Ransom.RobbinHood

Short bio

Ransom.RobbinHood is Malwarebytes’ detection name or a type of ransomware that is used in targeted attacks against enterprises and organizations.

robbinhood ransom note

Ransom.RobbinHood ransom note

Type and source of infection

Ransomware is a category of malware that holds files or systems hostage for ransom. When encrypting files, an AES key is created for each file. The ransomware will then encrypt the AES key and the original filename with the public RSA encryption key and append it to the encrypted file.
Ransom.RobbinHood is used in targeted attacks, where the threat actors make sure that essential files are encrypted so they can ask for large ransom amounts. Ransom.RobbinHood has been know to use a digitally signed driver and exploit a vulnerability in this legitimate driver to gain kernel access.

Aftermath

Because of the targeted nature of this ransomware, it is advised to do a full network scan to find any backdoors or other tools that the threat actors may have left behind, and which may enable them to regain access to the network.

Protection

Malwarebytes protects business and home users from Ransom.RobbinHood by using Anti-Ransomware technology and real-time protection.

realtime protevtion

Malwarebytes Real-time protection blocks Ransom.RobbinHood

ARW detection

Malwarebytes Anti-Ransomware recognizes and stops ransomware behavior.

Home remediation

Malwarebytes can detect and remove Ransom.Megacortex without further user interaction.

  1. Please download Malwarebytes to your desktop.
  2. Double-click MBSetup.exe and follow the prompts to install the program.
  3. When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
  4. Click on the Get started button.
  5. Click Scan to start a Threat Scan.
  6. Click Quarantine to remove the found threats.
  7. Reboot the system if prompted to complete the removal process.

Take note, however, that removing this ransomware does not decrypt your files. You can only get your files back from backups you made before the infection happened.

Business remediation

How to remove Ransom.RobbinHood with the Malwarebytes Nebula console

You can use the Malwarebytes Anti-Malware Nebula console to scan endpoints.

endpoint menu Nebula endpoint tasks menu

Choose the Scan + Quarantine option. Afterwards you can check the Detections page to see which threats were found.

Nebula detections

On the Quarantine page you can see which threats were quarantined and restore them if necessary.

Nebula Quarantaine

All component/technology detections are passed to the remediation engine for complete removal from infected systems. This industry leading technology uses patented techniques in identifying all cohorts or associated files for a single threat and removes them all together to prevent malware from resuscitating itself. If you are using Malwarebytes Ransomware Rollback technology, it allows you to wind back the clock to negate the impact of ransomware by leveraging just-in-time backups.

IOCs

Files SHA256 hashes:

  • 791c32a95f401f7464214960e49e716656f6fd6fff135ac2a6ba607236d3346e
  • 99c3cc348f8ee4e87bce45b1dd185d31830c370ac43fd3e39ac50340f029ef79
  • e9188ace227b00cbf1f6fba3ceb32af8e4d456c3a0815300a224a9d9e00778a8
  • 47d892da6a49b02a2904bdc0d03ecef66c076481d19ab19251d86d11be494765

Encrypted files are stored with the extension enc_robbinhood

 

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