Search Evasion Techniques

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Code Transposition Anti-Disassembly

Code transposition is a technique used by malware authors to evade detection and analysis by rearranging the instructions of a piece of code without changing its behavior. This technique is used to make the code more difficult to read and understand for disassemblers and reverse engineers, as well as to hide the true intent of the code.

There are …

Opaque Predicate Anti-Disassembly

Opaque predicate is a term used in programming to refer to decision making where there is only one possible outcome. This can be achieved through the use of complex or hard-to-understand logic, such as calculating a value that will always return True.

Opaque predicates are often used as anti-disassembling techniques, as they can make it difficult for an analyst …

Inserting Garbage Bytes Anti-Disassembly

Garbage bytes are random or meaningless data that is inserted into a program's code in order to make reverse engineering and analysis more difficult. This is an anti-disassembling technique, as the insertion of these random bytes can cause disassemblers to misinterpret the code and produce incorrect disassembly results.

The insertion of garbage bytes is usually used in conjunction with …

Register Reassignment Anti-Disassembly

Register reassignment is a technique used in code obfuscation and anti-disassembling to make reverse engineering and analysis more difficult. It involves modifying the instructions in a program to use different registers in different versions or instances of the program. This can make it more difficult for a reverse engineer or disassembler to understand the program's behavior, as the register assignments …