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Rogue DHCP Server

Medium Investigating
ALR-00021 · 2026-10-10T17:12:50Z

Description

Rogue DHCP server detected on VLAN 10 from SRV-MAIL-01. Offering IPs in unexpected range. Attack Surface Scanner quarantined the device.

Alert Metadata

Alert ID
ALR-00021
Timestamp
2026-10-10T17:12:50Z
Severity
Medium
Status
Investigating
Detection Source
Attack Surface Scanner
Assigned Analyst
Marcus Webb

Endpoint Information

Hostname
SRV-MAIL-01
User Account
system
Source IP
194.161.62.204
Destination IP
10.1.191.122
Origin Country
FR France

MITRE ATT&CK Mapping

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

Investigation Timeline

17:12:50 Event ingested by SOC365 Engine
17:12:55 EmilyAI triage started — correlation enrichment
17:13:05 EmilyAI confidence: 85% — escalated to human analyst
17:13:08 Alert assigned to analyst: Marcus Webb
17:14:50 Investigation started — querying SIEM and threat intelligence

Related Alerts

ID Time Alert Severity Status Host
ALR-00187 6h ago Insider Threat Indicator Low False Positive SRV-MAIL-01
ALR-00486 6h ago Rogue DHCP Server Medium Open SRV-WEB-01
ALR-00467 6h ago Rogue DHCP Server Low Escalated SRV-FILE-01
ALR-00264 6h ago Pass-the-Hash Detected Medium Investigating SRV-MAIL-01
ALR-00388 7h ago Certificate Anomaly High Investigating SRV-MAIL-01