Synopsis
Activation Period |
14 Days |
Training Period |
30 Days |
Test Period |
10 Minutes |
Deduplication Period |
1 Day |
Required Data |
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Detection Modules |
Identity Analytics |
Detector Tags |
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ATT&CK Tactic |
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ATT&CK Technique |
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Severity |
Informational |
Description
Multiple NTLM authentications were made to the same workstation and user from different IPs.
This might indicate a potential NTLM Relay attack.
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
- Ensure that the alerted host is not a NAT device or proxy that replicates or forwards network traffic as part of its expected operational behavior.
- Check if the workstation supports weak, outdated versions of NTLM.
- Check for network activity to and from the suspicious IP address and workstation, to verify if they were compromised.
- Check for process activity to and from the suspicious IP address to verify if it was compromised.
- Check for changes in the network configurations, including indicators of poisoning attacks.
- Monitor closely the actions of the potentially compromised user account for any anomalous behavior.
Variations
NTLM Relay Attack using a sensitive user and a vulnerable package
Synopsis
ATT&CK Tactic |
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ATT&CK Technique |
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Severity |
Medium |
Description
Multiple NTLM authentications were made to the same workstation and sensitive user from different IPs using a vulnerable NTLM package.
This might indicate a potential NTLM Relay attack.
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
- Ensure that the alerted host is not a NAT device or proxy that replicates or forwards network traffic as part of its expected operational behavior.
- Check if the workstation supports weak, outdated versions of NTLM.
- Check for network activity to and from the suspicious IP address and workstation, to verify if they were compromised.
- Check for process activity to and from the suspicious IP address to verify if it was compromised.
- Check for changes in the network configurations, including indicators of poisoning attacks.
- Monitor closely the actions of the potentially compromised user account for any anomalous behavior.
Potential NTLM Relay Attack using a vulnerable package
Synopsis
ATT&CK Tactic |
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ATT&CK Technique |
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Severity |
Low |
Description
Multiple NTLM authentications were made to the same workstation and user from different IPs using a vulnerable NTLM package.
This might indicate a potential NTLM Relay attack.
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
- Ensure that the alerted host is not a NAT device or proxy that replicates or forwards network traffic as part of its expected operational behavior.
- Check if the workstation supports weak, outdated versions of NTLM.
- Check for network activity to and from the suspicious IP address and workstation, to verify if they were compromised.
- Check for process activity to and from the suspicious IP address to verify if it was compromised.
- Check for changes in the network configurations, including indicators of poisoning attacks.
- Monitor closely the actions of the potentially compromised user account for any anomalous behavior.
Potential NTLM Relay Attack using a sensitive user
Synopsis
ATT&CK Tactic |
|
ATT&CK Technique |
|
Severity |
Low |
Description
Multiple NTLM authentications were made to the same workstation and sensitive user from different IPs.
This might indicate a potential NTLM Relay attack.
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
- Ensure that the alerted host is not a NAT device or proxy that replicates or forwards network traffic as part of its expected operational behavior.
- Check if the workstation supports weak, outdated versions of NTLM.
- Check for network activity to and from the suspicious IP address and workstation, to verify if they were compromised.
- Check for process activity to and from the suspicious IP address to verify if it was compromised.
- Check for changes in the network configurations, including indicators of poisoning attacks.
- Monitor closely the actions of the potentially compromised user account for any anomalous behavior.