TA0006 · CREDENTIAL ACCESS
ARP Cache Poisoning
Adversaries may poison Address Resolution Protocol (ARP) caches to position themselves between the communication of two or more networked devices.
Detect it with
Monitor network traffic for unusual ARP traffic, gratuitous ARP replies may be suspicious. Consider collecting changes to ARP caches across endpoints for signs of ARP poisoning.
Why it matters on shift
ARP Cache Poisoning is one of the concrete ways adversaries achieve credential access. 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 credential access, the next tactic is usually Discovery. Search your telemetry for the transition before closing the ticket.
Kill-chain context