Search Evasion Techniques
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Impair Defenses: Disable or Modify Tools Defense Evasion [Mitre]
Adversaries may modify and/or disable security tools to avoid possible detection of their malware/tools and activities. This may take many forms, such as killing security software processes or services, modifying / deleting Registry keys or configuration files so that tools do not operate properly, or other methods to interfere with security tools scanning or reporting information. Adversaries may also disable …
Impair Defenses: Safe Mode Boot Defense Evasion [Mitre]
Adversaries may abuse Windows safe mode to disable endpoint defenses. Safe mode starts up the Windows operating system with a limited set of drivers and services. Third-party security software such as endpoint detection and response (EDR) tools may not start after booting Windows in safe mode. There are two versions of safe mode: Safe Mode and Safe Mode with Networking. …
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, …