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Failed MFA Challenge

Low Resolved
ALR-00204 · 2026-07-06T06:14:03Z

Description

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

Alert Metadata

Alert ID
ALR-00204
Timestamp
2026-07-06T06:14:03Z
Severity
Low
Status
Resolved
Detection Source
Firewall
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-MAIL-01
User Account
c.williams
Source IP
45.176.148.137
Destination IP
10.0.199.14
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

06:14:03 Event ingested by SOC365 Engine
06:14:08 EmilyAI triage started — correlation enrichment
06:14:08 EmilyAI confidence: 89% — escalated to human analyst
06:14:39 Alert assigned to analyst: EmilyAI (auto)
06:15:18 Investigation started — querying SIEM and threat intelligence
06:17:26 Containment action taken — endpoint isolated
06:25:30 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00475 5h ago Credential Stuffing Attempt Informational False Positive SRV-MAIL-01
ALR-00376 12h ago Failed MFA Challenge Informational Investigating SRV-BACKUP-01
ALR-00350 21h ago Lateral Movement Detected High Investigating SRV-MAIL-01
ALR-00213 22h ago DecoyPulse Honeypot Triggered Medium False Positive SRV-MAIL-01
ALR-00126 1d ago Pass-the-Hash Detected Informational False Positive SRV-MAIL-01