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Obfuscated Files or Information: Software Packing
![Defense Evasion [Mitre] icon](/media/2024/04/08/icons8-burglar.svg){kind=small}
Adversaries may perform software packing or virtual machine software protection to conceal their code. Software packing is a method of compressing or encrypting an executable. Packing an executable changes the file signature in an attempt to avoid signature-based detection. Most decompression techniques decompress the executable code in memory. Virtual machine software protection translates an executable's original code into a special …
Read moreConstant Blinding
Constant blinding can be employed by malware authors to obfuscate their malicious code, making it harder for security researchers and antivirus software to detect and analyze the malware. By using constant blinding techniques, the malware code can be concealed, increasing its chances of evading detection and maintaining persistence on the target system.
Here's how constant blinding can be utilized …
Read moreRegister Reassignment
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 …
Read moreXProtect Encryption Abuse
Malware can abuse Apple's macOS XProtect string encryption algorithm to hide critical strings, including commands, browser paths, extension IDs, cryptocurrency wallet locations, and command-and-control (C2) details.
This technique leverages the same XOR-based encryption logic implemented in macOS’s XProtect antivirus engine, this encryption is used for “encrypted YARA rules stored within the XProtect Remediator binaries”.
The encryption process involves …
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