Cloud incident response is the methodology of detecting, investigating, containing, and recovering from security incidents in cloud environments. It adapts traditional incident response frameworks to address cloud-specific challenges including shared responsibility, ephemeral resources, API-driven evidence collection, and multi-account architectures.
Cloud IR follows adapted NIST SP 800-61 phases. Preparation includes pre-deploying forensic tooling, establishing cross-account access for investigators, and maintaining runbooks for common incident types. Detection leverages cloud-native services (GuardDuty, Sentinel, SCC) and centralized SIEM correlation. Analysis uses API-based evidence collection: CloudTrail/audit logs for action attribution, VPC Flow Logs for network analysis, and disk snapshots for forensic examination. Containment strategies include revoking IAM credentials, applying restrictive security groups, disabling compromised accounts, and isolating VPCs. Eradication removes attacker persistence through credential rotation, instance replacement, and infrastructure redeployment from IaC. Recovery validates clean state before restoring service. Cloud-specific challenges include evidence volatility in ephemeral containers, shared-responsibility evidence gaps, and multi-region attack scope. Automation through SOAR platforms triggers containment playbooks within minutes of detection. Post-incident activities include updating detection rules, improving automation, and strengthening preventive controls.
Cloud incidents move faster than traditional infrastructure incidents because attackers use APIs to automate their operations across regions and services simultaneously. The ephemeral nature of cloud resources means evidence disappears when instances terminate or containers restart. Without cloud-adapted IR procedures, organizations lose critical evidence and cannot contain incidents before they spread across the environment.
CDA maps cloud IR to the TID (Threat Intelligence and Defense) domain. Our C-DRILL campaign runs cloud-specific tabletop exercises and red team scenarios. Our missions deploy automated containment playbooks and pre-stage forensic collection tools across all cloud accounts.