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Inline Hooking
Inline hooking is a technique used to intercept calls to target functions. It is commonly used by antiviruses, sandboxes, and malware to perform a variety of tasks, such as checking parameters, shimming, logging, spoofing returned data, and filtering calls.
The process of inline hooking involves directly modifying the code within the target function, usually by overwriting the first few …
Read moreDNS API Injection
DNS API injection is a technique used by malware to evade detection by intercepting and modifying DNS (Domain Name System) requests made by a host system. The technique involves injecting code into the DNS API (Application Programming Interface) of the host system, which is a set of functions and protocols that allow communication with the DNS service. By injecting code …
Read moreProcess Herpaderping
Process Herpaderping is a method of obscuring the intentions of a process by modifying the content on a disk after the image has been mapped. This results in curious behavior by security products and the OS itself.
To abuse this convention, we first write a binary to a target file on a disk. Then, we map an image of …
Read moreProcess Ghosting
Process Ghosting is a technique used to bypass detection by manipulating the executable image when a process is loaded.
Windows attempts to prevent mapped executables from being modified. Once a file is mapped into an image section, attempts to open it with FILE_WRITE_DATA (to modify it) will fail with ERROR_SHARING_VIOLATION. Deletion attempts via FILE_DELETE_ON_CLOSE/FILE_FLAG_DELETE_ON_CLOSE fail with …
Volume Shadow Copy Service (VSC,VSS) Deletion
![Defense Evasion [Mitre] icon](/media/2024/04/08/icons8-burglar.svg){kind=small}
Deleting Volume Shadow Copy makes the forensic investigation more difficult in terms of the recovery of previous artifact evidence. In addition, attackers using ransomware often delete VSCs not to be able to recover the original files of the encrypted files from VSCs.
On the other hand, deleting by using vssadmin and WMIC is on a file system level, the …
Read moreDisabling Event Tracing for Windows (ETW)
Many EDR solutions leverage Event Tracing for Windows (ETW) extensively. ETW allows for extensive instrumentation and tracing of a process functionality and WINAPI calls. It has components in the kernel, to register callbacks for system calls and other kernel operations, but also consists of a userland component that is part of ntdll.dll.
Since ntdll.dll is a DLL loaded into …
Read moreProcEnvInjection - Remote code injection by abusing process environment strings
This method allows to inject custom code into a remote process without using WriteProcessMemory - It will use the lpEnvironment parameter in CreateProcess to copy the code into the target process. This technique can be used to load a DLL into a remote process, or simply execute a block of code.
The lpEnvironment parameter in CreateProcess allows us to …
Shellcode Injection via CreateThreadpoolWait
Shellcode injection is a technique used by malware to execute arbitrary code within the context of a targeted process. One method of achieving this is through the use of the CreateThreadpoolWait function, which is a part of the Windows thread pool API.
In the context of shellcode injection, CreateThreadpoolWait is used to create a wait object that is associated …
BobSoft Mini Delphi Packer
The Delphi programming language can be an easy way to write applications and programs that leverage Windows API functions. In fact, some actors deliberately include the default libraries as a diversion to hamper static analysis and make the application "look legit" during dynamic analysis.
The packer goes to great lengths to ensure that it is not running in an …
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