Suspicious Entra Sign-In Interrupt With High Aggregated Risk via AiTM DNS Hijacking (via azure)

ATT&CK techniques

Cred Access → C2

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1557Adversary-in-the-Middle
Discovery
Lateral Movement
Collection
- T1557Adversary-in-the-Middle
C2
- T1071.004DNS
Exfiltration
Impact

What it detects

This rule surfaces Microsoft Entra sign-ins carrying a high aggregated risk score alongside interrupt or success result codes, the pattern seen when SOHO router DNS hijacking redirects victims through an adversary-in-the-middle proxy that replays authentication. Adversaries use the hijacked DNS to intercept credentials and tokens, so high-risk sign-ins clustered with these result codes warrant investigation for token theft and mailbox access.

Reporting behind it

Related detections9 linkedT1071.004 — drag to rearrange

Suspicious DNS Query to Dynamic DNS and Tunneling Providers Abused by RATs

Suspicious UPSTYLE Command Channel Pattern in Web Requests via CVE-2024-3400

Suspicious DNS C2 to Microsoft Typosquat Domain

Suspicious DNS Queries to Simitor Tracking Tunnel Infrastructure

Suspicious DNS Queries to Secshow Open Resolver Scanning Infrastructure

Suspicious Firefox Enterprise Root Certificate Trust Enabled

Malicious Root Certificate Installed via certutil addstore for AiTM Interception

Suspicious OpenMetadata Exploit Interactsh OAST Callback (via process_creation)

Suspicious Code of Conduct Phishing Email From cocinternal.com Sender (via m365)

Suspicious Entra Sign-In Interrupt With High Aggregated Risk via AiTM DNS Hijacking (via azure)

Pivot detection · T1071.004 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

Full detection rule

Unlock this rule to view and copy it

The detection logic is included with a plan. Everything else — context, mappings and implementation details — stays free on this page.

Sign in for 3 free unlocks

Signing in gives you 3 unlocks to spend on any rule in the library. No card, and they do not expire.

Also included

Unlocked rules convert on this page — to Splunk SPL or Splunk — Raw Index SPL or Microsoft Sentinel KQL or Microsoft Sentinel ASIM ASIM KQL or Microsoft Defender XDR KQL or Elastic Security KQL or Elastic Security Lucene or Elastic Security ES|QL or CrowdStrike Falcon CQL or SentinelOne PowerQuery or Palo Alto Cortex XDR XQL or Carbon Black Cloud Platform Search or Carbon Black EDR Process Search or Google Security Operations UDM Search or IBM QRadar AQL or Sumo Logic Cloud SIEM Rules expression or Rapid7 InsightIDR LEQL or Graylog Search or OpenSearch Lucene or OpenSearch PPL PPL or Grafana Loki LogQL or SQLite SQL or Zircolite SQLite — with the log-source profile the engine picked, the field map it used, and everything it could not express. Converting a rule you have unlocked costs no further credit.

See it run on a free rule →Convert your own rule →