TA0001 · INITIAL ACCESS
Spearphishing Attachment
Adversaries may send spearphishing emails with a malicious attachment in an attempt to gain access to victim systems. Spearphishing attachment is a specific variant of spearphishing.
Detect it with
Network intrusion detection systems and email gateways can be used to detect spearphishing with malicious attachments in transit. Detonation chambers may also be used to identify malicious attachments.
Why it matters on shift
Spearphishing Attachment is one of the concrete ways adversaries achieve initial 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 initial access, the next tactic is usually Execution. Search your telemetry for the transition before closing the ticket.
Kill-chain context