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Rogue DHCP Server

Medium Resolved
ALR-00071 · 2026-10-11T19:54:38Z

Description

Rogue DHCP server detected on VLAN 10 from WS-PC-006. Offering IPs in unexpected range. Email Gateway quarantined the device.

Alert Metadata

Alert ID
ALR-00071
Timestamp
2026-10-11T19:54:38Z
Severity
Medium
Status
Resolved
Detection Source
Email Gateway
Assigned Analyst
Sarah Chen

Endpoint Information

Hostname
WS-PC-006
User Account
f.hall
Source IP
194.158.62.147
Destination IP
10.2.55.234
Origin Country
NG Nigeria

MITRE ATT&CK Mapping

Tactic
Discovery
Technique
T1557.003
Reference
attack.mitre.org/techniques/T1557.003

Investigation Timeline

19:54:38 Event ingested by SOC365 Engine
19:54:43 EmilyAI triage started — correlation enrichment
19:54:53 EmilyAI confidence: 78% — escalated to human analyst
19:55:20 Alert assigned to analyst: Sarah Chen
19:56:32 Investigation started — querying SIEM and threat intelligence
19:59:15 Containment action taken — endpoint isolated
20:06:57 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00422 3h ago Rogue DHCP Server Low Open SW-CORE-01
ALR-00047 4h ago Anomalous DNS Query High Escalated WS-PC-006
ALR-00161 5h ago Anomalous DNS Query Medium Escalated WS-PC-006
ALR-00210 8h ago Unusual Outbound Traffic Low Open WS-PC-006
ALR-00223 10h ago Lateral Movement Detected Critical Escalated WS-PC-006