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Certificate Anomaly

Medium Investigating
ALR-00340 · 2026-10-11T12:01:56Z

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-00340
Timestamp
2026-10-11T12:01:56Z
Severity
Medium
Status
Investigating
Detection Source
DecoyPulse
Assigned Analyst
James Okonkwo

Endpoint Information

Hostname
WS-PC-002
User Account
l.johnson
Source IP
185.159.220.187
Destination IP
10.3.146.37
Origin Country
US United States

MITRE ATT&CK Mapping

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

Investigation Timeline

12:01:56 Event ingested by SOC365 Engine
12:02:01 EmilyAI triage started — correlation enrichment
12:02:04 EmilyAI confidence: 91% — escalated to human analyst
12:02:41 Alert assigned to analyst: James Okonkwo
12:02:59 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00061 5h ago Certificate Anomaly High Escalated WS-PC-006
ALR-00363 10h ago Shadow IT Discovery Low Open WS-PC-002
ALR-00486 22h ago Rogue DHCP Server Low Resolved WS-PC-002
ALR-00120 1d ago Anomalous DNS Query Medium Investigating WS-PC-002
ALR-00449 1d ago Malware Signature Match Low Investigating WS-PC-002