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Failed MFA Challenge

Low False Positive
ALR-00429 · 2026-05-22T04:17:40Z

Description

Multiple failed MFA challenges for user 'p.thomas' — 12 push notifications in 3 minutes suggesting MFA fatigue attack. Endpoint Agent locked account.

Alert Metadata

Alert ID
ALR-00429
Timestamp
2026-05-22T04:17:40Z
Severity
Low
Status
False Positive
Detection Source
Endpoint Agent
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-001
User Account
p.thomas
Source IP
103.212.216.23
Destination IP
10.2.111.113
Origin Country
RU Russia

MITRE ATT&CK Mapping

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

Investigation Timeline

04:17:40 Event ingested by SOC365 Engine
04:17:42 EmilyAI triage started — correlation enrichment
04:17:45 EmilyAI confidence: 83% — escalated to human analyst
04:18:11 Alert assigned to analyst: EmilyAI (auto)
04:18:30 Investigation started — querying SIEM and threat intelligence
04:20:43 Containment action taken — endpoint isolated
04:30:24 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00413 1h ago Unauthorised USB Device Medium Resolved WS-PC-001
ALR-00291 9h ago Shadow IT Discovery High Open WS-PC-001
ALR-00289 13h ago Credential Stuffing Attempt Medium Investigating WS-PC-001
ALR-00063 23h ago DecoyPulse Honeypot Triggered Low Resolved WS-PC-001
ALR-00032 1d ago Failed MFA Challenge High Open SRV-WEB-01