Synopsis
Activation Period |
14 Days |
Training Period |
30 Days |
Test Period |
N/A (single event) |
Deduplication Period |
1 Day |
Required Data |
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Detection Modules |
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ATT&CK Tactic |
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ATT&CK Technique |
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Severity |
Medium |
Description
A DHCP response was sent from an unknown DHCP server.
Attackers may send a DHCP response to a host in his LAN to inject a DNS server, route or WPAD server.
Attacker's Goals
The attacker is attempting a man-in-the-middle NTLM relay attack to intercept authentication attempts and move laterally within an environment.
Investigative actions
- Check if the source agent is a legitimate DHCP server.
- Check if the attacked host send DNS queries to an unusual IP.
- Check if the attacked host send WPAD HTTP/S requests to an unusual host.