Stop Log360 UEBA service.
Navigate to <Log360 UEBA installation folder>\ES|lib where <Log360 UEBA installation folder> is the location where Log360 UEBA is installed in your machine.
Take a backup of the files log4j-1.2-api-2.9.1.jar, log4j-api-2.9.1.jar, and log4j-core-2.9.1.jar, and move them to a different folder other than the Log360 UEBA installation folder.
Navigate to <Log360 UEBA installation folder>\lib, take a backup of the file log4j-1.2.15, and move it to a different folder other than the Log360 UEBA installation folder. [Note : This file will be present only from version 4031 to version 4033]
Download the files in this link, extract the contents of the .zip file, and place them in the <Log360 UEBA installation folder>\ES\lib folder.
Start Log360 UEBA service.
Note: As per the latest update from Apache, there is no need to perform the previous workarounds (modifying jvm.options file and wrapper.conf files). Apache has released a .jar file which can mitigate against this vulnerability.