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Certificate Anomaly

Medium False Positive
ALR-00420 · 2026-04-11T05:04:49Z

Description

TLS certificate anomaly detected on WS-PC-004. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00420
Timestamp
2026-04-11T05:04:49Z
Severity
Medium
Status
False Positive
Detection Source
Email Gateway
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-PC-004
User Account
a.wilson
Source IP
103.139.216.164
Destination IP
10.2.84.29
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

05:04:49 Event ingested by SOC365 Engine
05:04:51 EmilyAI triage started — correlation enrichment
05:05:04 EmilyAI confidence: 98% — escalated to human analyst
05:05:13 Alert assigned to analyst: Sarah Chen
05:07:26 Investigation started — querying SIEM and threat intelligence
05:11:24 Containment action taken — endpoint isolated
05:23:31 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00342 4m ago Certificate Anomaly Low Open WS-LAP-011
ALR-00397 3h ago Brute Force SSH Informational False Positive WS-PC-004
ALR-00439 4h ago Certificate Anomaly Medium False Positive SW-CORE-01
ALR-00328 5h ago Certificate Anomaly Low False Positive WS-PC-001
ALR-00147 15h ago Lateral Movement Detected High Investigating WS-PC-004