hashlookup-forensic-analyser

lint_python

Analyse a forensic target (such as a directory) to find and report files found and not found from CIRCL hashlookup public service or the Bloom filter from CIRCL hashlookup. This tool can help a digital forensic investigator to know the context, origin of specific files during a digital forensic investigation.

The project is a component of the hashlookup.io project.

Usage

usage: hashlookup-analyser.py [-h] [-v] [--extended-debug] [--progress] [--disable-progress] [-d DIR] [--report] [--live-linux] [--print-all] [--print-unknown] [--include-stats] [--format FORMAT] [--cache]
                              [--bloomfilters BLOOMFILTERS [BLOOMFILTERS ...]] [--bloomfilter-algorithm BLOOMFILTER_ALGORITHM] [--bloomfilters-lower-case]

Analyse a forensic target to find and report files found and not found in hashlookup CIRCL public service.

optional arguments:
  -h, --help            show this help message and exit
  -v, --verbose         Verbose output.
  --extended-debug      Debug file processed along with the mode and type.
  --progress            Print progress of the file lookup on stderr.
  --disable-progress    Disable printing progress of the file lookup on stderr.
  -d DIR, --dir DIR     Directory to analyse.
  --report              Generate a report directory including a summary and all the results.
  --live-linux          View known and unknown files from the live processes (using /proc)
  --print-all           Print all files result including known and unknown.
  --print-unknown       Print all files unknown to hashlookup service.
  --include-stats       Include statistics in the CSV export.
  --format FORMAT       Output format (default is CSV).
  --cache               Enable local cache of known and unknown hashes in /tmp/hashlookup-forensic-analyser.
  --bloomfilters BLOOMFILTERS [BLOOMFILTERS ...]
                        Space separated list of filenames of bloomfilters in DCSO bloomfilter format. Hashlookup default format is used which SHA-1 in hexadecimal representation in upper case.
  --bloomfilter-algorithm BLOOMFILTER_ALGORITHM
                        Specify hash algorithm which was used in filter set/bloomfilter. Default is SHA1.
  --bloomfilters-lower-case
                        If entries in the Bloom filter are expeceted to be lower case. Default is False.

Sample report

If you want to analyse a specific directory (in this case, a Kernel module directory), the following command be executed:

python3 hashlookup-analyser.py --bloomfilters ../hashlookup/hashlookup-full.bloom.1 --report -d /usr/lib/modules/5.11.0-41-generic/

When executed with --report, a summary report in Markdown and a full JSON file report are generated.

A sample summary report is available.

