Radare2 vs Scalpel vs Hydra vs Shellter: Which Satellite tool is Best in 2025?

Radare2 is an open-source, modular reverse engineering framework, pre-installed on Kali Linux at /usr/bin/r2, designed for analyzing binaries, disassembling code, and debugging software across multiple platforms. Initiated by Sergi Alvarez (pancake) in 2006, Radare2 offers a suite of command-line tools, a graphical interface (Cutter), and scripting APIs for tasks like malware analysis, firmware auditing, and exploit development. Supporting architectures such as x86, ARM, MIPS, and WebAssembly, it’s a favorite among cybersecurity researchers, ethical hackers, and CTF enthusiasts for its lightweight design and extensibility.

Scalpel is an open-source, high-performance file carving utility pre-installed on Kali Linux at /usr/bin/scalpel, designed for recovering deleted or hidden files from disk images and raw block devices. Developed by Golden G. Richard III as an enhanced rewrite of Foremost 0.69, Scalpel leverages header and footer signatures to extract files, bypassing file system metadata. Supporting formats like JPEG, PDF, MP3, and DOC, it’s a critical tool for digital forensic investigators, incident responders, and ethical hackers conducting cyber forensic investigations and file recovery. Scalpel’s multithreading, GPU acceleration, and regular expression support make it exceptionally fast and versatile.

Hydra is a leading open-source password cracker pre-installed in Kali Linux (version 9.5), tailored for penetration testers and security professionals. This brute-force password-cracking tool for cybersecurity targets over 50 network protocols, making it a premier network login cracker for ethical hacking. With a 956 KB footprint and tools like pw-inspector, Hydra streamlines credential attacks, empowering testers to identify weak passwords and secure systems effectively.

Shellter is an open-source dynamic shellcode injection tool, pre-installed on Kali Linux, designed for injecting malicious code into 32-bit Windows portable executable (PE) files while evading antivirus detection. Known as a dynamic PE infector, Shellter, developed by kyREcon, allows penetration testers and red teamers to embed custom or Metasploit-generated shellcode into legitimate Windows applications without altering suspicious file attributes. Its Stealth Mode preserves the original functionality of infected executables, making it ideal for ethical hacking and security assessments.