This analytics are designed to indentify a high frequency of process termination on a machine which is a common behavior of ransomware malware before encrypting files. This technique is designed to avoid an exception error while accessing (docs, images, database and etc..) in the infected machine for encryption.
- Type: Anomaly
- Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- Datamodel: Endpoint
- Last Updated: 2021-03-16
- Author: Teoderick Contreras
- ID: 17cd75b2-8666-11eb-9ab4-acde48001122
|T1486||Data Encrypted for Impact||Impact|
`sysmon` EventCode=5 |bin _time span=3s |stats values(Image) as proc_terminated min(_time) as firstTime max(_time) as lastTime count by Computer EventCode ProcessID | where count >= 15 | `security_content_ctime(firstTime)` | `security_content_ctime(lastTime)` | `high_process_termination_frequency_filter`
Associated Analytic Story
How To Implement
To successfully implement this search, you need to be ingesting logs with the Image (process full path of terminated process) from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.
Kill Chain Phase
Known False Positives
admin or user tool that can terminate multiple process.
|72.0||90||80||High frequency process termination (more than 15 processes within 3s) detected on host $Computer$|
source | version: 1