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Failed MFA Challenge

Low Resolved
ALR-00484 · 2026-04-09T01:44:35Z

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-00484
Timestamp
2026-04-09T01:44:35Z
Severity
Low
Status
Resolved
Detection Source
EmilyAI Triage
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-LAP-010
User Account
p.thomas
Source IP
103.239.216.148
Destination IP
10.0.244.173
Origin Country
RU Russia

MITRE ATT&CK Mapping

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

Investigation Timeline

01:44:35 Event ingested by SOC365 Engine
01:44:38 EmilyAI triage started — correlation enrichment
01:44:49 EmilyAI confidence: 96% — escalated to human analyst
01:44:50 Alert assigned to analyst: EmilyAI (auto)
01:46:30 Investigation started — querying SIEM and threat intelligence
01:50:07 Containment action taken — endpoint isolated
01:57:54 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00360 2h ago Suspicious PowerShell Execution Informational False Positive WS-LAP-010
ALR-00007 3h ago Failed MFA Challenge Low Investigating SRV-BACKUP-01
ALR-00258 3h ago Ransomware Behaviour Detected Informational Open WS-LAP-010
ALR-00086 5h ago Failed MFA Challenge Informational Investigating SRV-WEB-01
ALR-00296 11h ago Pass-the-Hash Detected Informational Resolved WS-LAP-010