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Failed MFA Challenge

Low False Positive
ALR-00173 · 2026-10-08T22:17:46Z

Description

Multiple failed MFA challenges for user 'n.clark' — 12 push notifications in 3 minutes suggesting MFA fatigue attack. DecoyPulse locked account.

Alert Metadata

Alert ID
ALR-00173
Timestamp
2026-10-08T22:17:46Z
Severity
Low
Status
False Positive
Detection Source
DecoyPulse
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-BACKUP-01
User Account
n.clark
Source IP
91.179.195.125
Destination IP
10.0.151.7
Origin Country
IR Iran

MITRE ATT&CK Mapping

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

Investigation Timeline

22:17:46 Event ingested by SOC365 Engine
22:17:50 EmilyAI triage started — correlation enrichment
22:17:57 EmilyAI confidence: 79% — escalated to human analyst
22:18:15 Alert assigned to analyst: EmilyAI (auto)
22:18:31 Investigation started — querying SIEM and threat intelligence
22:23:09 Containment action taken — endpoint isolated
22:36:59 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00443 1h ago Privilege Escalation Attempt Medium Investigating SRV-BACKUP-01
ALR-00347 1h ago Anomalous DNS Query Informational Resolved SRV-BACKUP-01
ALR-00239 4h ago Failed MFA Challenge Low Investigating WS-PC-004
ALR-00417 6h ago Port Scan Detected Low Investigating SRV-BACKUP-01
ALR-00189 10h ago Unauthorised USB Device Medium Open SRV-BACKUP-01