Search Evasion Techniques
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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 …
FLIRT Signatures Evasion Anti-Disassembly
FLIRT Signature evasion is a technique used by malware to hide malicious code inside legitimate functions from known libraries. FLIRT (Fast Library Identification and Recognition Technology) is a database that contains signature patterns for identifying known functions from legitimate libraries.
Malware authors can abuse these signatures by modifying or adding specific bytes to the code, so that it appears …
Obfuscated Files or Information: Indicator Removal from Tools Defense Evasion [Mitre]
Adversaries may remove indicators from tools if they believe their malicious tool was detected, quarantined, or otherwise curtailed. They can modify the tool by removing the indicator and using the updated version that is no longer detected by the target's defensive systems or subsequent targets that may use similar systems.
A good example of this is when malware is …