Update MaliciousWAFSessions.yaml

Changing severity

Detections/AzureDiagnostics/MaliciousWAFSessions.yaml

@@ -6,7 +6,7 @@ description: |
   a given client IP and hostname calls for further investigation of the WAF data in that session, due to the significantly high number 
   of blocked requests and a few unobstructed logs which may be malicious but have passed undetected through the WAF. The successCode 
   variable defines what the detection thinks is a successful status code, and should be altered to fit the environment.’
-severity: Low
+severity: Medium
 requiredDataConnectors:
   - connectorId: WAF
     dataTypes: