Search Evasion Techniques
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Querying the I/O Communication Port Sandbox Evasion
VMware uses virtual I/O ports for communication between the virtual machine and the host operating system to support functionality like copy and paste between the two systems. The port can be queried and compared with a magic number VMXh to identify the use of VMware.
Dynamically Computed Target Address Anti-Disassembly
Dynamically computed target addresses is an anti-disassembling technique that involves using dynamically computed addresses as the targets of branch instructions in a program. This can make it difficult for a disassembler to accurately reconstruct the original instructions of the program, as the disassembler will not be able to determine the correct target addresses for the branch instructions without actually executing …
COM Hijacking Process Manipulating
COM hijacking is a technique used by adversaries to insert malicious code into the Windows operating system through the Microsoft Component Object Model (COM).
COM is a system that allows software components to interact with each other, and adversaries can abuse this system to execute their own code in place of legitimate software. To achieve this, they alter references …
PECompact Packers
PECompact is a Windows executable compressor. It has a plugin system that offers virtually customization.
.Net Anti-Decompiler Packers
.Net Anti-Decompiler is a protective tool for .Net assemblies. It provides an extra layer of security and compliance to .Net application from reverse engineering.
Impair Defenses: Impair Command History Logging Defense Evasion [Mitre]
Adversaries may impair command history logging to hide commands they run on a compromised system. Various command interpreters keep track of the commands users type in their terminal so that users can retrace what they've done.
Indicator Removal: Clear Command History Defense Evasion [Mitre]
In addition to clearing system logs, an adversary may clear the command history of a compromised account to conceal the actions undertaken during an intrusion. Various command interpreters keep track of the commands users type in their terminal so that users can retrace what they've done.
On Windows hosts, PowerShell has two different command history providers: the built-in history …
Indirect Command Execution Defense Evasion [Mitre]
Adversaries may abuse utilities that allow for command execution to bypass security restrictions that limit the use of command-line interpreters. Various Windows utilities may be used to execute commands, possibly without invoking cmd.
Adversaries may abuse these features for Defense Evasion, specifically to perform arbitrary execution while subverting detections and/or mitigation controls (such as Group Policy) that limit/prevent the …
Obfuscated Files or Information: Compile After Delivery Defense Evasion [Mitre]
Adversaries may attempt to make payloads difficult to discover and analyze by delivering files to victims as uncompiled code. Text-based source code files may subvert analysis and scrutiny from protections targeting executables/binaries. These payloads will need to be compiled before execution; typically via native utilities such as csc.exe or GCC/MinGW.
Source code payloads may also be encrypted, encoded, and/or …
Pre-OS Boot: Component Firmware Defense Evasion [Mitre]
Adversaries may modify component firmware to persist on systems. Some adversaries may employ sophisticated means to compromise computer components and install malicious firmware that will execute adversary code outside of the operating system and main system firmware or BIOS. This technique may be similar to System Firmware but conducted upon other system components/devices that may not have the same capability …