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Certificate Anomaly

Medium Resolved
ALR-00470 · 2026-05-24T11:15:43Z

Description

TLS certificate anomaly detected on WS-PC-004. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00470
Timestamp
2026-05-24T11:15:43Z
Severity
Medium
Status
Resolved
Detection Source
DecoyPulse
Assigned Analyst
Anika Patel

Endpoint Information

Hostname
WS-PC-004
User Account
h.roberts
Source IP
103.152.216.187
Destination IP
10.0.219.155
Origin Country
IN India

MITRE ATT&CK Mapping

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

Investigation Timeline

11:15:43 Event ingested by SOC365 Engine
11:15:47 EmilyAI triage started — correlation enrichment
11:15:57 EmilyAI confidence: 81% — escalated to human analyst
11:16:21 Alert assigned to analyst: Anika Patel
11:18:09 Investigation started — querying SIEM and threat intelligence
11:23:47 Containment action taken — endpoint isolated
11:27:23 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00146 2h ago Pass-the-Hash Detected Medium Resolved WS-PC-004
ALR-00321 3h ago Unauthorised USB Device Low Open WS-PC-004
ALR-00211 6h ago Suspicious PowerShell Execution High Escalated WS-PC-004
ALR-00491 7h ago Tor Exit Node Connection Low False Positive WS-PC-004
ALR-00267 9h ago Unusual Outbound Traffic High Open WS-PC-004