CaptiveCrunch - DNS query for doppelganger domain mimicking Microsoft online services
This rule detects DNS queries, HTTP Host headers, and TLS SNI values indicative of interaction with specific doppelganger domains designed to impersonate Microsoft online services (ms365-device.com, ms365-live.com, m365-owa.com, owa-ms365.com). Such activity is commonly associated with phishing or C2 infrastructure targeting Microsoft 365 environments.
Suricata
