Search Evasion Techniques
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API Obfuscation Anti-Disassembly
API obfuscation is a technique used by malware to make it more difficult for security analysts to understand and analyze the code. This is typically done by using a technique called API hashing, which replaces the names of API functions with a hashed value. When an analyst runs the malware through a disassembler tool, the hashed values are printed instead …
Obfuscated Files or Information: Dynamic API Resolution Defense Evasion [Mitre]
Adversaries may obfuscate then dynamically resolve API functions called by their malware in order to conceal malicious functionalities and impair defensive analysis. Malware commonly uses various Native API functions provided by the OS to perform various tasks such as those involving processes, files, and other system artifacts.
API functions called by malware may leave static artifacts such as strings …
Hell's Gate Antivirus/EDR Evasion
The Hell's Gate technique refers to a specific method used by malware authors to make their software more difficult to detect and analyze. The technique involves the use of a custom native API resolver to resolve Windows API functions at runtime dynamically.
By using Hell's Gate, malware can avoid referencing the Windows API functions directly in the Import Address …