Ransomware Incident Response: The First 60 Minutes Containment Playbook
A battle-tested operational guide for security teams facing active ransomware deployment, encryption, and double extortion.
1. The Anatomy of Modern Ransomware Operations
Modern enterprise ransomware is rarely an automated worm. Threat actors dwell in networks for days or weeks (Mean Time to Detect: 10-14 days), conducting reconnaissance, exfiltrating intellectual property, and locating backup repositories before detonating the encryptor payload.
This double and triple extortion model requires incident response teams to treat ransomware not just as a file recovery problem, but as a severe data breach.
2. The Initial 60 Minutes Checklist
Minute 0-15: Confirm the alert. Validate file extension changes, ransom notes, and abnormal disk I/O activity.
Minute 15-30: Immediate network isolation. Disconnect network interfaces on infected machines. Block lateral communication between Active Directory tiers.
Minute 30-45: Preserve evidence. Capture volatile RAM from patient-zero systems to allow forensic memory extraction.
Minute 45-60: Verify backup integrity. Ensure immutable and offline air-gapped backups have not been compromised or encrypted.
3. Volatile Evidence Preservation Command
Before taking any disruptive remediation action, capture memory artifacts for incident analysis using standard forensic toolkits.
# Isolate machine network adapter without rebooting
Disable-NetAdapter -Name "Ethernet0" -Confirm:$false
# Inspect suspicious active high-CPU processes
Get-Process | Sort-Object CPU -Descending | Select-Object -First 10 Id, ProcessName, CPU, Path4. Recovery and Eradication
Never pay ransoms blindly. Consult federal law enforcement (FBI / CISA) and check the 'No More Ransom' repository for publicly available decryptor keys.
Rebuild affected systems from trusted golden images rather than attempting to clean existing infected operating system installations.