Skip to content

Latest commit

 

History

History
456 lines (244 loc) · 12.8 KB

T1222.md

File metadata and controls

456 lines (244 loc) · 12.8 KB
Raw

T1222 - File and Directory Permissions Modification

Description from ATT&CK

File and directory permissions are commonly managed by discretionary access control lists (DACLs) specified by the file or directory owner. File and directory DACL implementations may vary by platform, but generally explicitly designate which users/groups can perform which actions (ex: read, write, execute, etc.). (Citation: Microsoft DACL May 2018) (Citation: Microsoft File Rights May 2018) (Citation: Unix File Permissions)

Adversaries may modify file or directory permissions/attributes to evade intended DACLs. (Citation: Hybrid Analysis Icacls1 June 2018) (Citation: Hybrid Analysis Icacls2 May 2018) Modifications may include changing specific access rights, which may require taking ownership of a file or directory and/or elevated permissions such as Administrator/root depending on the file or directory's existing permissions to enable malicious activity such as modifying, replacing, or deleting specific files/directories. Specific file and directory modifications may be a required step for many techniques, such as establishing Persistence via Accessibility Features, Logon Scripts, or tainting/hijacking other instrumental binary/configuration files.

Atomic Tests


Atomic Test #1 - Take ownership using takeown utility

Modifies the filesystem permissions of the specified file or folder to take ownership of the object.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
file_folder_to_own Path of the file or folder for takeown to take ownership. path PathToAtomicsFolder\T1222\T1222.yaml

Attack Commands: Run with command_prompt!

takeown.exe /f #{file_folder_to_own}


Atomic Test #2 - Take ownership recursively using takeown utility

Modifies the filesystem permissions of the specified folder to take ownership of it and its contents.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
folder_to_own Path of the folder for takeown to take ownership. path PathToAtomicsFolder\T1222

Attack Commands: Run with command_prompt!

takeown.exe /f #{folder_to_own} /r


Atomic Test #3 - cacls - Grant permission to specified user or group

Modifies the filesystem permissions of the specified file or folder to allow the specified user or group Full Control.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder to change permissions. path PathToAtomicsFolder\T1222\T1222.yaml
user_or_group User or group to allow full control string Everyone

Attack Commands: Run with command_prompt!

cacls.exe #{file_or_folder} /grant #{user_or_group}:F


Atomic Test #4 - cacls - Grant permission to specified user or group recursively

Modifies the filesystem permissions of the specified folder and contents to allow the specified user or group Full Control.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder to change permissions. path PathToAtomicsFolder\T1222
user_or_group User or group to allow full control string Everyone

Attack Commands: Run with command_prompt!

cacls.exe #{file_or_folder} /grant #{user_or_group}:F /t


Atomic Test #5 - icacls - Grant permission to specified user or group

Modifies the filesystem permissions of the specified file or folder to allow the specified user or group Full Control.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder to change permissions. path PathToAtomicsFolder\T1222\T1222.yaml
user_or_group User or group to allow full control string Everyone

Attack Commands: Run with command_prompt!

icacls.exe #{file_or_folder} /grant #{user_or_group}:F


Atomic Test #6 - icacls - Grant permission to specified user or group recursively

Modifies the filesystem permissions of the specified folder and contents to allow the specified user or group Full Control.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder to change permissions. path PathToAtomicsFolder\T1222
user_or_group User or group to allow full control string Everyone

Attack Commands: Run with command_prompt!

icacls.exe #{file_or_folder} /grant #{user_or_group}:F /t


Atomic Test #7 - attrib - Remove read-only attribute

Removes the read-only attribute from a file or folder using the attrib.exe command.

Supported Platforms: Windows

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder remove attribute. path PathToAtomicsFolder\T1222

Attack Commands: Run with command_prompt!

attrib.exe -r #{file_or_folder}


Atomic Test #8 - chmod - Change file or folder mode (numeric mode)

Changes a file or folder's permissions using chmod and a specified numeric mode.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222
numeric_mode Specified numeric mode value string 755

Attack Commands: Run with bash!

chmod #{numeric_mode} #{file_or_folder}


Atomic Test #9 - chmod - Change file or folder mode (symbolic mode)

Changes a file or folder's permissions using chmod and a specified symbolic mode.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222
symbolic_mode Specified symbolic mode value string a+w

Attack Commands: Run with bash!

chmod #{symbolic_mode} #{file_or_folder}


Atomic Test #10 - chmod - Change file or folder mode (numeric mode) recursively

Changes a file or folder's permissions recursively using chmod and a specified numeric mode.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222
numeric_mode Specified numeric mode value string 755

Attack Commands: Run with bash!

chmod #{numeric_mode} #{file_or_folder} -R


Atomic Test #11 - chmod - Change file or folder mode (symbolic mode) recursively

Changes a file or folder's permissions recursively using chmod and a specified symbolic mode.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222
symbolic_mode Specified symbolic mode value string a+w

Attack Commands: Run with bash!

chmod #{symbolic_mode} #{file_or_folder} -R


Atomic Test #12 - chown - Change file or folder ownership and group

Changes a file or folder's ownership and group information using chown.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222/T1222.yaml
owner Username of desired owner string root
group Group name of desired group string root

Attack Commands: Run with bash!

chown #{owner}:#{group} #{file_or_folder}


Atomic Test #13 - chown - Change file or folder ownership and group recursively

Changes a file or folder's ownership and group information recursively using chown.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222
owner Username of desired owner string root
group Group name of desired group string root

Attack Commands: Run with bash!

chown #{owner}:#{group} #{file_or_folder} -R


Atomic Test #14 - chown - Change file or folder mode ownership only

Changes a file or folder's ownership only using chown.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222/T1222.yaml
owner Username of desired owner string root

Attack Commands: Run with bash!

chown #{owner} #{file_or_folder}


Atomic Test #15 - chown - Change file or folder ownership recursively

Changes a file or folder's ownership only recursively using chown.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_or_folder Path of the file or folder path /tmp/AtomicRedTeam/atomics/T1222
owner Username of desired owner string root

Attack Commands: Run with bash!

chown #{owner} #{file_or_folder} -R


Atomic Test #16 - chattr - Remove immutable file attribute

Remove's a file's immutable attribute using chattr. This technique was used by the threat actor Rocke during the compromise of Linux web servers.

Supported Platforms: macOS, Linux

Inputs:

Name Description Type Default Value
file_to_modify Path of the file path /var/spool/cron/root

Attack Commands: Run with sh!

chattr -i #{file_to_modify}