The search looks for files that contain the key word Ryuk under any folder in the C drive, which is consistent with Ryuk propagation.
- Type: TTP
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Last Updated: 2020-11-06
- Author: Rod Soto, Jose Hernandez, Splunk
- ID: 57d44d70-28d9-4ed1-acf5-1c80ae2bbce3
|T1486||Data Encrypted for Impact||Impact|
| tstats `security_content_summariesonly` count min(_time) as firstTime max(_time) as lastTime FROM datamodel=Endpoint.Filesystem WHERE "Filesystem.file_path"=C:\\*Ryuk* BY "Filesystem.dest", "Filesystem.user", "Filesystem.file_path" | `drop_dm_object_name(Filesystem)` | `security_content_ctime(lastTime)` | `security_content_ctime(firstTime)` | `ryuk_test_files_detected_filter`
Associated Analytic Story
How To Implement
You must be ingesting data that records the filesystem activity from your hosts to populate the Endpoint Filesystem data-model object. If you are using Sysmon, you will need a Splunk Universal Forwarder on each endpoint from which you want to collect data.
Kill Chain Phase
Known False Positives
If there are files with this keywoord as file names it might trigger false possitives, please make use of our filters to tune out potential FPs.
|70.0||70||100||A creation of ryuk test file $file_path$ in host $dest$|
source | version: 1