Evidence triage, hashes, and reproducible artifact handling

Mechanism

Forensic analysis starts with preserving the artifact and its provenance. Hashes detect changes but do not establish who created a file or whether its contents are trustworthy. Keep source material separate from extracted or transformed outputs, and record tools and commands so a finding can be independently reproduced.

Practical method

Create a working copy, compute hashes, and inventory size, type, and timestamps. Identify container formats before extracting them. Record each transformation and keep outputs under distinct names. Analyze a representative subset before running recursive extraction that could consume large resources.

sha256sum evidence.bin
file evidence.bin
stat evidence.bin

Interpreting evidence

A defensible finding links an observed byte range or record to the original artifact hash. Keep offsets and parsing assumptions alongside screenshots or extracted text.

Pitfalls and limits

Timestamps can be manipulated and depend on timezone and filesystem semantics. File extensions are only labels. Automatic parsers may modify metadata or execute helpers, so select read-only operations deliberately.