A request was made to enable a hardware device.
Re-enabling disabled devices. Attacker may re-enable a previously disabled USB port to exfiltrate data.
Alert: re-enabling of devices previously disabled by policy.
SubjectUserNameTargetUserNameLogonTypeIpAddressWorkstationName Starting points — adapt the log source, projected fields and thresholds for your environment.
SecurityEvent
| where EventID == 6421 // A request was made to enable a device
| project TimeGenerated, Computer, SubjectUserName, TargetUserName, LogonType, IpAddress, WorkstationName
| sort by TimeGenerated descindex=* sourcetype="WinEventLog:Security" EventCode=6421
| stats count earliest(_time) as first_seen latest(_time) as last_seen by ComputerName
| sort - count `# A request was made to enable a device — add EventData fields: SubjectUserName, TargetUserName, LogonType, IpAddress`A request was made to enable a device. A request was made to enable a hardware device.
Event 6421 is written to the Security channel by Microsoft-Windows-Security-Auditing. Advanced Audit Policy — enable the 'Plug and Play' subcategory (Success and/or Failure).
Alert: re-enabling of devices previously disabled by policy.