TA0043 · RECONNAISSANCE
IP Addresses
Adversaries may gather the victim's IP addresses that can be used during targeting. Public IP addresses may be allocated to organizations by block, or a range of sequential addresses.
Detect it with
Much of this activity may have a very high occurrence and associated false positive rate, as well as potentially taking place outside the visibility of the target organization, making detection difficult for defenders.
Why it matters on shift
IP Addresses is one of the concrete ways adversaries achieve reconnaissance. 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 reconnaissance, the next tactic is usually Resource Development. Search your telemetry for the transition before closing the ticket.
Kill-chain context