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Certificate Anomaly

Critical Escalated
ALR-00453 · 2026-04-07T11:37:21Z

Description

TLS certificate anomaly detected on WS-PC-003. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00453
Timestamp
2026-04-07T11:37:21Z
Severity
Critical
Status
Escalated
Detection Source
Attack Surface Scanner
Assigned Analyst
James Okonkwo

Endpoint Information

Hostname
WS-PC-003
User Account
k.brown
Source IP
103.148.216.9
Destination IP
10.2.118.140
Origin Country
NG Nigeria

MITRE ATT&CK Mapping

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

Investigation Timeline

11:37:21 Event ingested by SOC365 Engine
11:37:24 EmilyAI triage started — correlation enrichment
11:37:27 EmilyAI confidence: 81% — escalated to human analyst
11:38:03 Alert assigned to analyst: James Okonkwo
11:39:45 Investigation started — querying SIEM and threat intelligence
11:42:11 Containment action taken — endpoint isolated
11:50:02 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00006 43m ago Certificate Anomaly Low Investigating SRV-MAIL-01
ALR-00164 5h ago Certificate Anomaly Medium False Positive SRV-SQL-01
ALR-00147 8h ago Certificate Anomaly Medium False Positive SRV-WEB-01
ALR-00420 10h ago Certificate Anomaly High Open WS-PC-004
ALR-00412 12h ago Shadow IT Discovery Critical Escalated WS-PC-003