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Failed MFA Challenge

Medium False Positive
ALR-00010 · 2026-10-07T23:54:39Z

Description

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

Alert Metadata

Alert ID
ALR-00010
Timestamp
2026-10-07T23:54:39Z
Severity
Medium
Status
False Positive
Detection Source
Endpoint Agent
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
WS-PC-001
User Account
a.wilson
Source IP
194.153.62.102
Destination IP
10.0.156.247
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

23:54:39 Event ingested by SOC365 Engine
23:54:42 EmilyAI triage started — correlation enrichment
23:54:54 EmilyAI confidence: 87% — escalated to human analyst
23:55:10 Alert assigned to analyst: Marcus Webb
23:57:09 Investigation started — querying SIEM and threat intelligence
00:02:12 Containment action taken — endpoint isolated
00:10:39 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00327 2h ago Credential Stuffing Attempt Medium Open WS-PC-001
ALR-00083 7h ago Shadow IT Discovery Low Open WS-PC-001
ALR-00461 15h ago Suspicious Scheduled Task Low Escalated WS-PC-001
ALR-00450 17h ago Suspicious PowerShell Execution Low Investigating WS-PC-001
ALR-00424 20h ago Failed MFA Challenge Low Investigating WS-PC-004