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Certificate Anomaly

Medium False Positive
ALR-00439 · 2026-04-12T11:09:45Z

Description

TLS certificate anomaly detected on SW-CORE-01. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00439
Timestamp
2026-04-12T11:09:45Z
Severity
Medium
Status
False Positive
Detection Source
Cloud Connector
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
SW-CORE-01
User Account
l.johnson
Source IP
91.189.195.155
Destination IP
10.1.127.10
Origin Country
GB United Kingdom

MITRE ATT&CK Mapping

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

Investigation Timeline

11:09:45 Event ingested by SOC365 Engine
11:09:50 EmilyAI triage started — correlation enrichment
11:09:57 EmilyAI confidence: 79% — escalated to human analyst
11:10:17 Alert assigned to analyst: Sarah Chen
11:12:32 Investigation started — querying SIEM and threat intelligence
11:18:21 Containment action taken — endpoint isolated
11:24:52 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00342 4m ago Certificate Anomaly Low Open WS-LAP-011
ALR-00320 4h ago Kerberoasting Attempt Medium Escalated SW-CORE-01
ALR-00328 5h ago Certificate Anomaly Low False Positive WS-PC-001
ALR-00090 10h ago Suspicious PowerShell Execution Medium Investigating SW-CORE-01
ALR-00324 21h ago Brute Force SSH Medium Investigating SW-CORE-01