No CloudWatch alarm for console sign-in without MFA

Severity: High
Service: Monitoring and alarms
Check ID: CLOUDWATCH_ALARM_CONSOLE_NO_MFA

What this check finds

No metric filter and alarm detect console logins that occur without MFA. This misses unprotected account access events in real time. CIS v1.4 §4.2.

Passing looks like: CloudWatch alarm for console sign-in without MFA configured.

How to fix it

Create a metric filter with pattern: {($.eventName = "ConsoleLogin") && ($.additionalEventData.MFAUsed != "Yes")} and an alarm with SNS notification.

Compliance controls it is evidence for

A failing result counts against these controls in KloudLytics; a passing one is evidence towards them. How compliance mapping works

Compliance controls mapped to No CloudWatch alarm for console sign-in without MFA
Framework	Controls
CIS AWS Foundations Benchmark v5.0.0	4.2 Ensure management console sign-in without MFA is monitored
NIST SP 800-53 Rev5 (Moderate)	AU-6 Audit Record Review, Analysis, and Reporting IA-2 Identification and Authentication (Organizational Users) SI-4 System Monitoring
NIST Cybersecurity Framework 2.0	PR.AA-03 Users, services, and hardware are authenticated DE.AE-02 Adverse events are analyzed DE.CM-01 Networks are monitored
ISO/IEC 27001:2022 Annex A	A.8.5 Secure authentication A.8.16 Monitoring activities

Checked on every scan

KloudLytics runs this check each time it scans a connected AWS account, through a read-only role, and lists every affected resource with its region. On Pro and Business a fix is written for the specific resource rather than the general case above. The exact access it needs

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