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binfmt_misc (Miscellaneous Binary Format) is a capability of the Linux kernel which allows arbitrary executable file formats to be recognized and passed to certain user space applications, such as emulators and virtual machines. [1] It is one of a number of binary format handlers in the kernel that are involved in preparing a user-space program ...
It then uses the system C compiler to compile the source shell script and build a stripped binary which behaves exactly like the original script. Upon execution, the compiled binary will decrypt and execute the code with the shells'-c option. [2]
An ELF file has two views: the program header shows the segments used at run time, whereas the section header lists the set of sections.. In computing, the Executable and Linkable Format [2] (ELF, formerly named Extensible Linking Format) is a common standard file format for executable files, object code, shared libraries, and core dumps.
In addition to the binary application code, the executables may contain headers and tables with relocation and fixup information as well as various kinds of meta data. Among those formats listed, the ones in most common use are PE (on Microsoft Windows), ELF (on Linux and most other versions of Unix), Mach-O (on macOS and iOS) and MZ (on DOS).
UPX uses a data compression algorithm called UCL, [5] which is an open-source implementation of portions of the proprietary NRV (Not Really Vanished) [6] algorithm. [2]UCL has been designed to be simple enough that a decompressor can be implemented in just a few hundred bytes of code.
Linux distribution-agnostic Deb: Debian and its derivatives, such as Raspberry Pi OS, Kali Linux, Ubuntu, and Linux Mint [5] ebuild: Gentoo Linux [6] eopkg: Solus [7] Nixpkg: Nix, NixOS, Home Manager Portage: Gentoo Linux, ChromeOS [8] Flatpak: Linux distribution-agnostic .app, .hap: HarmonyOS, OpenHarmony, Oniro OS and Linux based Unity ...
Debian packages are used in distributions based on Debian, such as, Linux Mint (LMDE), [28] [29] KDE neon, Ubuntu and many others. Fink, a port of dpkg and APT to macOS, uses deb packages. [30] [31] Nexenta OS, a discontinued OS based on OpenSolaris, included Debian package management software and the use of deb packages.
Executable compression can be used to prevent direct disassembly, mask string literals and modify signatures. Although this does not eliminate the chance of reverse engineering, it can make the process more costly. A compressed executable requires less storage space in the file system, thus less time to transfer data from the file system into ...