Added TTP TA0007 Discovery: T1087.001 Local Account

[sw8y]

Proposed Changes

Added MITRE ATT&CK TTP for Account Discovery.

Tactic: TA0007 Discovery
Techniques: T1087 Account Discovery
Subtechniques: T1087.001 Local Account
This TTP leverages the Directory Service Command Line (DSCL) utility to pull a list of local user accounts on MacOS.

Related Issue(s)
No issues to report from this change. Simply adding another TTP to this repository.

Testing
Identified the command and syntax needed to pull local user accounts from MacOS.
Ran the command locally to confirm that user accounts are being printed as expected.
Added the "list_local_users" folder within the "macOS" parent folder.
Added the "list_local_users.yaml" file under the "list_local_users" folder.
Added the command to print user account names: "dscl . list /Users | grep -v “^_”"
Ran the YAML file locally and confirmed that user accounts are being printed and no issues arise.

Documentation
No documentation updates have been made.

Screenshots/GIFs (optional)

Not applicable.

Checklist

• Ran mage runprecommit locally and fixed any issues that arose.
• Curated your commit(s) so they are legible and easy to read and understand.
• 🚀

[l50]

Looks good to me, thank you so much for the new TTP and the correction to the previous one!