ATT&CK T1041 - Exfiltration Over C2: Large HTTP POST
This rule detects large HTTP POST requests originating from the internal network ($HOME_NET) to any external destination. It specifically looks for HTTP POST methods and a data size greater than 10,000 bytes. A detection filter is applied to track by source IP, triggering an alert if 20 such large POST requests are observed within a 60-second window. This behavior is indicative of potential data exfiltration over command and control (C2) channels, as large amounts of data are being sent out of the network.
Suricata
