Adversaries may attempt to hide artifacts associated with their behaviors to evade detection. Operating systems may have features to hide various artifacts, such as important system files and administrative task execution, to avoid disrupting user work environments and prevent users from changing files or features on the system. Adversaries may abuse these features to hide artifacts such as files, directories, user accounts, or other system activity to evade detection.(Citation: Sofacy Komplex Trojan)(Citation: Cybereason OSX Pirrit)(Citation: MalwareBytes ADS July 2015)

Adversaries may also attempt to hide artifacts associated with malicious behavior by creating computing regions that are isolated from common security instrumentation, such as through the use of virtualization technology.(Citation: Sophos Ragnar May 2020)
Hide Artifacts
source_name: mitre-attack  url: https://attack.mitre.org/techniques/T1564  external_id: T1564     source_name: Cybereason OSX Pirrit  description: Amit Serper. (2016). Cybereason Lab Analysis OSX.Pirrit. Retrieved December 10, 2021.  url: https://cdn2.hubspot.net/hubfs/3354902/Content%20PDFs/Cybereason-Lab-Analysis-OSX-Pirrit-4-6-16.pdf     source_name: MalwareBytes ADS July 2015  description: Arntz, P. (2015, July 22). Introduction to Alternate Data Streams. Retrieved March 21, 2018.  url: https://blog.malwarebytes.com/101/2015/07/introduction-to-alternate-data-streams/     source_name: Sofacy Komplex Trojan  description: Dani Creus, Tyler Halfpop, Robert Falcone. (2016, September 26). Sofacy's 'Komplex' OS X Trojan. Retrieved July 8, 2017.  url: https://researchcenter.paloaltonetworks.com/2016/09/unit42-sofacys-komplex-os-x-trojan/     source_name: Sophos Ragnar May 2020  description: SophosLabs. (2020, May 21). Ragnar Locker ransomware deploys virtual machine to dodge security. Retrieved June 29, 2020.  url: https://news.sophos.com/en-us/2020/05/21/ragnar-locker-ransomware-deploys-virtual-machine-to-dodge-security/     