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Failed MFA Challenge

Informational Open
ALR-00031 · 2026-10-09T16:12:58Z

Description

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

Alert Metadata

Alert ID
ALR-00031
Timestamp
2026-10-09T16:12:58Z
Severity
Informational
Status
Open
Detection Source
Network IDS
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-DC-01
User Account
d.walker
Source IP
45.190.148.88
Destination IP
10.1.146.54
Origin Country
UA Ukraine

MITRE ATT&CK Mapping

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

Investigation Timeline

16:12:58 Event ingested by SOC365 Engine
16:12:59 EmilyAI triage started — correlation enrichment
16:13:10 EmilyAI confidence: 91% — escalated to human analyst
16:13:39 Alert assigned to analyst: EmilyAI (auto)
16:15:52 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00331 1h ago Failed MFA Challenge Informational Investigating WS-LAP-011
ALR-00182 2h ago Failed MFA Challenge Medium Resolved WS-PC-004
ALR-00019 4h ago Suspicious PowerShell Execution Low Investigating SRV-DC-01
ALR-00385 4h ago Credential Stuffing Attempt Informational Open SRV-DC-01
ALR-00177 6h ago Pass-the-Hash Detected High Escalated SRV-DC-01