There are two pieces of the puzzle here. First 'detecting' L7 attacks and the second is 'mitigating' them.
MARS is not a device meant to 'detect' attacks, this is done by the reporting device (IPS, Firewall with Deep Packet Inspection etc). Once these devices report data (events) into MARS, MARS will parse/process these events into meaningful 'incidents'.
These 'incidents' are generated based on MARS rules. You can configure 'mitigation' (Layer 2) for these incidents/attacks using MARS.
HTH, Please rate if helpful.
Regards
Farrukh
