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Certificate Anomaly

Medium Open
ALR-00091 · 2026-10-06T16:16:51Z

Description

TLS certificate anomaly detected on WS-PC-002. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00091
Timestamp
2026-10-06T16:16:51Z
Severity
Medium
Status
Open
Detection Source
Dark Web Monitor
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-PC-002
User Account
a.wilson
Source IP
185.175.220.110
Destination IP
10.1.136.115
Origin Country
CN China

MITRE ATT&CK Mapping

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

Investigation Timeline

16:16:51 Event ingested by SOC365 Engine
16:16:53 EmilyAI triage started — correlation enrichment
16:17:02 EmilyAI confidence: 86% — escalated to human analyst
16:17:07 Alert assigned to analyst: Sarah Chen
16:18:39 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00230 5h ago Certificate Anomaly Informational Open VM-DEV-01
ALR-00274 5h ago Certificate Anomaly Low Escalated SRV-WEB-01
ALR-00461 9h ago DLP Policy Violation Low Escalated WS-PC-002
ALR-00351 12h ago DLP Policy Violation Low False Positive WS-PC-002
ALR-00099 15h ago Rogue DHCP Server Low Resolved WS-PC-002