A consistent DFIR approach to ransomware, BEC, data breaches, and threat hunting

Key takeaways

• The DFIR lifecycle stays the same from one investigation to the next, but ransomware, BEC, data breaches, and threat hunting each rely on forensics to answer different questions.
• Containing an incident before collecting evidence can cost investigators critical context, like memory that may hold encryption keys or the mailbox activity and forwarding rules that show what a BEC attacker accessed.
• Forensic collection preserves volatile and disk artifacts that EDR tools may miss, only partially sample, or overwrite during response.
• Defining roles across teams, testing collection workflows ahead of time, and grounding post-incident reviews in evidence help teams build forensics into how they respond to incidents.

Cybersecurity incidents are no longer rare events. Today, they are routine, aggressive, and increasingly sophisticated.