TA0005 · DEFENSE EVASION
Linux and Mac File and Directory Permissions Modification
Adversaries may modify file or directory permissions/attributes to evade access control lists (ACLs) and access protected files.
Detect it with
Monitor and investigate attempts to modify ACLs and file/directory ownership.
Why it matters on shift
Linux and Mac File and Directory Permissions Modification is one of the concrete ways adversaries achieve defense evasion. Recognising it in telemetry lets you name the technique in your ticket and pivot to what came before and after.
What to look for next
After defense evasion, the next tactic is usually Credential Access. Search your telemetry for the transition before closing the ticket.
Kill-chain context