TA0010 · EXFILTRATION
Data Transfer Size Limits
An adversary may exfiltrate data in fixed size chunks instead of whole files or limit packet sizes below certain thresholds. This approach may be used to avoid triggering network data transfer threshold alerts.
Detect it with
Analyze network data for uncommon data flows (e.g., a client sending significantly more data than it receives from a server).
Why it matters on shift
Data Transfer Size Limits is one of the concrete ways adversaries achieve exfiltration. 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 exfiltration, the next tactic is usually Impact. Search your telemetry for the transition before closing the ticket.
Kill-chain context