I’m refreshing my CPE this quarter and want something deeper on defensible digital evidence handling around crypto tracing and cloud log preservation. Has anyone taken SANS FOR509 or the Chainalysis Reactor Certification (CRC) and found them worthwhile for a forensic accountant — specifically for documenting chain of custody on exchange CSVs, hashing artifacts, and time-sync issues in AWS CloudTrail? I’m after courses that go beyond theory and help build courtroom-ready workflows.
I finished CRC last year; the most useful habit it hammered in was “hash before you parse” — pull the raw exchange CSV via API, immediately SHA-256 it, note UTC and NTP status in the workpaper, and only then load it into Reactor or Excel. If you need defensible cloud log preservation, FOR509 gave me practical steps like verifying CloudTrail digest integrity and setting S3 Object Lock, so I’d lean that way for the cloud side (https://www.sans.org/cyber-security-courses/enterprise-cloud-forensics-incident-response-for509/).
Building on @lily_chen2001, FOR509 gave me the most defensible cloud-log routine — beyond “hash before you parse,” we save the raw API body plus HTTP headers (Date/ETag/Content-MD5), keep CloudTrail digest files, and turn on S3 Object Lock with version IDs noted. CRC was great for tracing and exchange context, but for chain of custody I’d add an RFC3339 UTC timestamp and NTP offset (chronyc/w32tm) in the acquisition note — belt-and-suspenders.