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Rogue DHCP Server

High Open
ALR-00259 · 2026-07-08T21:22:54Z

Description

Rogue DHCP server detected on VLAN 10 from WS-LAP-011. Offering IPs in unexpected range. Firewall quarantined the device.

Alert Metadata

Alert ID
ALR-00259
Timestamp
2026-07-08T21:22:54Z
Severity
High
Status
Open
Detection Source
Firewall
Assigned Analyst
Anika Patel

Endpoint Information

Hostname
WS-LAP-011
User Account
p.thomas
Source IP
91.5.195.27
Destination IP
10.0.22.131
Origin Country
CN China

MITRE ATT&CK Mapping

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

Investigation Timeline

21:22:54 Event ingested by SOC365 Engine
21:22:57 EmilyAI triage started — correlation enrichment
21:23:01 EmilyAI confidence: 96% — escalated to human analyst
21:23:26 Alert assigned to analyst: Anika Patel
21:24:26 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00465 12h ago Ransomware Behaviour Detected Low Open WS-LAP-011
ALR-00285 13h ago Rogue DHCP Server High Investigating WS-LAP-011
ALR-00304 17h ago Rogue DHCP Server Medium Resolved SRV-APP-01
ALR-00093 17h ago Privilege Escalation Attempt High Escalated WS-LAP-011
ALR-00363 19h ago Failed MFA Challenge Low Investigating WS-LAP-011