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Certificate Anomaly

Medium False Positive
ALR-00478 · 2026-10-09T14:58:19Z

Description

TLS certificate anomaly detected on WS-MAC-005. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00478
Timestamp
2026-10-09T14:58:19Z
Severity
Medium
Status
False Positive
Detection Source
DLP Module
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-MAC-005
User Account
l.johnson
Source IP
91.2.195.72
Destination IP
10.0.139.66
Origin Country
US United States

MITRE ATT&CK Mapping

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

Investigation Timeline

14:58:19 Event ingested by SOC365 Engine
14:58:22 EmilyAI triage started — correlation enrichment
14:58:24 EmilyAI confidence: 88% — escalated to human analyst
14:58:52 Alert assigned to analyst: Sarah Chen
15:00:52 Investigation started — querying SIEM and threat intelligence
15:04:10 Containment action taken — endpoint isolated
15:17:57 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00298 1h ago Certificate Anomaly Medium False Positive VM-DEV-01
ALR-00288 1h ago Certificate Anomaly Medium Escalated WS-MAC-005
ALR-00358 3h ago C2 Beacon Activity High Open WS-MAC-005
ALR-00251 16h ago Credential Stuffing Attempt Low False Positive WS-MAC-005
ALR-00178 19h ago Insider Threat Indicator Medium False Positive WS-MAC-005