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Certificate Anomaly

Medium Open
ALR-00258 · 2026-10-11T23:55:29Z

Description

TLS certificate anomaly detected on SW-CORE-01. Self-signed certificate on port 443 does not match expected corporate CA chain.

Alert Metadata

Alert ID
ALR-00258
Timestamp
2026-10-11T23:55:29Z
Severity
Medium
Status
Open
Detection Source
Endpoint Agent
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
SW-CORE-01
User Account
system
Source IP
185.159.220.248
Destination IP
10.2.216.59
Origin Country
US United States

MITRE ATT&CK Mapping

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

Investigation Timeline

23:55:29 Event ingested by SOC365 Engine
23:55:32 EmilyAI triage started — correlation enrichment
23:55:43 EmilyAI confidence: 85% — escalated to human analyst
23:55:47 Alert assigned to analyst: Marcus Webb
23:57:22 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00125 3h ago Ransomware Behaviour Detected Informational False Positive SW-CORE-01
ALR-00348 5h ago Credential Stuffing Attempt Low Escalated SW-CORE-01
ALR-00332 11h ago DLP Policy Violation High Escalated SW-CORE-01
ALR-00305 14h ago Failed MFA Challenge Critical Escalated SW-CORE-01
ALR-00324 17h ago Certificate Anomaly Low Investigating SW-CORE-01