atomic-red-team/atomics/T1201/T1201.md

T1201 - Password Policy Discovery

Description from ATT&CK

Adversaries may attempt to access detailed information about the password policy used within an enterprise network. Password policies for networks are a way to enforce complex passwords that are difficult to guess or crack through [Brute Force](https://attack.mitre.org/techniques/T1110). This would help the adversary to create a list of common passwords and launch dictionary and/or brute force attacks which adheres to the policy (e.g. if the minimum password length should be 8, then not trying passwords such as 'pass123'; not checking for more than 3-4 passwords per account if the lockout is set to 6 as to not lock out accounts).

Password policies can be set and discovered on Windows, Linux, and macOS systems via various command shell utilities such as net accounts (/domain), Get-ADDefaultDomainPasswordPolicy, chage -l , cat /etc/pam.d/common-password, and pwpolicy getaccountpolicies.(Citation: Superuser Linux Password Policies) (Citation: Jamf User Password Policies)

Atomic Tests

• Atomic Test #1 - Examine password complexity policy - Ubuntu

• Atomic Test #2 - Examine password complexity policy - CentOS/RHEL 7.x

• Atomic Test #3 - Examine password complexity policy - CentOS/RHEL 6.x

• Atomic Test #4 - Examine password expiration policy - All Linux

• Atomic Test #5 - Examine local password policy - Windows

• Atomic Test #6 - Examine domain password policy - Windows

• Atomic Test #7 - Examine password policy - macOS

Atomic Test #1 - Examine password complexity policy - Ubuntu

Lists the password complexity policy to console on Ubuntu Linux.

Supported Platforms: Linux

auto_generated_guid: 085fe567-ac84-47c7-ac4c-2688ce28265b

Attack Commands: Run with bash!

cat /etc/pam.d/common-password

Atomic Test #2 - Examine password complexity policy - CentOS/RHEL 7.x

Lists the password complexity policy to console on CentOS/RHEL 7.x Linux.

Supported Platforms: Linux

auto_generated_guid: 78a12e65-efff-4617-bc01-88f17d71315d

Attack Commands: Run with bash!

cat /etc/security/pwquality.conf

Dependencies: Run with bash!

Description: System must be CentOS or RHEL v7

Check Prereq Commands:

if [ $(rpm -q --queryformat '%{VERSION}') -eq "7" ]; then exit /b 0; else exit /b 1; fi;

Get Prereq Commands:

echo Please run from CentOS or RHEL v7

Atomic Test #3 - Examine password complexity policy - CentOS/RHEL 6.x

Lists the password complexity policy to console on CentOS/RHEL 6.x Linux.

Supported Platforms: Linux

auto_generated_guid: 6ce12552-0adb-4f56-89ff-95ce268f6358

Attack Commands: Run with bash!

cat /etc/pam.d/system-auth
cat /etc/security/pwquality.conf

Dependencies: Run with bash!

Description: System must be CentOS or RHEL v6

Check Prereq Commands:

if [ $(rpm -q --queryformat '%{VERSION}') -eq "6" ]; then exit /b 0; else exit /b 1; fi;

Get Prereq Commands:

echo Please run from CentOS or RHEL v6

Atomic Test #4 - Examine password expiration policy - All Linux

Lists the password expiration policy to console on CentOS/RHEL/Ubuntu.

Supported Platforms: Linux

auto_generated_guid: 7c86c55c-70fa-4a05-83c9-3aa19b145d1a

Attack Commands: Run with bash!

cat /etc/login.defs

Atomic Test #5 - Examine local password policy - Windows

Lists the local password policy to console on Windows.

Supported Platforms: Windows

auto_generated_guid: 4588d243-f24e-4549-b2e3-e627acc089f6

Attack Commands: Run with command_prompt!

net accounts

Atomic Test #6 - Examine domain password policy - Windows

Lists the domain password policy to console on Windows.

Supported Platforms: Windows

auto_generated_guid: 46c2c362-2679-4ef5-aec9-0e958e135be4

Attack Commands: Run with command_prompt!

net accounts /domain

Atomic Test #7 - Examine password policy - macOS

Lists the password policy to console on macOS.

Supported Platforms: macOS

auto_generated_guid: 4b7fa042-9482-45e1-b348-4b756b2a0742

Attack Commands: Run with bash!

pwpolicy getaccountpolicies