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Certificate Anomaly

Medium False Positive
ALR-00191 · 2026-10-11T03:01:40Z

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-00191
Timestamp
2026-10-11T03:01:40Z
Severity
Medium
Status
False Positive
Detection Source
Endpoint Agent
Assigned Analyst
Anika Patel

Endpoint Information

Hostname
WS-PC-002
User Account
d.walker
Source IP
185.20.220.164
Destination IP
10.0.161.225
Origin Country
NG Nigeria

MITRE ATT&CK Mapping

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

Investigation Timeline

03:01:40 Event ingested by SOC365 Engine
03:01:45 EmilyAI triage started — correlation enrichment
03:01:50 EmilyAI confidence: 84% — escalated to human analyst
03:02:23 Alert assigned to analyst: Anika Patel
03:03:31 Investigation started — querying SIEM and threat intelligence
03:09:10 Containment action taken — endpoint isolated
03:17:04 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00228 1h ago Certificate Anomaly Informational Escalated WS-MAC-005
ALR-00420 14h ago Certificate Anomaly Critical Open VM-DEV-01
ALR-00453 17h ago Suspicious Scheduled Task Low Resolved WS-PC-002
ALR-00454 18h ago C2 Beacon Activity High Open WS-PC-002
ALR-00395 1d ago Anomalous DNS Query Low Open WS-PC-002