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Failed MFA Challenge

High Investigating
ALR-00326 · 2026-07-09T13:17:12Z

Description

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

Alert Metadata

Alert ID
ALR-00326
Timestamp
2026-07-09T13:17:12Z
Severity
High
Status
Investigating
Detection Source
Firewall
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
WS-PC-002
User Account
l.johnson
Source IP
194.195.62.129
Destination IP
10.1.90.177
Origin Country
VN Vietnam

MITRE ATT&CK Mapping

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

Investigation Timeline

13:17:12 Event ingested by SOC365 Engine
13:17:13 EmilyAI triage started — correlation enrichment
13:17:24 EmilyAI confidence: 93% — escalated to human analyst
13:17:27 Alert assigned to analyst: Marcus Webb
13:18:38 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00070 3h ago Privilege Escalation Attempt Medium Open WS-PC-002
ALR-00447 7h ago Credential Stuffing Attempt Critical Investigating WS-PC-002
ALR-00412 7h ago Failed MFA Challenge Medium Investigating WS-LAP-011
ALR-00299 12h ago Failed MFA Challenge Medium Escalated AP-WIFI-03
ALR-00448 15h ago Unusual Outbound Traffic Medium Resolved WS-PC-002