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68 lines
1.9 KiB
Markdown
68 lines
1.9 KiB
Markdown
# API Reference: Hunting for Timestomping (T1070.006)
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## NTFS Timestamp Attributes
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| Attribute | Modifiable By | Updated On |
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|-----------|--------------|------------|
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| $STANDARD_INFORMATION | User-level APIs (SetFileTime) | Create, modify, access, MFT change |
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| $FILE_NAME | Windows kernel only | File create, rename, move |
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## Detection Logic
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| Indicator | Description |
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|-----------|------------|
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| SI < FN Created | $SI creation before $FN creation (most reliable) |
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| Zero nanoseconds | .0000000 in timestamp (tool artifacts) |
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| Future timestamp | Date beyond current time |
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| Pre-OS timestamp | $SI before OS install but $FN after |
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| Round seconds | No fractional seconds (unusual for NTFS) |
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## analyzeMFT (Python)
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```bash
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pip install analyzemft
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# Parse MFT to CSV
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analyzeMFT.py -f /path/to/$MFT -o mft_output.csv
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# With body file output (for timeline)
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analyzeMFT.py -f $MFT -o mft.csv -b body.txt
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```
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## MFTECmd (Eric Zimmerman)
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```bash
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# Parse MFT to CSV
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MFTECmd.exe -f C:\evidence\$MFT --csv C:\output\
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# With $J (USN Journal)
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MFTECmd.exe -f $MFT --csv output\ --json output\
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```
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### CSV Columns
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| Column | Description |
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|--------|------------|
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| Record Number | MFT entry number |
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| Filename | File name |
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| SI Created/Modified/Accessed | $STANDARD_INFORMATION timestamps |
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| FN Created/Modified/Accessed | $FILE_NAME timestamps |
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| In Use | Active record flag |
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## USN Journal Analysis
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```bash
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# Parse USN Journal for corroboration
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MFTECmd.exe -f $J --csv output\
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# fsutil on live system
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fsutil usn readjournal C: csv > usn_journal.csv
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```
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## Timestomping Tools (for detection awareness)
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| Tool | Method |
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|------|--------|
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| timestomp (Metasploit) | SetFileTime API |
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| PowerShell Set-ItemProperty | .NET DateTime |
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| NirSoft BulkFileChanger | Batch timestamp edit |
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| $STANDARD_INFORMATION patch | Direct MFT edit |
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## MITRE ATT&CK
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- **T1070.006** - Indicator Removal: Timestomp
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- **Tactic**: Defense Evasion
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- **Platforms**: Windows
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