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Failed MFA Challenge

Critical Open
ALR-00434 · 2026-10-09T13:55:59Z

Description

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

Alert Metadata

Alert ID
ALR-00434
Timestamp
2026-10-09T13:55:59Z
Severity
Critical
Status
Open
Detection Source
Network IDS
Assigned Analyst
Emma Richardson

Endpoint Information

Hostname
SRV-FILE-01
User Account
r.davies
Source IP
91.110.195.191
Destination IP
10.0.13.139
Origin Country
VN Vietnam

MITRE ATT&CK Mapping

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

Investigation Timeline

13:55:59 Event ingested by SOC365 Engine
13:56:01 EmilyAI triage started — correlation enrichment
13:56:06 EmilyAI confidence: 92% — escalated to human analyst
13:56:19 Alert assigned to analyst: Emma Richardson
13:57:28 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00447 11h ago Lateral Movement Detected Low Resolved SRV-FILE-01
ALR-00355 13h ago Failed MFA Challenge Low False Positive WS-LAP-011
ALR-00417 15h ago Rogue DHCP Server Low Investigating SRV-FILE-01
ALR-00190 16h ago Privilege Escalation Attempt Low Open SRV-FILE-01
ALR-00143 22h ago Brute Force SSH Low False Positive SRV-FILE-01