button. This might take some time after which results will appear. If you have found the malicious file, you may copy or open its location by right-clicking on it.
Now you should be able to discover any file on Windows as long as it is on your hard drive and is not concealed via special software.
Trojan.Ransomcrypt.S FAQ
What Does Trojan.Ransomcrypt.S Trojan Do?
The Trojan.Ransomcrypt.S Trojan is a malicious computer program designed to disrupt, damage, or gain unauthorized access to a computer system. It can be used to steal sensitive data, gain control over a system, or launch other malicious activities.
Can Trojans Steal Passwords?
Yes, Trojans, like Trojan.Ransomcrypt.S, can steal passwords. These malicious programs are designed to gain access to a user's computer, spy on victims and steal sensitive information such as banking details and passwords.
Can Trojan.Ransomcrypt.S Trojan Hide Itself?
Yes, it can. A Trojan can use various techniques to mask itself, including rootkits, encryption, and obfuscation, to hide from security scanners and evade detection.
Can a Trojan be Removed by Factory Reset?
Yes, a Trojan can be removed by factory resetting your device. This is because it will restore the device to its original state, eliminating any malicious software that may have been installed. Bear in mind that there are more sophisticated Trojans that leave backdoors and reinfect even after a factory reset.
Can Trojan.Ransomcrypt.S Trojan Infect WiFi?
Yes, it is possible for a Trojan to infect WiFi networks. When a user connects to the infected network, the Trojan can spread to other connected devices and can access sensitive information on the network.
Can Trojans Be Deleted?
Yes, Trojans can be deleted. This is typically done by running a powerful anti-virus or anti-malware program that is designed to detect and remove malicious files. In some cases, manual deletion of the Trojan may also be necessary.
Can Trojans Steal Files?
Yes, Trojans can steal files if they are installed on a computer. This is done by allowing the malware author or user to gain access to the computer and then steal the files stored on it.
Which Anti-Malware Can Remove Trojans?
Anti-malware programs such as SpyHunter are capable of scanning for and removing Trojans from your computer. It is important to keep your anti-malware up to date and regularly scan your system for any malicious software.
Can Trojans Infect USB?
Yes, Trojans can infect USB devices. USB Trojans typically spread through malicious files downloaded from the internet or shared via email, allowing the hacker to gain access to a user's confidential data.
About the Trojan.Ransomcrypt.S Research
The content we publish on SensorsTechForum.com, this Trojan.Ransomcrypt.S how-to removal guide included, is the outcome of extensive research, hard work and our team’s devotion to help you remove the specific trojan problem.
How did we conduct the research on Trojan.Ransomcrypt.S?
Please note that our research is based on an independent investigation. We are in contact with independent security researchers, thanks to which we receive daily updates on the latest malware definitions, including the various types of trojans (backdoor, downloader, infostealer, ransom, etc.)
Furthermore, the research behind the Trojan.Ransomcrypt.S threat is backed with VirusTotal.
To better understand the threat posed by trojans, please refer to the following articles which provide knowledgeable details.