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Failed MFA Challenge

High Investigating
ALR-00373 · 2026-07-06T14:43:29Z

Description

Multiple failed MFA challenges for user 'k.brown' — 12 push notifications in 3 minutes suggesting MFA fatigue attack. Network IDS locked account.

Alert Metadata

Alert ID
ALR-00373
Timestamp
2026-07-06T14:43:29Z
Severity
High
Status
Investigating
Detection Source
Network IDS
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-LAP-010
User Account
k.brown
Source IP
194.126.62.33
Destination IP
10.0.243.171
Origin Country
GB United Kingdom

MITRE ATT&CK Mapping

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

Investigation Timeline

14:43:29 Event ingested by SOC365 Engine
14:43:31 EmilyAI triage started — correlation enrichment
14:43:34 EmilyAI confidence: 84% — escalated to human analyst
14:44:00 Alert assigned to analyst: Sarah Chen
14:45:12 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00100 2h ago Suspicious PowerShell Execution Low Open WS-LAP-010
ALR-00500 4h ago Suspicious PowerShell Execution High Escalated WS-LAP-010
ALR-00095 15h ago Privilege Escalation Attempt Critical Open WS-LAP-010
ALR-00483 1d ago Port Scan Detected Informational Resolved WS-LAP-010
ALR-00160 1d ago Failed MFA Challenge High Open SRV-APP-01