atomic-red-team/atomics/T1002/T1002.md

T1002 - Data Compressed

Description from ATT&CK

An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration in order to make it portable and minimize the amount of data sent over the network. The compression is done separately from the exfiltration channel and is performed using a custom program or algorithm, or a more common compression library or utility such as 7zip, RAR, ZIP, or zlib.

Atomic Tests

• Atomic Test #1 - Compress Data for Exfiltration With PowerShell

• Atomic Test #2 - Compress Data for Exfiltration With Rar

• Atomic Test #3 - Data Compressed - nix - zip

• Atomic Test #4 - Data Compressed - nix - gzip Single File

• Atomic Test #5 - Data Compressed - nix - tar Folder or File

Atomic Test #1 - Compress Data for Exfiltration With PowerShell

An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration

Supported Platforms: Windows

Inputs

Name	Description	Type	Default Value
input_file	Path that should be compressed into our output file	Path	C:*
output_file	Path where resulting compressed data should be placed	Path	C:\test\Data.zip

Run it with powershell!

dir #{input_file} -Recurse | Compress-Archive -DestinationPath #{output_file}

Atomic Test #2 - Compress Data for Exfiltration With Rar

An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration

Supported Platforms: Windows

Inputs

Name	Description	Type	Default Value
input_file	Path that should be compressed into our output file	Path	*.docx
output_file	Path where resulting compressed data should be placed	Path	exfilthis.rar

Run it with command_prompt!

rar a -r #{output_file} #{input_file}

Atomic Test #3 - Data Compressed - nix - zip

An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration. This test uses standard zip compression.

Supported Platforms: Linux, macOS

Inputs

Name	Description	Type	Default Value
input_files	Path that should be compressed into our output file, may include wildcards	Path	/tmp/victim-files/*
output_file	Path that should be output as a zip archive	Path	/tmp/victim-files.zip

Run it with sh!

zip #{output_file} #{input_files}

Atomic Test #4 - Data Compressed - nix - gzip Single File

An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration. This test uses standard gzip compression.

Supported Platforms: Linux, macOS

Inputs

Name	Description	Type	Default Value
input_file	Path that should be compressed	Path	/tmp/victim-gzip.txt

Run it with sh!

gzip -f #{input_file}

Atomic Test #5 - Data Compressed - nix - tar Folder or File

An adversary may compress data (e.g., sensitive documents) that is collected prior to exfiltration. This test uses standard gzip compression.

Supported Platforms: Linux, macOS

Inputs

Name	Description	Type	Default Value
input_file_folder	Path that should be compressed	Path	/tmp/victim-files/
output_file	File that should be output	Path	/tmp/victim-files.tar.gz

Run it with sh!

tar -cvzf #{output_file} #{input_file_folder}