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Certificate Anomaly

Medium Open
ALR-00266 · 2026-10-09T10:42:29Z

Description

TLS certificate anomaly detected on WS-LAP-011. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00266
Timestamp
2026-10-09T10:42:29Z
Severity
Medium
Status
Open
Detection Source
Email Gateway
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-LAP-011
User Account
d.walker
Source IP
45.153.148.101
Destination IP
10.0.252.124
Origin Country
RO Romania

MITRE ATT&CK Mapping

Tactic
Defence Evasion
Technique
T1553.004
Reference
attack.mitre.org/techniques/T1553.004

Investigation Timeline

10:42:29 Event ingested by SOC365 Engine
10:42:32 EmilyAI triage started — correlation enrichment
10:42:40 EmilyAI confidence: 86% — escalated to human analyst
10:42:46 Alert assigned to analyst: Sarah Chen
10:43:40 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00258 4h ago Certificate Anomaly Medium Open SW-CORE-01
ALR-00338 11h ago Anomalous DNS Query High Investigating WS-LAP-011
ALR-00409 16h ago Unauthorised USB Device Medium Investigating WS-LAP-011
ALR-00324 17h ago Certificate Anomaly Low Investigating SW-CORE-01
ALR-00265 17h ago Certificate Anomaly Medium Resolved SRV-APP-01