Detection: Disable Net User Account
Description
This analytic will identify a suspicious command-line that disables a user account using the native net.exe or net1.exe utility to Windows. This technique may used by the adversaries to interrupt availability of accounts and continue the impact against the organization.
Annotations
No annotations available.
Implementation
To successfully implement this search, you need to be ingesting logs with the process name, parent process, and command-line executions from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA. Tune and filter known instances where renamed net.exe/net1.exe may be used.
Known False Positives
System administrators or automated scripts may disable an account but not a common practice. Filter as needed.
Associated Analytic Story
Risk Based Analytics (RBA)
| Risk Message | Risk Score | Impact | Confidence |
|---|---|---|---|
| An instance of $parent_process_name$ spawning $process_name$ was identified on endpoint $dest_device_id$ by user $dest_user_id$ attempting to disable accounts. | 49 | 70 | 70 |
The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.
References
Version: 7