T1560.002 - Archive Collected Data: Archive via Library

Description from ATT&CK

An adversary may compress or encrypt data that is collected prior to exfiltration using 3rd party libraries. Many libraries exist that can archive data, including [Python](https://attack.mitre.org/techniques/T1059/006) rarfile (Citation: PyPI RAR), libzip (Citation: libzip), and zlib (Citation: Zlib Github). Most libraries include functionality to encrypt and/or compress data. Some archival libraries are preinstalled on systems, such as bzip2 on macOS and Linux, and zip on Windows. Note that the libraries are different from the utilities. The libraries can be linked against when compiling, while the utilities require spawning a subshell, or a similar execution mechanism.

Atomic Tests


Atomic Test #1 - Compressing data using GZip in Python (FreeBSD/Linux)

Uses GZip from Python to compress files

Supported Platforms: Linux

auto_generated_guid: 391f5298-b12d-4636-8482-35d9c17d53a8

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | path_to_input_file | Path to the file that you want to compress | path | /etc/passwd| | path_to_output_file | Path of the file that you want your .gz file to be | path | /tmp/passwd.gz|

Attack Commands: Run with 
1

sh
!

1
2

which_python=`which python || which python3`
$which_python -c "import gzip;input_file=open('#{path_to_input_file}', 'rb');content=input_file.read();input_file.close();output_file=gzip.GzipFile('#{path_to_output_file}','wb',compresslevel=6);output_file.write(content);output_file.close();"

Cleanup Commands:

1

rm #{path_to_output_file}

Dependencies: Run with 
1

sh
!

Description: Requires Python
Check Prereq Commands:
1

which python || which python3
Get Prereq Commands:
1

echo "please install python to run this test"; exit 1



Atomic Test #2 - Compressing data using bz2 in Python (FreeBSD/Linux)

Uses bz2 from Python to compress files

Supported Platforms: Linux

auto_generated_guid: c75612b2-9de0-4d7c-879c-10d7b077072d

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | path_to_input_file | Path to the file that you want to compress | path | /etc/passwd| | path_to_output_file | Path of the file that you want your .bz2 file to be | path | /tmp/passwd.bz2|

Attack Commands: Run with 
1

sh
!

1
2

which_python=`which python || which python3`
$which_python -c "import bz2;input_file=open('#{path_to_input_file}','rb');content=input_file.read();input_file.close();bz2content=bz2.compress(content,compresslevel=9);output_file=open('#{path_to_output_file}','w+');output_file.write(str(bz2content));output_file.close();"

Cleanup Commands:

1

rm #{path_to_output_file}

Dependencies: Run with 
1

sh
!

Description: Requires Python
Check Prereq Commands:
1

which python || which python3
Get Prereq Commands:
1

echo "please install python to run this test"; exit 1



Atomic Test #3 - Compressing data using zipfile in Python (FreeBSD/Linux)

Uses zipfile from Python to compress files

Supported Platforms: Linux

auto_generated_guid: 001a042b-859f-44d9-bf81-fd1c4e2200b0

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | path_to_input_file | Path to the file that you want to compress | path | /etc/passwd| | path_to_output_file | Path of the file that you want your .zip file to be | path | /tmp/passwd.zip|

Attack Commands: Run with 
1

sh
!

1
2

which_python=`which python || which python3`
$which_python -c "from zipfile import ZipFile; ZipFile('#{path_to_output_file}', mode='w').write('#{path_to_input_file}')"

Cleanup Commands:

1

rm #{path_to_output_file}

Dependencies: Run with 
1

sh
!

Description: Requires Python
Check Prereq Commands:
1

which python || which python3
Get Prereq Commands:
1

echo "please install python to run this test"; exit 1



Atomic Test #4 - Compressing data using tarfile in Python (FreeBSD/Linux)

Uses tarfile from Python to compress files

Supported Platforms: Linux

auto_generated_guid: e86f1b4b-fcc1-4a2a-ae10-b49da01458db

Inputs:

| Name | Description | Type | Default Value | |——|————-|——|—————| | path_to_input_file | Path to the file that you want to compress | path | /etc/passwd| | path_to_output_file | Path of the file that you want your .tar.gz file to be | path | /tmp/passwd.tar.gz|

Attack Commands: Run with 
1

sh
!

1
2

which_python=`which python || which python3`
$which_python -c "from zipfile import ZipFile; ZipFile('#{path_to_output_file}', mode='w').write('#{path_to_input_file}')"

Cleanup Commands:

1

rm #{path_to_output_file}

Dependencies: Run with 
1

sh
!

Description: Requires Python
Check Prereq Commands:
1

which python || which python3
Get Prereq Commands:
1

echo "please install python to run this test"; exit 1