3 minute read

Introduction

This post aims to replicate my physical playbook on Disk Images and includes the following tools

- The SleuthKit(TSK)
- Ripl.pl
- find (Hash unallocated files without extracting... find that malware)

Contents

Overview

Broadly, the following overview, will show the basic fls / mmls commands. For each of the red circles, that is where we’re getting the inode or offset from

Command Description Comments Use
mmls <filename> Show’s partitions and disk offsets Usually the largest partition that starts at approximately 63 for BIOS versions of windows, and the second partition after 2048 for EFI versions of windows mmls
fls -o <offset> <filename> Using the offsets identified on mmls will show the contents off the root directory (ls -lah equivalent) - flso
fls -o <Offset> <filename> -D shows only directories the directories avialable. - flsd
fls -o <offset> <filename> <inode> lists the contents of a given directory. - - flsi
fls -o <offset> <filename> <inode> -r lists the contents of a given directory and all its sub directories - flsr
fls -l -z <TimeZoneofMachine> -o <offset> <filename> <inode> lists the times on files Format: file_type inode file_name mod_time acc_time chg_time cre_time size uid gid -
icat -o <offset> <filename> <inode> cat’s out the file to STDOUT, can be redirected to make a copy of the file by adding > file.txt. - icat
tsk_recover -o <offset> <filename> -e -d <Directory inode> Extracts an entire directories files, including those that are unallocated, useful for deleted files - tsk

Back to table of contents)

Using TSK to make a timeline

You can tsk for more than just extracting files. Its one of the best, and most lightweight tools to make a quick MFTTimeline, or, Filesystem timeline. And, whats better, is there is no mounting, period, thank the DFIR Gods. This makes this one of the best and quickest triage tools to use.

Back to table of contents)

Triage Timeline

Command Description
fls -o <offset> <filename> -r -p -m <PartitionLetter>:/ > <outputfile> Generates a tsk triage timeline bodyfile from offset. Note, you can use / for a linux partition instead of <PartitionLetter>:/
fls -r -p -m <PartitionLetter>:/ -d /dev/<sdx> > <outputfile> Generates a tsk triage timeline bodyfile note from a diskmount, you can use / for a linux partition instead of <PartitionLetter>:/
mactime -b <bodyfile> -d -y -z <Timezone> <StartTime> <EndTime> > <outputfile>.csv Creates a csv timeline from the body file. Tzformat = Australia/Sydney TimeFormat = 2000-04-20T00:00:00 NOTE: -z with <timezone> <StartTime> or <EndTime> are optional note if you are unsure of the timezones OR times dont convert correctly , you can list them with mactime -z list if you get an error that states time module not loaded, you will need to install sudo apt-get install libdatetime-perl
grep -v -i -f timeline_noise.txt <outputfile>.csv > <outfile-final>.csv Reduces timeline noise

Back to table of contents)

timeline_noise.txt

Content.IE5
Temporary\ Internet\ Files
IETldCache
PrivacIE
ACPI
MSIE\ Cache\ File
\(\$FILE\_NAME\)
THREAD
DLL\ LOADTIME

Back to table of contents)

MFT Timeline

Command Description
icat -o <offset> <filename> 0 > <directory>/mft.raw Extracts mft from disk for enhanced timeline
analyzeMFT.py -f <directory>/mft.raw -e -o mfttl.csv Generates a MFT CSV Timeline

Back to table of contents)

Quick Registry analysis

  • rip.pl -r NTUSER.DAT -p userassist From the files extracted with tsk_recover, you can quickly get the userassist keys. If you want to see other types you can use –help

Back to table of contents)

Hash all files, including unallocated with find on a live linux system

-find . -type f -exec md5sum "{}" \;

Get the physical location of a file on disk

-filefrag -v <filename>

Back to table of contents)