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Failed MFA Challenge

Medium False Positive
ALR-00016 · 2026-07-11T17:19:33Z

Description

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

Alert Metadata

Alert ID
ALR-00016
Timestamp
2026-07-11T17:19:33Z
Severity
Medium
Status
False Positive
Detection Source
EmilyAI Triage
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
SRV-BACKUP-01
User Account
p.thomas
Source IP
91.134.195.229
Destination IP
10.0.12.182
Origin Country
NG Nigeria

MITRE ATT&CK Mapping

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

Investigation Timeline

17:19:33 Event ingested by SOC365 Engine
17:19:37 EmilyAI triage started — correlation enrichment
17:19:47 EmilyAI confidence: 92% — escalated to human analyst
17:20:17 Alert assigned to analyst: Sarah Chen
17:21:24 Investigation started — querying SIEM and threat intelligence
17:27:47 Containment action taken — endpoint isolated
17:37:19 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00406 4h ago Credential Stuffing Attempt High Open SRV-BACKUP-01
ALR-00310 5h ago Failed MFA Challenge Low Open FW-EDGE-01
ALR-00097 6h ago Failed MFA Challenge Informational Open WS-LAP-011
ALR-00302 10h ago Malware Signature Match Low Investigating SRV-BACKUP-01
ALR-00433 10h ago Failed MFA Challenge Low Resolved WS-LAP-012