Fileless malware is a type of malicious procedure that executes cyber-attacks using native tools built into the system. Because fileless malware does not require the attacker to install any malware programs on the target machine, it is difficult to detect. Simply keeping your software up to date is one way to protect against file-less infections.
An integrated approach that addresses the entire threat lifecycle is the real key to successfully countering file-less attacks. You gain an advantage over attackers by being able to investigate every phase of a campaign before, during, and after an attack if you have a multi-layered defense. There are several types of fileless malware, which are listed below.
Reflective Self-Injection:
Reflective loading is the process of loading a portable executable from memory rather than from a disc. A well-crafted function/script can load a portable executable without being registered as a loaded module in the process, allowing it to perform actions without leaving traces. PowerShell is one of the most commonly used applications for running these custom scripts.
Reflective EXE Self Injection:
Reflective loading refers to loading a power shell from memory rather than from disk. A crafted function can reflectively load an executable without getting registered as a loaded module in the process and hence can perform actions without leaving footprints. PowerShell is one of the most widely used applications to execute these crafted scripts.
Reflective DLL Remote Injection:
Reflective loading is when a power shell is loaded from memory rather than from the disc. A well-crafted function/script can load a DLL without being registered as a loaded module in the process, allowing it to perform actions without leaving traces. This is a lifeless attack in which a PowerShell script attempted to inject a DLL into a remote process.
Fileless Threat:
Malicious code execution via the DotNetToJScript procedure is a lifeless threat. This event denotes an attempt to execute malicious shellcode, which is commonly used in file-less attacks. DotNetToJScript attack vectors enable the loading and execution of malicious.NET assemblies directly from memory using.NET libraries exposed via COM.
|DataNudge 