performing-file-carving-with-foremost

Run foremost with -t to specify file types, -i pointing to the raw dd image, and -o for the output directory. For deleted files specifically, first extract unallocated space with blkls from Sleuth Kit, then carve that smaller target for faster, cleaner results.

Scalpel is a high-performance rewrite of Foremost using the same header-footer signature approach, making it preferable for large images or time-critical carving. Both use similar configuration files where you uncomment or define file type signatures with headers, footers, and maximum sizes.

Create a custom configuration file with lines defining extension, case sensitivity, max size, header bytes, and optional footer bytes, then pass it with foremost -c. The skill includes examples for docx, sqlite, pst, eml, and evtx signatures.

Fragmentation is the main cause: header-footer carving assumes contiguous data, so files split across non-adjacent clusters recover truncated or stitched with unrelated sectors. Random data matching signatures also creates false positives, so always validate carved output with the file command and by actually opening files.

Carved files have no original names, paths, or filesystem timestamps, so you cannot assert when or where they existed from carving alone. Cross-correlate with $MFT metadata, hash against NSRL and known-bad sets, and reconcile with PhotoRec or bulk_extractor results to establish context.