Suspicious Cloud Sign-In From an Anonymizer or High-Risk Session (via signinlogs)

ATT&CK techniques

Initial Access → Defense Evasion

Recon
Resource Dev
Initial Access
- T1078.004Cloud Accounts
Execution
Persistence
- T1078.004Cloud Accounts
Priv Esc
- T1078.004Cloud Accounts
Defense Evasion
- T1078.004Cloud Accounts
Cred Access
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule detects an Entra ID sign-in flagged with an anonymized IP address or a high real-time risk level, indicating access through Tor or a VPN anonymizer or from a session Microsoft's risk engine deems likely compromised. Compromise of cloud accounts is the most prevalent technique in the Red Canary Threat Detection Report. Detecting anonymized and high-risk sign-ins surfaces suspicious identity access at the authentication boundary.

Reporting behind it

Related detections9 linkedT1078.004 — drag to rearrange

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Suspicious Cloud Sign-In From an Anonymizer or High-Risk Session (via signinlogs)

Pivot detection · T1078.004 · 9 related

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

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