Find index entries in $INDEX_ALLOCATION attributes

Related tags

Testing incident-response forensics dfir ntfs digital-forensics digital-forensics-incident-response
Overview

INDXRipper

Find index entries in $INDEX_ALLOCATION attributes

screenshot

Timeline created using mactime.pl on the combined output of INDXRipper and fls.
See: sleuthkit

Motivation

$INDEX_ALLOCATION attributes are used by NTFS directories to store index entries for the files in the directory.

A file's index entry contains the following information:

  • File name
  • File size
  • Allocated size of file (size on disk)
  • A set of MACB timestamps

The slack space of these attributes may contain index entries of deleted files, even after thier MFT record was recycled. Finding these index entries may help you prove a file existed on a system.

How it works

INDXRipper scans the MFT for records of directories that have an $INDEX_ALLOCATION attribute. If it finds such a record, it searches the attribute for file references to this record. Since the index entries in the attribute represent children of the directory, the $FILE_NAME attributes in them must contain this file reference.

This way, It is able to find entries most other tools aren't.
Finding the full paths of directories is done by using the parent directory reference in $FILE_NAME attributes inside the MFT records.

Features and Details

These are pretty standard but here's a list anyways

  • Applies fixups for index records and mft records.
  • Supports $INDEX_ALLOCATION and $FILE_NAME attributes in extension records
  • Supports unicode filenames
  • Index entries from orphan directories are listed under "/$Orphan"
  • Provides bodyfile output for supertimeline creation
  • Works on live windows systems using the "\\.\" notation
  • All times outputted are UTC times

Installation

Python 3.8 or above is required.
Use the package manager pip to install construct.

pip install construct==2.10.56

Alternatively, you can use the Windows standalone executable.

Usage

# process dead disk image, get all index entries
python INDXRipper.py ntfs.part.001 output.csv

# process live system, slack space only, bodyfile output, append "C:" to all the paths
python INDXRipper.py -m C: --slack-only --bodyfile \\.\C: output.bodyfile

Limitations

Entries that are partially overitten may not be found. If they are found, though, the tool may give you false information

What this tool doesn't do

  • This tool doesn't process $INDEX_ROOT attributes. You won't see an output for every file on the volume
  • This tool doesn't carve $INDEX_ALLOCATION attributes. It won't find attributes that thier MFT entry was recycled.

License

MIT

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Comments
  • Issue running on SIFT: ModuleNotFoundError: No module named 'construct'

    Issue running on SIFT: ModuleNotFoundError: No module named 'construct'

    When running INDXParser.py against both a single E01 and a series of split E01 files, I am presented with the following error:

    INDXRipper: error: invalid volume boot record

    All of the following command produce the same error Single E01:

    python3.9 ../tools/INDXRipper/INDXRipper.py /mnt/hgfs/testing/Disk1.E01 outfile

    Split E01, with offset (2048)

    python3.9 ../tools/INDXRipper/INDXRipper.py -o 2048 /mnt/hgfs/testing/Disk2-Collection/Disk2.E01 outfile

    Split E01, with calculated offset (2048x512)

    python3.9 ../tools/INDXRipper/INDXRipper.py -o 1048576 /mnt/hgfs/testing/Disk2-Collection/Disk2.E01 outfile
    help wanted 
    opened by ezaspy 8
  • construct.core.StreamError: Error in path (parsing)

    construct.core.StreamError: Error in path (parsing)

    I have followed the updated instructions for setting up a venv and have ran into the following error:

    $ sudo venv/bin/python tools/INDXRipper/INDXRipper.py -w csv -o 576716800 /mnt/i30_disk1.E01/ewf1 outfile
Traceback (most recent call last):
  File "/opt/elrond/elrond/tools/INDXRipper/INDXRipper.py", line 309, in <module>
    main()
  File "/opt/elrond/elrond/tools/INDXRipper/INDXRipper.py", line 300, in main
    vbr = get_boot_sector(raw_image, args.o * args.b)
  File "/opt/elrond/elrond/tools/INDXRipper/ntfs.py", line 160, in get_boot_sector
    return BOOT_SECTOR.parse_stream(raw_image)
  File "/opt/elrond/elrond/venv/lib/python3.9/site-packages/construct/core.py", line 300, in parse_stream
    return self._parsereport(stream, context, "(parsing)")
  File "/opt/elrond/elrond/venv/lib/python3.9/site-packages/construct/core.py", line 312, in _parsereport
    obj = self._parse(stream, context, path)
  File "/opt/elrond/elrond/venv/lib/python3.9/site-packages/construct/core.py", line 2120, in _parse
    subobj = sc._parsereport(stream, context, path)
  File "/opt/elrond/elrond/venv/lib/python3.9/site-packages/construct/core.py", line 312, in _parsereport
    obj = self._parse(stream, context, path)
  File "/opt/elrond/elrond/venv/lib/python3.9/site-packages/construct/core.py", line 4101, in _parse
    stream_read(stream, pad, path)
  File "/opt/elrond/elrond/venv/lib/python3.9/site-packages/construct/core.py", line 91, in stream_read
    raise StreamError("stream read less than specified amount, expected %d, found %d" % (length, len(data)), path=path)
construct.core.StreamError: Error in path (parsing)
stream read less than specified amount, expected 3, found 0

    I have two offsets for the disk:

    • 2048 (x512) = 1048576
    • 1126400 (x512) = 576716800

    And I can't not run it as sudo, as the mount point permissions for /mnt/i30_disk1/ewf1 cannot be altered:

    chmod: changing permissions of '/mnt/i30_disk1.E01': Function not implemented
chmod: changing permissions of '/mnt/i30_disk1.E01/ewf1': Function not implemented
    opened by ezaspy 2
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