Search Evasion Techniques
Names, Techniques, Definitions, Keywords
37 item(s) found so far for this keyword.
Thread execution hijacking is a technique used by malware to evade detection by targeting an existing thread of a process and avoiding any noisy process or thread creation operations. This technique allows the malware to run its code within the context of the targeted thread, without creating new processes or threads, which can be easily detected by security software.
Malware can take advantage of Asynchronous Procedure Calls (APC) to force another thread to execute their custom code by attaching it to the APC Queue of the target thread.
Each thread has a queue of APCs which are waiting for execution upon the target thread entering alterable state.
A thread enters an alert table state if it calls
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 to …
TLS (Thread Local Storage) callbacks are a mechanism in Windows that allows a program to define a function that will be called when a thread is created. These callbacks can be used to perform various tasks, such as initializing thread-specific data or modifying the behavior of the thread.
As an anti-debugging technique, a program can use a TLS callback to …
Suspending threads is a technique used by malware to disable user-mode debuggers and make it more difficult for security analysts to reverse engineer and analyze the code. This can be achieved by using the
SuspendThread function from the kernel32.dll library or the
NtSuspendThread function from the NTDLL.DLL library.
The malware can enumerate the threads of a given process, or search …
DLL Injection Via
LoadLibrary is a technique used by malware to inject its code into a legitimate process. This technique is similar to hook injection, where the malware inserts a malicious DLL to be used by the system. It is one of the most common techniques used to inject malware into another process.
The malware writes the path …
The "Control Signal Handler Callback" technique involves injecting malicious code into a process by using a callback function for control signal handlers. When a control signal, such as Ctrl+C, is received by a process, the system creates a new thread to execute a function to handle the signal. This thread is typically created by the legitimate process "csrss.exe" in the …
Dirty Vanity is a process injection technique that exploits the Windows forking (process reflection and snapshotting) feature to inject code into a new process.
It uses the
NtCreateProcess[Ex] primitives, along with the
PROCESS_DUP_HANDLE flags to reflect and execute code in a new process.
The technique also makes use of various methods, such as …
Misusing Structured Exception Handlers is a technique used by malware to make it more difficult for security analysts to reverse engineer the code. Structured Exception Handlers (SEH) are functions that are used to handle exceptions in a program. These can be misused by malware to fool disassemblers and make it harder to analyze the code. One way this is done …
Killing the Windows Event Log is a technique used by malware to prevent security professionals from detecting and analyzing it. Svchost.exe is a process that manages services on Windows operating systems.
By grouping multiple services into a single process, Svchost.exe conserves computing resources and reduces resource consumption. However, this also means that Svchost.exe manages the Event Log service, which is …