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Certificate Anomaly

High Open
ALR-00371 · 2026-05-23T06:31:34Z

Description

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

Alert Metadata

Alert ID
ALR-00371
Timestamp
2026-05-23T06:31:34Z
Severity
High
Status
Open
Detection Source
DLP Module
Assigned Analyst
James Okonkwo

Endpoint Information

Hostname
SRV-BACKUP-01
User Account
m.taylor
Source IP
91.17.195.154
Destination IP
10.3.99.216
Origin Country
UA Ukraine

MITRE ATT&CK Mapping

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

Investigation Timeline

06:31:34 Event ingested by SOC365 Engine
06:31:36 EmilyAI triage started — correlation enrichment
06:31:49 EmilyAI confidence: 79% — escalated to human analyst
06:31:57 Alert assigned to analyst: James Okonkwo
06:33:05 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00142 2h ago Failed MFA Challenge High Investigating SRV-BACKUP-01
ALR-00296 3h ago Certificate Anomaly Low False Positive FW-EDGE-01
ALR-00235 12h ago Phishing Email Blocked Medium Resolved SRV-BACKUP-01
ALR-00174 14h ago Certificate Anomaly Informational False Positive SRV-WEB-01
ALR-00247 15h ago Privilege Escalation Attempt High Escalated SRV-BACKUP-01