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Attack: Account Manipulation

Adversaries may manipulate accounts to maintain and/or elevate access to victim systems. Account manipulation may consist of any action that preserves or modifies adversary access to a compromised account, such as modifying credentials or permission groups.(Citation: FireEye SMOKEDHAM June 2021) These actions could also include account activity designed to subvert security policies, such as performing iterative password updates to bypass password duration policies and preserve the life of compromised credentials.

In order to create or manipulate accounts, the adversary must already have sufficient permissions on systems or the domain. However, account manipulation may also lead to privilege escalation where modifications grant access to additional roles, permissions, or higher-privileged Valid Accounts.

MITRE

Tactic

technique

Test : Domain Account and Group Manipulate

OS

Description:

Create a random atr-nnnnnnnn account and add it to a domain group (by default, Domain Admins).

The quickest way to run it is against a domain controller, using -Session of Invoke-AtomicTest. Alternatively, you need to install PS Module ActiveDirectory (in prereqs) and run the script with appropriare AD privileges to create the user and alter the group. Automatic installation of the dependency requires an elevated session, and is unlikely to work with Powershell Core (untested).

If you consider running this test against a production Active Directory, the good practise is to create a dedicated service account whose delegation is given onto a dedicated OU for user creation and deletion, as well as delegated as group manager of the target group.

Example: Invoke-AtomicTest -Session $session 'T1098' -TestNames "Domain Account and Group Manipulate" -InputArgs @{"group" = "DNSAdmins" }

Executor

powershell

Sigma Rule

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