Order of Volatility and Evidence Acquisition
Understand why volatile data (RAM, running processes) must be captured before disk images, and how to use write blockers and imaging tools correctly.
Digital Forensics Fundamentals
Digital forensics is the application of scientific methods to collect, preserve, analyze, and present digital evidence in a legally admissible manner. Forensic investigators reconstruct attack timelines, identify the root cause of incidents, and recover deleted or hidden data. The field operates under strict procedural requirements because evidence that is mishandled — even technically — may be inadmissible in legal proceedings. Forensics bridges the technical and legal worlds.
Order of Volatility
The order of volatility defines the sequence in which digital evidence should be collected, from most volatile (disappears soonest) to least volatile (persists longer). Forensic investigators always collect the most volatile data first because it will be lost when the system is powered off or rebooted. Collecting in the wrong order destroys evidence that could have been captured. The RFC 3227 standard provides a widely adopted volatility ordering for forensic procedures.
# Order of volatility (most -> least volatile)
# 1. CPU registers and cache
# 2. Routing tables, ARP cache, process table, kernel stats
# 3. Memory (RAM) — volatile, lost on power-off
# 4. Temporary filesystem / swap space
# 5. Data on local disk
# 6. Remote logging data / SIEM
# 7. Physical configuration / network topology
# 8. Archival media (backups, tapes)
# ALWAYS capture items at the top before the bottomAll lessons in this course
- Order of Volatility and Evidence Acquisition
- Chain of Custody and Legal Admissibility
- Windows Forensic Artifacts: Registry, Event Logs, and Prefetch
- Network and Memory Forensics