How Hack: Ransomware Fire Drill Workshop – Practical Recovery Tactics

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You Should Know:

Ransomware attacks are escalating, and recovery speed is critical. Below are verified commands, tools, and steps to simulate and mitigate ransomware attacks based on the Druva Virtual Ransomware Fire Drill Workshop.

1. Simulating a Ransomware Attack (Linux/Windows)

Use these commands to test your defenses:

Linux (Using openssl for encryption simulation)

 Create a dummy file 
echo "Critical data" > important_file.txt

Simulate ransomware encryption (AES-256) 
openssl enc -aes-256-cbc -salt -in important_file.txt -out important_file.enc -k "maliciouskey"

Verify encryption 
file important_file.enc

Windows (Using PowerShell for attack simulation)

 Create a test file 
"Confidential Data" | Out-File -FilePath C:\Temp\secret.txt

Simulate encryption (AES) 
$key = "RansomwareKey123" 
$content = Get-Content C:\Temp\secret.txt 
$encrypted = ConvertTo-SecureString -String $content -Key (1..32) 
$encrypted | Out-File -FilePath C:\Temp\secret.enc

2. Detecting Ransomware Activity

Linux (Auditd for monitoring file changes)

 Install auditd 
sudo apt install auditd -y

Monitor /etc and /home directories 
sudo auditctl -w /etc -p wa -k ransomware_watch 
sudo auditctl -w /home -p wa -k ransomware_watch

Check logs 
ausearch -k ransomware_watch | aureport -f -i

Windows (Using Sysmon for real-time logging)

 Download Sysmon 
Invoke-WebRequest -Uri "https://download.sysinternals.com/files/Sysmon.zip" -OutFile "C:\Temp\Sysmon.zip"

Extract and configure 
Expand-Archive C:\Temp\Sysmon.zip -DestinationPath C:\Sysmon 
C:\Sysmon\Sysmon.exe -i -h md5 -n -l

3. Recovery Steps (Backup & Restore)

Linux (Using rsync for backups)

 Backup critical files 
rsync -avz --delete /important_data/ /backup/

Restore after attack 
rsync -avz --delete /backup/ /important_data/

Windows (Using WBAdmin for system restore)

 Create a backup 
wbadmin start backup -backupTarget:E: -include:C:\Data -quiet

Recover from backup 
wbadmin start recovery -version:01/01/2025-12:00 -itemtype:file -items:C:\Data\ -recoveryTarget:C:\

4. Preventative Measures

  • Linux (Disable unnecessary services) 
    sudo systemctl stop smbd 
sudo systemctl disable smbd
  • Windows (Enable Controlled Folder Access) 
    Set-MpPreference -EnableControlledFolderAccess Enabled

Prediction

Ransomware will increasingly target hybrid cloud environments, requiring automated recovery solutions.

What Undercode Say:

Proactive ransomware drills are essential. Use immutable backups, restrict user permissions, and deploy real-time monitoring.

Expected Output:

[/bash]

important_file.enc (encrypted)

ransomware_watch logs (detected modifications)

Backup restored successfully

[bash]

URLs:
– Druva Ransomware Workshop
– Sysmon Download

IT/Security Reporter URL:

Reported By: Alexander Sopov – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅

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