Protect Against Ransomware

What is RansomWare?

Ransomware is a form of malware that infects devices, networks, and data centers and prevents them from being used until the user or organization pays a ransom to have the file or server unlocked. Ransomware has been around since at least 1989, when the “PC Cyborg” trojan encrypted file names on a hard drive. However, in recent years, ransomware attacks have become increasingly complex, targeted, and lucrative crime. Digital currency like Bitcoins are usually used as the main mode of payment.

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How does RansomWare work?

 

 

 

 

 

 

 

 

 

 

 

 

 

How to Protect Against Ransomware?

  • Mail Hosting Services

  • Firewall

    • Disable Remote Desktop (RDP) Connection

      • If RDP is necessary, then

        • use 2FA in SSL VPN Connection

        • Apply Security Hardening for RDP

    • Restrict any outbound connection to Command and Control (C&C) Server

  • Server

    • Disable Remote Desktop (RDP) Connection

      • If RDP is necessary, then

        • use 2FA in SSL VPN Connection

        • Apply Security Hardening for RDP

        • In Group Policy

          • Strengthen Encryption for RDP

          • Lockout Account after 5 number of unsuccessful attempt with a 60 min timeout period

    • Enable Volume Shadow Copy

      • Creating scheduled automatic restore point creation

      • Disabling by Renaming VSSAdmin

    • Perform Multi-Version

      • Local Data Backup to NAS (by IP address, not by mapped drive)

      • Remote Data Backup to Cloud

  • Workstation

    • Deploy Endpoint Security Software that can restrict and control application

    • Show File Extension

    • Perform OS and application patches or updates.

    • Enable Firewall

    • Disable Windows Script Host

    • Disable Powershell

    • Disable Macros in Office

    • Disable ActiveX on Browser

    • Install Browser Addon to block Popups or Adwares

    • Use strong password

    • Enable Malware or Virus Scan for compressed and archived files

    • Disable File Sharing

    • Switch off remote services – remote desktop and remote assistance

    • Deactivate Autoplay

    • Switch off unused connection – wireless, bluetooth, infrared.

    • Define Software Restriction Policies that keep executable files from running when they are in specific locations in the system.

      • The directories most heavily used for hosting malicious processes include ProgramData, AppData, Temp and Windows\SysWow.

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