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Certificate Anomaly

Informational Investigating
ALR-00142 · 2026-10-08T12:41:37Z

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-00142
Timestamp
2026-10-08T12:41:37Z
Severity
Informational
Status
Investigating
Detection Source
DecoyPulse
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
SRV-MAIL-01
User Account
c.williams
Source IP
91.107.195.25
Destination IP
10.0.134.10
Origin Country
IN India

MITRE ATT&CK Mapping

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

Investigation Timeline

12:41:37 Event ingested by SOC365 Engine
12:41:40 EmilyAI triage started — correlation enrichment
12:41:47 EmilyAI confidence: 87% — escalated to human analyst
12:42:20 Alert assigned to analyst: EmilyAI (auto)
12:43:17 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00228 1h ago Certificate Anomaly Informational Escalated WS-MAC-005
ALR-00377 11h ago Shadow IT Discovery High Escalated SRV-MAIL-01
ALR-00420 14h ago Certificate Anomaly Critical Open VM-DEV-01
ALR-00065 22h ago DLP Policy Violation High Escalated SRV-MAIL-01
ALR-00315 1d ago Rogue DHCP Server Informational False Positive SRV-MAIL-01