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Certificate Anomaly

Medium Escalated
ALR-00002 · 2026-10-07T08:35:22Z

Description

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

Alert Metadata

Alert ID
ALR-00002
Timestamp
2026-10-07T08:35:22Z
Severity
Medium
Status
Escalated
Detection Source
SOC365 Engine
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
SRV-MAIL-01
User Account
c.williams
Source IP
91.122.195.37
Destination IP
10.1.211.214
Origin Country
CN China

MITRE ATT&CK Mapping

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

Investigation Timeline

08:35:22 Event ingested by SOC365 Engine
08:35:26 EmilyAI triage started — correlation enrichment
08:35:27 EmilyAI confidence: 93% — escalated to human analyst
08:35:59 Alert assigned to analyst: Marcus Webb
08:36:44 Investigation started — querying SIEM and threat intelligence
08:41:23 Containment action taken — endpoint isolated
08:45:59 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00229 3h ago Port Scan Detected Medium Resolved SRV-MAIL-01
ALR-00215 3h ago Kerberoasting Attempt Medium Open SRV-MAIL-01
ALR-00162 7h ago Tor Exit Node Connection Low Resolved SRV-MAIL-01
ALR-00465 11h ago Certificate Anomaly High Escalated SRV-MAIL-01
ALR-00348 13h ago Credential Stuffing Attempt Low False Positive SRV-MAIL-01