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Failed MFA Challenge

Informational Open
ALR-00374 · 2026-05-26T05:53:01Z

Description

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

Alert Metadata

Alert ID
ALR-00374
Timestamp
2026-05-26T05:53:01Z
Severity
Informational
Status
Open
Detection Source
Firewall
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-001
User Account
n.clark
Source IP
194.226.62.126
Destination IP
10.0.222.58
Origin Country
IN India

MITRE ATT&CK Mapping

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

Investigation Timeline

05:53:01 Event ingested by SOC365 Engine
05:53:05 EmilyAI triage started — correlation enrichment
05:53:16 EmilyAI confidence: 91% — escalated to human analyst
05:53:42 Alert assigned to analyst: EmilyAI (auto)
05:53:58 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00256 6h ago Shadow IT Discovery Low Escalated WS-PC-001
ALR-00163 7h ago Anomalous DNS Query Medium False Positive WS-PC-001
ALR-00381 11h ago Suspicious PowerShell Execution Low Escalated WS-PC-001
ALR-00278 14h ago Failed MFA Challenge Informational Resolved WS-PC-003
ALR-00166 15h ago Insider Threat Indicator Informational Investigating WS-PC-001