Title

Systems must be monitored for attempts to use local accounts to log on remotely from other systems. (Cat II impact)

Discussion

Monitoring for the use of local accounts to log on remotely from other systems may indicate attempted lateral movement in a Pass-the-Hash attack.

Check Content

Verify attempts to use local accounts to log on remotely from other systems are being monitored. Event monitoring may be implemented through various methods including log aggregation and the use of monitoring tools. Monitor for the events listed below. If these events are not monitored, this is a finding. More advanced filtering is necessary to obtain the pertinent information than just looking for event IDs. Search for the event IDs listed with the following additional attributes: Logon Type = 3 (Network) Authentication Package Name = NTLM Not a domain logon and not the ANONYMOUS LOGON account Successful User Account Login (Subcategory: Logon) 4624 - An account was successfully logged on. Failed User Account Login (Subcategory: Logon) 4625 - An account failed to log on.

Fix Text

Monitor for attempts to use local accounts to log on remotely from other systems. Event monitoring may be implemented through various methods including log aggregation and the use of monitoring tools. Monitor for the events listed below. More advanced filtering is necessary to obtain the pertinent information than just looking for event IDs. Search for the event IDs listed with the following additional attributes: Logon Type = 3 (Network) Authentication Package Name = NTLM Not a domain logon and not the ANONYMOUS LOGON account Successful User Account Login (Subcategory: Logon) 4624 - An account was successfully logged on. Failed User Account Login (Subcategory: Logon) 4625 - An account failed to log on. The "Pass the Hash Detection" section of NSA's "Spotting the Adversary with Windows Event Log Monitoring" provides a sample query for filtering. https://www.iad.gov/iad/library/reports/spotting-the-adversary-with-windows-event-log-monitoring.cfm.

Additional Identifiers

Rule ID: SV-243491r723508_rule

Vulnerability ID: V-243491

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.