Process Injection: Portable Executable Injection Defense Evasion [Mitre]

Adversaries may inject portable executables (PE) into processes in order to evade process-based defenses as well as possibly elevate privileges. PE injection is a method of executing arbitrary code in the address space of a separate live process.

PE injection is commonly performed by copying code (perhaps without a file on disk) into the virtual address space of the …

Process Injection: Thread Execution Hijacking Defense Evasion [Mitre]

Adversaries may inject malicious code into hijacked processes in order to evade process-based defenses as well as possibly elevate privileges. Thread Execution Hijacking is a method of executing arbitrary code in the address space of a separate live process.

Thread Execution Hijacking is commonly performed by suspending an existing process then unmapping/hollowing its memory, which can then be replaced …

Process Injection: Asynchronous Procedure Call Defense Evasion [Mitre]

Adversaries may inject malicious code into processes via the asynchronous procedure call (APC) queue in order to evade process-based defenses as well as possibly elevate privileges. APC injection is a method of executing arbitrary code in the address space of a separate live process.

APC injection is commonly performed by attaching malicious code to the APC Queue of a …

Process Injection: Thread Local Storage Defense Evasion [Mitre]

Adversaries may inject malicious code into processes via thread local storage (TLS) callbacks in order to evade process-based defenses as well as possibly elevate privileges. TLS callback injection is a method of executing arbitrary code in the address space of a separate live process.

TLS callback injection involves manipulating pointers inside a portable executable (PE) to redirect a process …

Process Injection: Extra Window Memory Injection Defense Evasion [Mitre]

Adversaries may inject malicious code into process via Extra Window Memory (EWM) in order to evade process-based defenses as well as possibly elevate privileges. EWM injection is a method of executing arbitrary code in the address space of a separate live process.

Before creating a window, graphical Windows-based processes must prescribe to or register a windows class, which stipulate …

Process Injection: Process Hollowing Defense Evasion [Mitre]

Adversaries may inject malicious code into suspended and hollowed processes in order to evade process-based defenses. Process hollowing is a method of executing arbitrary code in the address space of a separate live process.

Process hollowing is commonly performed by creating a process in a suspended state then unmapping/hollowing its memory, which can then be replaced with malicious code. …

System Binary Proxy Execution: Mavinject Defense Evasion [Mitre]

Adversaries may abuse mavinject.exe to proxy execution of malicious code. Mavinject.exe is the Microsoft Application Virtualization Injector, a Windows utility that can inject code into external processes as part of Microsoft Application Virtualization (App-V).

Adversaries may abuse mavinject.exe to inject malicious DLLs into running processes (i.e. Dynamic-link Library Injection), allowing for arbitrary code execution (ex. C:\Windows\system32\mavinject.exe PID /INJECTRUNNING PATH_DLL). …

Unloading Module with FreeLibrary Antivirus/EDR Evasion

Malware authors often use various techniques to evade detection by AV/EDR solutions. One such technique involves checking for the presence of AV/EDR DLLs that may be loaded in the malware's address space and attempting to unload them before executing their malicious code.

To do this, the malware first uses the GetModuleHandleA function to retrieve a handle to the DLL, …

DLL Unhooking Antivirus/EDR Evasion

Endpoint Detection and Response (EDR) tools use a technique known as hooking to monitor sensitive system functions within the DLLs of loaded processes. Hooking is a method of live-patching system DLLs, enabling EDRs to intercept the flow of a program and evaluate its legitimacy.

Here's how it works: EDRs modify the first instructions of the functions within the DLLs. …

PowerShell Special Characters Obfuscation Data Obfuscation

PowerShell scripts can be obfuscated using methods that encode commands exclusively with special characters. This technique aims to complicate analysis and potentially evade detection mechanisms.

Attackers frequently employ these tactics to hide the true functionalities of the script, making the analysis more challenging.

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