Ransom.Crysis

Ransom.Crysis is a detection by Symantec to identify a specific strain of ransomware that is able to lock files on the computer with RSA-AES technology. Normally, this kind of virus spreads over the internet using different methods like spam emails, web injection, botnets, pirated software, serial key generators, and fake software updates. Once Ransom.Crysis infiltrates the computer, it locates target files and encrypts them with a highly sophisticated technique that makes it inoperable.

How does it infect the computer?

Ransom.Crysis is distributed as malicious attachments in spam email messages. There are also versions of this spam email where, instead of attaching files, the attackers will instead place links on the message that, when clicked, will trigger the download of Ransom.Crysis from a remote server. Other victims claim that the virus was able to infect the computer after downloading and installing freeware where Ransom.Crysis is embedded.

Once Ransom.Crysis is executed, it drops several malicious files on the computer. Then, it maintains start-up loading by adding an entry to the Windows registry. The focal point of the attack kicks in by encrypting all but system files and malware data on the computer. By using a strong encryption algorithm, which is AES-256 and RSA-1024, there is very little to no chance of recovering the Ransom.Crysis-infected files without the matching key combination and a decryption tool.

How does this malware operate?

After completing the encryption stages, Ransom.Crysis drops a ransom note on the desktop or folders where encrypted files are stored. The document provides the contact details of attackers and instructions on how victims can decrypt the entire infected file. As usual, the actors behind Ransom.Crysis are requiring ransom payments in exchange for the decryption tool and key.

Technical Details
Virus Name Ransom.Crysis
Detected by Symantec Antivirus
Threat Type CrySis Ransomware, Dharma
Applies to Flyu, Cve, Fresh, Smpl, Team
Similar Detections Acronis : Suspicious
Ad-Aware : Trojan.Ransom.Crysis.A
AhnLab-V3 : Trojan/Win32.Crysis.R213980
ALYac : Trojan.Ransom.Crysis.A
Antiy-AVL : Trojan/Win32.AGeneric
SecureAge APEX : Malicious
Arcabit : Trojan.Ransom.Crysis.A
Avast : Win32:RansomX-gen
Avira (no cloud) : TR/Dropper.Gen
BitDefender : Trojan.Ransom.Crysis.A
BitDefenderTheta : AI:Packer
Bkav : W32.RansomeDNZ.Trojan
CAT-QuickHeal : Ransom.Crysis
ClamAV : Win.Trojan.Dharma
Comodo : TrojWare.Win32.Crysis.A
CrowdStrike Falcon : Win/malicious_confidence_100% (D)
Cyren : W32/Trojan.ILHO-9216
DrWeb : Trojan.Encoder.3953
Emsisoft : Trojan.Ransom.Crysis.A
eScan : Trojan.Ransom.Crysis.A
ESET-NOD32 : A Variant Of Win32/Filecoder.Crysis
F-Secure : Trojan.TR/Dropper.Gen
FireEye : Generic.mg.0c4cbf1cb8e5065f
Fortinet: W32/Crysis.W!tr.ransom
GData : Win32.Trojan-Ransom.VirusEncoder.A
Ikarus : Trojan-Ransom.Crysis
Jiangmin : Trojan.Crypren.ic
Kaspersky : Trojan-Ransom.Win32.Crusis
Malwarebytes : Ransom.Crysis
MaxSecure : Trojan-Ransom.Win32.Crusis
McAfee: Ransom-Dharma!0C4CBF1CB8E5
McAfee-GW-Edition : BehavesLike.Win32.RansomDharma
Microsoft : Ransom:Win32/Wadhrama
NANO-Antivirus : Trojan.Win32.Filecoder
Panda : Trj/GdSda.A
Qihoo-360 : HEUR/QVM20.1.52E1.Malware.Gen
Rising: Ransom.Crysis!1.A
SentinelOne : DFI (malicious PE)
Sophos AV : Troj/Criakl-A
Sophos ML : ML/PE-A + Troj/Criakl-A
SUPERAntiSpyware : Ransom.Crysis/Variant
TACHYON : Ransom/W32.crysis
TrendMicro : Ransom.Win32.CRYSIS.A
TrendMicro-HouseCall : Ransom.Win32.CRYSIS.A
Webroot : W32.Ransom.Gen
ZoneAlarm : Trojan-Ransom.Win32.Crusis

How to remove Ransom.Crysis?

To totally remove Ransom.Crysis from the computer and get rid of relevant viruses and trojans, please execute the procedures as stated on this page. Make sure that you have completely scanned the system with the suggested malware removal tools and virus scanners.

