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Failed MFA Challenge

Low Resolved
ALR-00275 · 2026-05-26T00:14:49Z

Description

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

Alert Metadata

Alert ID
ALR-00275
Timestamp
2026-05-26T00:14:49Z
Severity
Low
Status
Resolved
Detection Source
DecoyPulse
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-003
User Account
p.thomas
Source IP
103.182.216.72
Destination IP
10.2.221.178
Origin Country
BR Brazil

MITRE ATT&CK Mapping

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

Investigation Timeline

00:14:49 Event ingested by SOC365 Engine
00:14:52 EmilyAI triage started — correlation enrichment
00:15:00 EmilyAI confidence: 90% — escalated to human analyst
00:15:20 Alert assigned to analyst: EmilyAI (auto)
00:16:18 Investigation started — querying SIEM and threat intelligence
00:21:50 Containment action taken — endpoint isolated
00:32:34 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00383 6h ago Unauthorised USB Device Medium Investigating WS-PC-003
ALR-00019 12h ago DLP Policy Violation Low Resolved WS-PC-003
ALR-00455 1d ago Malware Signature Match Informational Investigating WS-PC-003
ALR-00036 1d ago Failed MFA Challenge Low Resolved SRV-BACKUP-01
ALR-00107 1d ago Insider Threat Indicator Low False Positive WS-PC-003