TA0043 · RECONNAISSANCE
Spearphishing Service
Adversaries may send spearphishing messages via third-party services to elicit sensitive information that can be used during targeting.
Detect it with
Monitor social media traffic for suspicious activity, including messages requesting information as well as abnormal file or data transfers (especially those involving unknown, or otherwise suspicious accounts).
Why it matters on shift
Spearphishing Service 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