Step 1 : Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted computer security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of computer virus like Ransom.Crysis through this procedure.

1. Download the application from the following page:

2. Save the file to your preferred location.

3. Double-click the downloaded file CCSetup.exe and install with the default settings.

4. At the end of the setup process, click Finish to run Combo Cleaner.

5. The tool will update the database file; please wait for this process to complete.

6. To begin checking for threats like Ransom.Crysis, click on the Start Scan button. Wait for this scan to finish.

Screenshot of Combo Cleaner PC

7. At the end of the scan process, click on Remove all threats to delete Ransom.Crysis malware, including all malicious objects from the computer.

To fully optimize the features of antivirus and privacy scanners, users may have to upgrade to the premium version.

Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the computer virus and malicious items linked to it.

Step 2 : Start Windows in Safe Mode With Networking

The method of running Windows in Safe Mode before running a virus scan is effective in getting rid of Ransom.Crysis. This process can prevent most viruses and malware from loading, making it easier to detect and remove them.

1. On the Windows Search bar, please type msconfig.

Screenshot of Win 11 Search

2. Select and open System Configutation on the list of found results.

3. Once you are in the System Configuration window, go to the Boot tab.

Screenshot of Msconfig Win 11

4. Under the Boot Options area, please check Safe Boot so that it starts in Safe Mode after restarting.

5. Next, select Network. This will allow Windows to boot in Safe Mode with Networking.

6. Lastly, click on Apply and OK to save the changes.

7. Please restart Windows.

Do not forget to restore the normal boot process of Windows after running the virus scan. Simply repeat the method above, and this time, uncheck the Safe Boot option to run Windows normally.

Step 3 : Run Sophos Home Virus Scanner

To remove Ransom.Crysis automatically, scanning the computer with this powerful virus and malware removal tool is recommended. This scanner does not just uncover known threats like viruses or malware; it is also effective in discovering harmful files associated to Ransom.Crysis.

1. Please click on the link below to download the program.

2. After downloading, locate the file SophosInstall.exe in the Downloads folder.

3. Install by double-clicking on the file.

4. If it prompts "Do you want to allow this app to make changes on your device?" please click Yes.

5. Next, it will display the Terms and Conditions page. Click the Install button to begin.

Screenshot of Terms by Sophos Home

6. Run the installation with the default settings. Please note that an internet connection is required in order to download important updates.

7. After finishing the installation, you must login to the dashboard. If you already have a Sophos account, please login. Otherwise, please enter your details and click on the Create Account button.

8. Once you are in the Sophos Home console, click the Scan button to start checking the computer for Ransom.Crysis components.

Screenshot of Sophos Home

9. Scanning may take a while; please wait for this process to finish.

10. After scanning the computer, Sophos Home will start cleaning or deleting files infected with Ransom.Crysis.

11. You may now close Sophos Home. The computer is now free from Ransom.Crysis, as well as associated malware and viruses.

After executing the above instructions, Ransom.Crysis should have been completely removed from the computer. If there are still signs of infection or the computer is displaying unusual behaviors, please continue with the remaining procedures.

Another alternative for Windows 10/11 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Step 4 : Double Check with Windows Security Apps

Microsoft Windows has a built-in security application that you can use to double-check if your computer is still infected with Ransom.Crysis. For Windows 10/11 users, please run Windows Security.

Windows 10 / 11 Instructions:

Windows Security is a free tool that was built to help you remove Ransom.Crysis, viruses, and other malicious items from Windows 10/11 systems. Follow these procedures to scan your computer with the tool:

1. Tap or click the Search charm and search for Windows Security

2. Click Open to run the program.

Screenshot of Win 11 Search

3. On the Dashboard, click Virus and threat protection from the sidebar.

Screenshot of Win 11 Virus Protection

4. On the right panel, click on Scan Options to see different levels of checking the computer.

5. Next, please select Full Scan button.

Screenshot of Full Scan Win 11

6. Lastly, click on the Scan now button to start scanning for the presence of Ransom.Crysis. The process may take a while to complete.

7. After the scan, Delete/Quarantine identified threats, whether they were relevant to Ransom.Crysis or not. You may now restart Windows to complete the virus removal process.

For Windows 8.1 and Windows 7, you can scan the computer for free with the Microsoft Malicious Software Removal Tool (MSRT 64-Bit). It is a stand-alone virus scanner tool that targets prevalent malware groups.

About the author

Leave a Comment

Your email address will not be published. Required fields are marked *