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Course 36 - Windows Forensics and Tools | Episode 10: Decoding Metadata and File Internals cover art

Course 36 - Windows Forensics and Tools | Episode 10: Decoding Metadata and File Internals

Course 36 - Windows Forensics and Tools | Episode 10: Decoding Metadata and File Internals

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In this lesson, you’ll learn about: Windows Recycle Bin forensics and deleted file recovery1. Why the Recycle Bin Matters in Forensics
  • Deleting a file in Windows does not immediately erase it
  • Instead, Windows:
    • Moves it to a hidden system structure
    • Renames it
    • Keeps both metadata and data intact
🔹 Key Idea
  • The Recycle Bin is often a hidden evidence repository
2. Core Forensic Insight
  • Deleted files usually remain:
    • On disk (physically intact)
    • With modified references only
👉 Result:
  • Investigators can often recover:
    • Files
    • Paths
    • Deletion timestamps
3. Legacy Windows Recycle Bin (Windows XP and earlier)🔹 Structure Used
  • INFO2 file
  • Stored inside:
    • Recycler folder
🔹 What it contains
  • Original file path
  • File size
  • Deletion order
👉 Key Insight:
  • Acts as an index of deleted files
4. Modern Windows Recycle Bin (Vista → Windows 10)🔹 Structure Used
  • $Recycle.Bin
🔹 File Pair SystemEach deleted file creates two entries:
  • $R file
    • Contains actual file data
  • $I file
    • Contains metadata:
      • Original name
      • Path
      • Deletion timestamp
👉 Key Insight:
  • Data and metadata are split for tracking integrity
5. Windows 10 Forensic Markers🔹 Version Identification
  • $I file headers contain version indicators:
    • 01 → older Windows versions
    • 02 → Windows 10 era
🔹 Why it matters
  • Helps investigators determine:
    • Operating system version
    • Timeline of deletion activity
6. Hex-Level Analysis🔹 Tools used
  • Hex editors
  • Forensic analysis tools
🔹 What investigators extract
  • File paths
  • Deletion timestamps
  • File size metadata
  • Original filenames
👉 Key Insight:
  • Even “deleted” files can be reconstructed byte-by-byte
7. Forensic Workflow🔹 Step-by-step process
  1. Access $Recycle.Bin
  2. Match $R and $I files
  3. Decode metadata
  4. Reconstruct original file structure
  5. Extract evidence
8. Investigative Value🔹 What can be recovered
  • Deleted documents
  • Malware payloads
  • Sensitive user files
  • Evidence of file wiping attempts
👉 Key Insight:
  • Attackers often forget the Recycle Bin still holds traces
Key Takeaways
  • Recycle Bin does not permanently delete data immediately
  • Legacy systems use INFO2 index files
  • Modern systems use $R and $I file pairs
  • Metadata and file content are separated
  • Hex analysis allows full reconstruction of deleted activity
Big PictureRecycle Bin forensics helps investigators:👉 Move from “deleted file” → “recoverable digital evidence”Mental Model
  • Delete action → Recycle Bin redirect → hidden storage → forensic recovery


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