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Failed MFA Challenge

Informational Resolved
ALR-00407 · 2026-05-25T12:00:20Z

Description

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

Alert Metadata

Alert ID
ALR-00407
Timestamp
2026-05-25T12:00:20Z
Severity
Informational
Status
Resolved
Detection Source
Firewall
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
FW-EDGE-01
User Account
d.walker
Source IP
194.133.62.12
Destination IP
10.1.184.29
Origin Country
BR Brazil

MITRE ATT&CK Mapping

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

Investigation Timeline

12:00:20 Event ingested by SOC365 Engine
12:00:23 EmilyAI triage started — correlation enrichment
12:00:27 EmilyAI confidence: 87% — escalated to human analyst
12:00:58 Alert assigned to analyst: EmilyAI (auto)
12:02:03 Investigation started — querying SIEM and threat intelligence
12:07:48 Containment action taken — endpoint isolated
12:15:14 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00128 4h ago Anomalous DNS Query Low Resolved FW-EDGE-01
ALR-00335 4h ago Shadow IT Discovery Low Resolved FW-EDGE-01
ALR-00222 11h ago Tor Exit Node Connection Low Investigating FW-EDGE-01
ALR-00055 15h ago Pass-the-Hash Detected Medium Open FW-EDGE-01
ALR-00141 16h ago Failed MFA Challenge Medium Investigating AP-WIFI-03