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Adding _time

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Lou Stella
2022-09-12 12:29:37 -05:00
parent ae92b16c0a
commit 6d1fe61568
1 changed files with 5 additions and 9 deletions
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detections/endpoint/high_process_termination_frequency.yml
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name: High Process Termination Frequency
id: 17cd75b2-8666-11eb-9ab4-acde48001122
version: 1
version: 2
date: '2021-03-16'
author: Teoderick Contreras
type: Anomaly
datamodel:
- Endpoint
description: 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.
description: This analytic is designed to identify a high frequency of process
termination events on a computer in a short period of time, 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.
search: '`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
min(_time) as firstTime max(_time) as lastTime count by _time Computer EventCode ProcessID
| where count >= 15 | `security_content_ctime(firstTime)`| `security_content_ctime(lastTime)`
| `high_process_termination_frequency_filter`'
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.
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.
known_false_positives: admin or user tool that can terminate multiple process.
references:
- https://www.mandiant.com/resources/fin11-email-campaigns-precursor-for-ransomware-data-theft