T1083.md

T1083 - File and Directory Discovery

Description from ATT&CK

Adversaries may enumerate files and directories or may search in specific locations of a host or network share for certain information within a file system. Adversaries may use the information from [File and Directory Discovery](https://attack.mitre.org/techniques/T1083) during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions.

Many command shell utilities can be used to obtain this information. Examples include dir, tree, ls, find, and locate. (Citation: Windows Commands JPCERT) Custom tools may also be used to gather file and directory information and interact with the Native API.

Atomic Tests

• Atomic Test #1 - File and Directory Discovery (cmd.exe)

• Atomic Test #2 - File and Directory Discovery (PowerShell)

• Atomic Test #3 - Nix File and Diectory Discovery

• Atomic Test #4 - Nix File and Directory Discovery 2

Atomic Test #1 - File and Directory Discovery (cmd.exe)

Find or discover files on the file system. Upon execution, the file "download" will be placed in the temporary folder and contain the output of all of the data discovery commands.

Supported Platforms: Windows

Attack Commands: Run with command_prompt!

dir /s c:\ >> %temp%\download
dir /s "c:\Documents and Settings" >> %temp%\download
dir /s "c:\Program Files\" >> %temp%\download
dir "%systemdrive%\Users\*.*" >> %temp%\download
dir "%userprofile%\AppData\Roaming\Microsoft\Windows\Recent\*.*" >> %temp%\download
dir "%userprofile%\Desktop\*.*" >> %temp%\download
tree /F >> %temp%\download

Atomic Test #2 - File and Directory Discovery (PowerShell)

Find or discover files on the file system. Upon execution, file and folder information will be displayed.

Supported Platforms: Windows

Attack Commands: Run with powershell!

ls -recurse
get-childitem -recurse
gci -recurse

Atomic Test #3 - Nix File and Diectory Discovery

Find or discover files on the file system

References:

http://osxdaily.com/2013/01/29/list-all-files-subdirectory-contents-recursively/

https://perishablepress.com/list-files-folders-recursively-terminal/

Supported Platforms: macOS, Linux

Inputs:

Name	Description	Type	Default Value
output_file	Output file used to store the results.	path	/tmp/T1083.txt

Attack Commands: Run with sh!

ls -a >> #{output_file}
if [ -d /Library/Preferences/ ]; then ls -la /Library/Preferences/ > #{output_file}; fi;
file */* *>> #{output_file}
cat #{output_file} 2>/dev/null
find . -type f
ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/ /' -e 's/-/|/'
locate *
which sh

Cleanup Commands:

rm #{output_file}

Atomic Test #4 - Nix File and Directory Discovery 2

Find or discover files on the file system

Supported Platforms: macOS, Linux

Inputs:

Name	Description	Type	Default Value
output_file	Output file used to store the results.	path	/tmp/T1083.txt

Attack Commands: Run with sh!

cd $HOME && find . -print | sed -e 's;[^/]*/;|__;g;s;__|; |;g' > #{output_file}
if [ -f /etc/mtab ]; then cat /etc/mtab >> #{output_file}; fi;
find . -type f -iname *.pdf >> #{output_file}
cat #{output_file}
find . -type f -name ".*"

Cleanup Commands:

rm #{output_file}