Whether a scan is GuardDuty-initiated or started on-demand, you can start a new on-demand malware scan on the same Amazon EC2 instance after 1 hour from the start time of the previous malware scan. If the new malware scan gets started within 1 hour of initiation of the previous malware scan, your request will result in the following error, and no scan ID will get generated for this request.
A scan was started on this resource recently. You can request a scan on the same
resource one hour after the previous scan start time.
The steps to re-scan the instance remain the same as starting an on-demand malware scan for the first time. For information about the steps, see Start On-demand malware scan.
To track the status of the malware scans, see Monitoring scan statuses and results in Malware Protection for EC2.
