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Failed MFA Challenge

Medium False Positive
ALR-00277 · 2026-04-10T09:40:53Z

Description

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

Alert Metadata

Alert ID
ALR-00277
Timestamp
2026-04-10T09:40:53Z
Severity
Medium
Status
False Positive
Detection Source
Endpoint Agent
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-PC-001
User Account
f.hall
Source IP
103.198.216.169
Destination IP
10.0.177.148
Origin Country
GB United Kingdom

MITRE ATT&CK Mapping

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

Investigation Timeline

09:40:53 Event ingested by SOC365 Engine
09:40:57 EmilyAI triage started — correlation enrichment
09:40:58 EmilyAI confidence: 93% — escalated to human analyst
09:41:12 Alert assigned to analyst: Sarah Chen
09:42:59 Investigation started — querying SIEM and threat intelligence
09:45:09 Containment action taken — endpoint isolated
09:56:10 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00162 2h ago Failed MFA Challenge Low Resolved SRV-DC-01
ALR-00362 2h ago Brute Force SSH Low Resolved WS-PC-001
ALR-00497 3h ago Brute Force SSH Medium Open WS-PC-001
ALR-00014 17h ago Rogue DHCP Server Critical Escalated WS-PC-001
ALR-00215 21h ago DecoyPulse Honeypot Triggered Medium False Positive WS-PC-001