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Failed MFA Challenge

Medium Resolved
ALR-00126 · 2026-04-08T23:40:26Z

Description

Multiple failed MFA challenges for user 'e.evans' — 12 push notifications in 3 minutes suggesting MFA fatigue attack. Firewall locked account.

Alert Metadata

Alert ID
ALR-00126
Timestamp
2026-04-08T23:40:26Z
Severity
Medium
Status
Resolved
Detection Source
Firewall
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-LAP-011
User Account
e.evans
Source IP
103.205.216.188
Destination IP
10.1.63.58
Origin Country
FR France

MITRE ATT&CK Mapping

Tactic
Credential Access
Technique
T1621
Reference
attack.mitre.org/techniques/T1621

Investigation Timeline

23:40:26 Event ingested by SOC365 Engine
23:40:29 EmilyAI triage started — correlation enrichment
23:40:34 EmilyAI confidence: 85% — escalated to human analyst
23:40:45 Alert assigned to analyst: Sarah Chen
23:42:35 Investigation started — querying SIEM and threat intelligence
23:44:48 Containment action taken — endpoint isolated
23:51:28 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00067 58m ago Anomalous DNS Query Low Escalated WS-LAP-011
ALR-00408 1h ago Certificate Anomaly Low Escalated WS-LAP-011
ALR-00216 1h ago Failed MFA Challenge Medium Investigating WS-PC-004
ALR-00479 4h ago Ransomware Behaviour Detected High Investigating WS-LAP-011
ALR-00481 5h ago Failed MFA Challenge High Investigating SW-CORE-01