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Rogue DHCP Server

Informational Escalated
ALR-00134 · 2026-07-05T09:56:00Z

Description

Rogue DHCP server detected on VLAN 10 from WS-PC-003. Offering IPs in unexpected range. Attack Surface Scanner quarantined the device.

Alert Metadata

Alert ID
ALR-00134
Timestamp
2026-07-05T09:56:00Z
Severity
Informational
Status
Escalated
Detection Source
Attack Surface Scanner
Assigned Analyst
EmilyAI (auto)

Endpoint Information

Hostname
WS-PC-003
User Account
n.clark
Source IP
45.190.148.224
Destination IP
10.1.88.117
Origin Country
RO Romania

MITRE ATT&CK Mapping

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

Investigation Timeline

09:56:00 Event ingested by SOC365 Engine
09:56:01 EmilyAI triage started — correlation enrichment
09:56:13 EmilyAI confidence: 90% — escalated to human analyst
09:56:24 Alert assigned to analyst: EmilyAI (auto)
09:56:59 Investigation started — querying SIEM and threat intelligence
10:01:42 Containment action taken — endpoint isolated
10:10:00 Alert resolved — remediation complete

Related Alerts

ID Time Alert Severity Status Host
ALR-00251 1h ago Pass-the-Hash Detected Medium False Positive WS-PC-003
ALR-00209 8h ago Unauthorised USB Device Low Escalated WS-PC-003
ALR-00332 9h ago Privilege Escalation Attempt Low Open WS-PC-003
ALR-00463 16h ago Rogue DHCP Server Low Escalated SRV-BACKUP-01
ALR-00159 19h ago Rogue DHCP Server High Investigating WS-LAP-010