Advanced malware continues to play a significant role in many attacks targeting organizations today. Malware authors continue to develop new techniques that bypass both traditional and “next-generation” security tools, like firewalls, IPS, and sandbox technologies, leaving your systems and data at risk. Evasive malware can easily escape detection by “advanced” security technologies by altering its behavior or adopting one or more evasion tactics.
Malware authors easily alter the signature of their code to avoid detection. Because security tools examine the internal components of an object to generate a signature, modifying even a single bit in any of the malware’s components changes the object’s signature. Some of the malware tools on the dark web enable payload-changing capabilities with a simple check box to foil signature-based systems.
Advanced malware is engineered specifically to detect when it is running in most sandboxes on the market. The malware avoids taking any malicious actions to evade detection while in the sandbox, allowing it to enter your network and initiate its malicious behavior. The reason why advanced malware can bypass most sandboxes is that they typically utilize virtual machine (VM) environments. VM technologies insert artifacts, which allow advanced malware to discover that it is running in a virtual environment. These artifacts include additional operating system files and processes, supplementary CPU features, and other components necessary for the virtualization to work.
Advanced Malware Evasion Techniques – Advanced malware also avoids detection by sandboxes or other security controls by altering its behavior and adopting one or more of the following evasion tactics:
The malware simply does nothing for an extended period. Typically, 10 minutes is sufficient for most sandboxes to timeout and assume the object is benign.
The malware splits into several components that only execute when it is reassembled.
The malware hides malicious code in the lower layers of the operating system where conventional sandbox technology can’t see it.
The malware postpones these malicious actions while it is operating within a sandbox:
The malware avoids doing anything malicious until a user performs a specific action (e.g., a mouse click, pressing a key, opening or closing a file, or exiting the program).
Return-Oriented Programming (ROP) is when malware injects functionality into another process without altering the code of that process. This is achieved by modifying the contents of the stack, which is the set of memory addresses that tell the system which segment of code to execute next.
Another advancement criminals have made is malware that doesn’t reside in a file. What makes fileless malware detection so challenging is that these threats reside entirely in memory and remain hidden from most advanced malware detection tools. The most sophisticated versions of fileless malware also are able to completely disappear after reaching their objectives. By operating in such a way that nothing is ever written to disk, and then wiping themselves from memory when done, this ultra-evasive type of malware is extremely difficult to detect.
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Lastline Defender™ detects advanced malware that can easily evade sandboxes and other advancedsecurity controls. These products can only monitor the interaction between an object and the operating system, which significantly limits their visibility into malicious behavior. This means they cannot see what is occurring within the malware itself, nor in other programs, operating system, or kernel functions.
Lastline’s Deep Content Inspection™ technology imitates a complete operating system and hardware environment.This enables 100 percent visibility into the malware, all programs and services it invokes, all operating system functions, and all kernel activity. It analyzes the actions of everything that occurs, including all CPU instructions, memory locations accessed, devices used, and network connections.
This visibility means malware can’t execute a behavior that we can’t see. Deep Content Inspection enables Lastline to detect malware actions that other technologies miss, such as:
In addition, Lastline Defender:
Learn More –Watch our webinar on how to protect your network from Malware that’s designed to evade detection.
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