Search Evasion Techniques
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AppInit DLL Injection Process Manipulating Defense Evasion [Mitre]
Any Dynamic Link Libraries (DLL) that are specified within the AppInit_DLLs registry key values are loaded by user32.dll into any process that utilizes user32.dll. So by modifying the AppInit_DLLs registry key value and pointing it to a malicious DLL, an attacker can force the system to load their DLL into every process that utilizes user32.dll and force it to execute …
bochs CPU oversights evasion Sandbox Evasion
bochs has multiple oversights in its CPU emulation, which allows us to detect if we're running in a bochs emulator:
bochs may have invalid CPU brands that don't exist.
- For AMD CPUs, the "p" in "processor" should be in capital, which bochs doesn't implement.
- AMD CPUs have easter eggs for their K7 and K8 CPUs ("IT'S …
Hook Injection Process Manipulating
Hook injection is a technique used by malware to alter the behavior of internal functions in an operating system or application. This is typically achieved by inserting malicious code into existing function calls, allowing the malware to intercept and manipulate the normal flow of execution.
In the case of Windows, the SetWindowsHookEx function can be used by programs to …
Injection using Shims Process Manipulating
Microsoft provides Shims to developers mainly for backward compatibility. Shims allow developers to apply fixes to their programs without the need of rewriting code. By leveraging shims, developers can tell the operating system how to handle their application. Shims are essentially a way of hooking into APIs and targeting specific executables. Malware can take advantage of shims to target an …
Debug Registers, Hardware Breakpoints Anti-Debugging
Registers DR0 through DR3 contain the linear address associated with one of the four hardware breakpoint conditions. For anti-debugging, malware will check the contents of the first four debug registers to see if the hardware breakpoint has been set.