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Description

The following analytic detects the installation of the XMRIG coinminer driver on a system. It identifies the loading of the WinRing0x64.sys driver, commonly associated with XMRIG, by analyzing Sysmon EventCode 6 logs for specific signatures and image loads. This activity is significant because XMRIG is an open-source CPU miner frequently exploited by adversaries to mine cryptocurrency illicitly. If confirmed malicious, this activity could lead to unauthorized resource consumption, degraded system performance, and potential financial loss due to unauthorized cryptocurrency mining.

  • Type: TTP

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2024-05-06
  • Author: Teoderick Contreras, Splunk
  • ID: 90080fa6-a8df-11eb-91e4-acde48001122

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1543.003 Windows Service Persistence, Privilege Escalation
T1543 Create or Modify System Process Persistence, Privilege Escalation
Kill Chain Phase
  • Installation
  • Exploitation
NIST
  • DE.CM
CIS20
  • CIS 10
CVE 


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`sysmon` EventCode=6 Signature="Noriyuki MIYAZAKI" OR ImageLoaded= "*\\WinRing0x64.sys" 
|  stats  min(_time) as firstTime max(_time) as lastTime count by  dest ImageLoaded Hashes IMPHASH Signature Signed 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `xmrig_driver_loaded_filter`

Macros

The SPL above uses the following Macros:

:information_source: xmrig_driver_loaded_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • _time
  • dest
  • ImageLoaded
  • Hashes
  • IMPHASH
  • Signature
  • Signed

How To Implement

To successfully implement this search, you need to be ingesting logs with the driver loaded and Signature from your endpoints. If you are using Sysmon, you must have at least version 6.0.4 of the Sysmon TA.

Known False Positives

False positives should be limited.

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
80.0 80 100 A driver $ImageLoaded$ related to xmrig crytominer loaded in host $dest$

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

source | version: 2