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Certificate Anomaly

Low Escalated
ALR-00259 · 2026-05-23T10:29:24Z

Description

TLS certificate anomaly detected on WS-PC-001. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00259
Timestamp
2026-05-23T10:29:24Z
Severity
Low
Status
Escalated
Detection Source
DecoyPulse
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-001
User Account
k.brown
Source IP
185.94.220.199
Destination IP
10.3.71.216
Origin Country
GB United Kingdom

MITRE ATT&CK Mapping

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

Investigation Timeline

10:29:24 Event ingested by SOC365 Engine
10:29:29 EmilyAI triage started — correlation enrichment
10:29:29 EmilyAI confidence: 91% — escalated to human analyst
10:30:02 Alert assigned to analyst: EmilyAI (auto)
10:32:10 Investigation started — querying SIEM and threat intelligence
10:36:21 Containment action taken — endpoint isolated
10:46:07 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00066 4h ago Certificate Anomaly Low Escalated SRV-BACKUP-01
ALR-00096 5h ago Credential Stuffing Attempt Low False Positive WS-PC-001
ALR-00159 9h ago Certificate Anomaly High Open WS-LAP-011
ALR-00398 13h ago Certificate Anomaly Low Escalated SRV-APP-01
ALR-00157 19h ago Certificate Anomaly Medium Escalated WS-PC-003