What is DFIR (Digital Forensics & Incident Response)?
DFIR (Digital Forensics and Incident Response) is the combined practice of investigating digital evidence and coordinating the response to a cybersecurity incident, so an organization can understand what happened, contain it, and recover.
DFIR brings together two disciplines. Digital forensics is the methodical collection and analysis of evidence from systems, memory, and networks. Incident response is the operational process of detecting, containing, eradicating, and recovering from an attack. Together they answer who, what, when, and how.
What is the DFIR process?
Most teams follow a lifecycle similar to the SANS or NIST incident response models:
| Phase | Goal |
|---|---|
| Preparation | Have tooling, logging, and a plan ready |
| Identification | Detect and confirm an incident |
| Containment | Stop the spread |
| Eradication | Remove the attacker and root cause |
| Recovery | Restore normal operations |
| Lessons learned | Improve defenses |
Common DFIR tools and techniques
Investigators capture and analyze disk images, build super-timelines of artifacts (for example with the plaso and log2timeline tooling), and examine RAM with the volatility framework. They review Windows event logs, registry hives, browser history, and network captures to reconstruct an intrusion, often mapping attacker behavior to the MITRE ATT&CK framework.
How to practice DFIR hands-on
DFIR is best learned by investigating a real compromised machine. On Purple Edge the dfir learning hub seeds lab environments with intrusion artifacts so you can perform triage, build timelines, and analyze evidence in a live cloud range instead of reading about it.
Practice this in the Learn Digital Forensics and Incident Response (DFIR) learning path.
Put this into practice
Spin up real Kali, Ubuntu and Windows labs in your browser and learn by doing. Guided, hands-on, no setup.
Last updated: 2026-06-16