Fileless malware attacks have become more prevalent since 2017 thanks to the creation of attack kits that integrate calls to PowerShell. These kits are virus creation environments.
Attackers are increasingly adapting to this method of defense by employing what is called a fileless attack, also known as a zero-footprint attack or non-malware attack.
??? pgHead ???Fileless Malware: How It WorksWindows tools exploited by fileless malware or LOTL attacksHere is an outline of how a fileless malware attack is carried out.

Skip to SectionWhat Is Fileless Malware and Why Its So Hard to See on cPanelHow Fileless Attacks Actually Hit cPanel-Managed Websites and Systems
Fileless malware uses legitimate tools or applications to install malware and launch a cyber attack on an organisation or single user.

How to Prevent Fileless Malware Attacks. Set PowerShell script policies and use best practices: PowerShells execution policy should be set to RemoteSigned or AllSigned to take...
Fileless malware relies on legitimate software components to launch an attack. In fact, it may disguise itself as actual signature-based antivirus and intrusion detection tools.