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🔄 Hybrid Environment Incident Response Plan
Prepare: Align cloud and on-prem into one playbook, one vision.
Detect: Correlate signals from both environments into actionable insight.
Contain: Act fast and isolate precisely across virtual and physical borders.
Eradicate: Remove all traces and vulnerabilities—everywhere.
Recover: Restore only what’s clean and trusted.
Learn: Strengthen the seams between worlds and rise wiser.
Framework
Framework
1️⃣ Preparation
1️⃣ Preparation
“A hybrid battlefield demands a unified defense.”
🛠️ What to Do:
🛠️ What to Do:
Unify IR Playbooks for both cloud and on-prem systems (Azure + datacenter).
Ensure logging & visibility in both domains:
Cloud: Azure Monitor, AWS CloudTrail, GCP Logging
On-Prem: Sysmon, Windows Event Logs, Linux auditd
Centralize into one SIEM (e.g., Microsoft Sentinel, Splunk, Elastic)
Define cross-functional roles: SecOps, DevOps, CloudOps, and IT
Conduct hybrid tabletop simulations (e.g., cloud VM breach + on-prem pivot)
2️⃣ Detection & Analysis
2️⃣ Detection & Analysis
“Wherever the signal comes from, your insight must follow.”
🛠️ What to Do:
🛠️ What to Do:
Correlate alerts from:
Cloud-native tools (Defender for Cloud, GuardDuty)
EDR/XDR tools (CrowdStrike, SentinelOne)
Network-level logs from firewalls, proxies, VPNs
Use MITRE ATT&CK to understand tactics across hybrid kill chains
Enhance triage with SOAR playbooks that pull context from both realms
Classify incident: cloud misconfig, on-prem malware, lateral movement?
3️⃣ Containment
3️⃣ Containment
“Speed, precision, and isolation—across two worlds.”
🛠️ What to Do:
🛠️ What to Do:
Cloud:
Lock user accounts, disable exposed API keys
Isolate infected cloud VMs or containers
On-Prem:
Disconnect compromised devices from the network
Segment VLANs or subnets
Use unified firewall policies and conditional access controls
Snapshot affected assets (cloud disks, VMs, on-prem images)
4️⃣ Eradication
4️⃣ Eradication
“No shadows left in the datacenter. No backdoors in the cloud.”
🛠️ What to Do:
🛠️ What to Do:
Patch exploited vulnerabilities in cloud services or internal apps
Rebuild affected systems:
Cloud: Redeploy from clean IaC templates (Terraform, Bicep)
On-Prem: Re-image endpoints or servers
Rotate keys, reset credentials, and validate IAM and GPO policies
Remove persistence mechanisms (cron jobs, registry keys, Lambda triggers)
5️⃣ Recovery
5️⃣ Recovery
“Bring operations back online with trust—not haste.”
🛠️ What to Do:
🛠️ What to Do:
Restore systems gradually, based on criticality and confidence
Validate with endpoint baselines, integrity checks, and traffic monitoring
Monitor for signs of re-entry across:
Cloud telemetry (e.g., unexpected login locations)
On-prem behaviors (e.g., beaconing, lateral scans)
Inform stakeholders and regulators (if breach occurred)
6️⃣ Lessons Learned
6️⃣ Lessons Learned
“This wasn’t just an incident—it was an education.”
🛠️ What to Do:
🛠️ What to Do:
Conduct blameless retrospectives—include both cloud and on-prem teams
Create or refine:
Detection rules
IR runbooks
SOAR automation
Update access policies and tooling strategy:
Were VPN gaps exploited?
Did a cloud misconfig go unnoticed?
Present a cross-domain improvement report to leadership
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