Sample output

python3 hashlookup-analyser.py --print-all -d /usr/local/bin/ --include-stats --cache
hashlookup_result,filename,sha-1,size
known,/usr/local/bin/scss,171B3B77F16894C33ADAC884F162A531FB3A3F62,517
known,/usr/local/bin/sass-convert,555BCFEF91F023E634594C5CC46A41B2A0173742,533
known,/usr/local/bin/listen,758A6526DF120C118FB4309B9AC6AB5DAE21FE6F,529
known,/usr/local/bin/nokogiri,C516EF9E51867E1615DA3FDABDAC55B99E16B6A3,541
known,/usr/local/bin/dumppdf.py,9D4596DE611EF8840383DF4E7682378498B13329,12851
known,/usr/local/bin/sass,C92705012D7CE8BC7BEBFA13D7154720B7D19A08,517
unknown,/usr/local/bin/octopress,F3939C055B533201ED2C65CD5E113A3644CF52FC,547
unknown,/usr/local/bin/pyrsa-verify,0ECC95CACCFE73F100B62306B0EC73214B07A4EF,210
unknown,/usr/local/bin/safe_yaml,4376A50A4C705F6AAB9D7B6A10D292C40AE58CC3,547
unknown,/usr/local/bin/gemoji,672785F37185A4154C9159C1A151A7440007FD2A,529
unknown,/usr/local/bin/bayes.rb,DEF8945D48E0557C2EDA5F506BDDA52CB6F870F2,577
unknown,/usr/local/bin/redcarpet,40E0C2E0D33FF42A6A69DA76BAD24EF5FBC3EF5B,547
unknown,/usr/local/bin/shodan,848E102C87A084C1401BB3FE85BF07E2A6EA984A,214
unknown,/usr/local/bin/pyrsa-priv2pub,3C37A0507F51A35EA5969559C051132B94012CEE,233
unknown,/usr/local/bin/jwt,733BE10A7BFCB3CEE5F593C680542ACFB050C902,211
unknown,/usr/local/bin/github-pages,2FA4D8E77E4D92B11C488EBD3BF46E3C9CF28727,565
unknown,/usr/local/bin/f2py,4DD0FD5C23DAB47B2B9F0BC602EA0E7380E0E1AB,216
unknown,/usr/local/bin/f2py3.8,4DD0FD5C23DAB47B2B9F0BC602EA0E7380E0E1AB,216
unknown,/usr/local/bin/tabulate,676B359E35C10404C7D96D3FEC51E1168ED2F5F3,209
unknown,/usr/local/bin/vba_extract.py,5B8C38C90140D15EA0D57DE5FD0BC6C9DF297E78,1813
unknown,/usr/local/bin/jekyll,6569B0B04E681E2FDCE84516336CAB10117F9D1D,529
unknown,/usr/local/bin/pdf2txt.py,C1D9785041216CBC3831D6A5F826B080EC481F32,8338
unknown,/usr/local/bin/rougify,D5F5C89269E1A7F84A983141C5C22AD50CE14F45,527
unknown,/usr/local/bin/summarize.rb,F0E1C3E5DAB10190C1B1E9D6E4665DD33A8FA4C9,585
unknown,/usr/local/bin/camelot,10CC9D468BE06F880F9065D7A34968701D6F2121,208
unknown,/usr/local/bin/kramdown,7DC8F2F6BD1D685817F2795EEC3AAABB2FBE4803,541
unknown,/usr/local/bin/pyrsa-encrypt,956BA954D79A29F1878375639E8F4D392F63B66C,212
unknown,/usr/local/bin/flask,4BCCBDCC6797E5B48D84207B2E71F74F545443E9,208
unknown,/usr/local/bin/jirashell,A7867C26CCD9EE5ABD1E6ED47A84F0A54A88480F,213
unknown,/usr/local/bin/posix-spawn-benchmark,4393D19B57AF71972AAB9D64159C249290806CF7,579
unknown,/usr/local/bin/pyrsa-sign,145A250476DA9D78ADA74E2F5975C3CC34BD3E10,206
unknown,/usr/local/bin/f2py3,4DD0FD5C23DAB47B2B9F0BC602EA0E7380E0E1AB,216
unknown,/usr/local/bin/pyrsa-keygen,4FEC09E57C767CEBEBC9D1F74FC9FC6B056DA0B2,210
unknown,/usr/local/bin/wsdump.py,01D4947AE9CE873A08EC94A910F7928441685B5E,6902
unknown,/usr/local/bin/emailrep,A73D10ED93DA2AA0A5A2A5282CE1BE14A8F6D769,211
unknown,/usr/local/bin/pyrsa-decrypt,57CB2C91C75701E67D734794363BA523E3DCD952,212
unknown,/usr/local/bin/__pycache__/dumppdf.cpython-38.pyc,7F7332186257CB043570296A13F30E43749C79A8,10562
unknown,/usr/local/bin/__pycache__/vba_extract.cpython-38.pyc,BABF747254BED4881368C1148265538F5FE0C756,1202
unknown,/usr/local/bin/__pycache__/pdf2txt.cpython-38.pyc,0C22717A2D2C6676005B99EB6CFF03BF73DAD5A1,6684
unknown,/usr/local/bin/__pycache__/wsdump.cpython-38.pyc,ADD28D31B88E5995A0725A424B415C350726CFD5,6449
stats,Analysed directory /usr/local/bin/ on kolmogorov running Linux-5.10.0-1045-oem-x86_64-with-glibc2.29 at 2021-10-17 15:50:07.299694+00:00- Found 6 on hashlookup.circl.lu - Unknown files 34 - Excluded files 0

Bloom filter

If you don’t want to share your lookups online and do faster lookup, hashlookup provides a bloom filter to download.

The file is around 1GB and can be stored locally in your home directory. hashlookup-analyser works in the same way, --bloomfilters option allows to specify the filename location of the bloom filter (one or more).

python3 bin/hashlookup-analyser.py --bloomfilters /home/adulau/hashlookup/hashlookup-full.bloom --include-stats -d /bin

License

The software is an open source software released under the “Simplified BSD License”.

Copyright 2021-2023 Alexandre Dulaunoy
Copyright 2021-2023 All Contributors

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.