Security checks / Check reference / Risky users & sign-ins
Risk Detection Malicious IP Address
Critical Severity Microsoft 365 security check in the Risky users & sign-ins domain.
Sign-in from a known malicious IP address. Malicious IPs are associated with active attack infrastructure. Siemserva runs this check automatically across your tenant and maps every finding to the compliance frameworks below.
Check summary
What this check verifies
Sign-in from a known malicious IP address.
Why it matters
Malicious IPs are associated with active attack infrastructure. Sign-ins from these IPs are almost certainly unauthorized
How to fix it
Block the IP in CA named locations; correlate with other users who signed in from the same IP; rotate credentials
Siemserva flags every tenant where this check fails and, with Senserva Trustworthy AI remediation, can propose a validated fix you approve before it applies.
Ask your own AI about this check
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Compliance framework mappings
Findings from this check serve as evidence for:
References
Related Risky users & sign-ins checks
Common questions
What does the Risk Detection Malicious IP Address check verify?
Sign-in from a known malicious IP address. It is a Critical Severity check in the Risky users & sign-ins domain, one of the 650+ checks Siemserva runs across Microsoft 365, Intune, Defender, and Entra ID.
How do I fix a Risk Detection Malicious IP Address finding?
Block the IP in CA named locations; correlate with other users who signed in from the same IP; rotate credentials Siemserva ranks the finding by Severity and, with Senserva Trustworthy AI, can propose a validated, approve-before-apply configuration fix.
Which compliance frameworks does this check evidence?
Findings from this check map to SCuBA, MCSB, NIST, SOC2, CIS, HIPAA, including SCuBA policy MS.AAD.3.3v2, MS.AAD.3.4v1, MS.AAD.3.5v1, and MCSB controls LT-3, IM-6, IR-1. That mapping is what turns a scan finding into audit evidence.
Can I ask my own AI about this check?
Yes. This page includes a free copy-paste AI prompt carrying the check's facts: what it verifies, the risk, the remediation, and the framework mappings. Paste it into Claude, ChatGPT, or Copilot; cite-worthy detail without giving an AI access to your tenant.
All 672 checks with severities and mappings: the Microsoft 365 security checks catalog.