TA0006 · CREDENTIAL ACCESS
Credential Stuffing
Adversaries may use credentials obtained from breach dumps of unrelated accounts to gain access to target accounts through credential overlap.
Detect it with
Monitor authentication logs for system and application login failures of Valid Accounts. If authentication failures are high, then there may be a brute force attempt to gain access to a system using legitimate credentials.
Why it matters on shift
Credential Stuffing 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