How NOT to f-up your security incident response

This feature article outlines common incident response failures—such as confirmation bias, narrow scoping, rushing remediation, and poor evidence preservation—highlighted by an anonymized Fortune 1000 breach where initial access via SQL injection and directory traversal was misattributed. Experts from Microsoft, Mandiant, and CrowdStrike recommend disciplined scoping, creating timelines, preserving volatile data and logs, coordinating across vendors, maintaining a rehearsed IR plan and retainer, modernizing legacy systems, and rebuilding compromised hosts to prevent reinfection, with specific emphasis on the added complexity of ransomware and data exfiltration.