Javascript+deobfuscator+and+unpacker+portable -

JSDeob-Port is written in 2,800 LOC of modular ES2020. Key modules:

Portability test matrix: | Environment | Pass | Notes | |------------------|------|--------------------------------| | Node.js 18+ | ✅ | Full vm sandbox | | Deno 1.30+ | ✅ | Uses Deno.core.eval polyfill | | Chrome extension | ✅ | Fallback Proxy sandbox | | Firefox add-on | ✅ | Same as Chrome | | Embedded Duktape | ✅ | No DOM, sandbox works |

This report provides an overview of portable JavaScript deobfuscators and unpackers. In the landscape of cybersecurity and web development, analyzing obfuscated code is critical for threat detection and debugging. "Portable" tools—those requiring no installation (standalone executables, HTML/JS applications, or command-line binaries)—offer significant advantages for incident response teams and analysts working on locked-down systems. This report categorizes available tools, evaluates their efficacy, and highlights the best practices for their use.

JSDeob-Port’s portable sandbox is ≈3× faster than headless browser-based tools due to no DOM rendering overhead.

If you want, I can:

To build a "solid" feature for a portable JavaScript deobfuscator and unpacker, you should focus on a multi-layered architectural approach that balances deep static analysis with safe execution. High-performance tools like js-deobfuscator on Rust and established projects like de4js provide a blueprint for these features. Core Feature Set for a Solid Deobfuscator javascript+deobfuscator+and+unpacker+portable

A robust tool must move beyond simple beautification to address structural code transformations.

Static Expression Simplification: Automatically resolve hardcoded logic that obfuscators use to hide intent.

Arithmetic Constant Folding: Simplify complex math like 0x2 * 0x109e + -0xc into its literal result (e.g., 0). Source

String Concatenation: Reconstruct fragmented strings like 'He' + 'll' + 'o' into 'Hello'. Source

Array & String Unpacking: Modern obfuscators store strings in a large, rotated array accessed via a "proxy" function. JSDeob-Port is written in 2,800 LOC of modular ES2020

Reference Replacement: Identify the central string array, reverse any "rotation" logic, and replace all function calls (e.g., _0xabc(12)) with the actual decoded string. Source

Safe Execution via Runtime Sandboxing: For complex decoders that use dynamic logic, use a sandbox (like the V8 Sandbox) to execute string-decoding functions safely without risking your local machine. Source

Proxy Function Inlining: Detect and remove "middle-man" functions that simply return another function call or simple arithmetic, which are designed to break the flow of reading. Source

Convergence Loop: Implement an iterative transformation process that runs until no more changes are detected, ensuring that nested layers of obfuscation are fully peeled back. Source Advanced "Portable" & Professional Features

Since the goal is a portable tool (likely meaning offline, standalone, or lightweight), consider these professional-grade additions: Portability test matrix : | Environment | Pass

Offline Functionality: Ensure the tool works without external API calls, similar to the de4js offline mode.

Identifier Renaming: While original variable names are usually lost, your tool can use "Smart Rename" to guess names based on usage (e.g., renaming _0x1a2b to callback if it's used as one). Source

Support for Multiple Formats: Native support for popular "packers" such as Dean Edward's Packer, JSFuck, JJencode, and AAencode. Source

Control Flow Flattening Removal: (Advanced) Reconstruct the original if/else or switch logic from flattened loops to restore the natural program flow. AI responses may include mistakes. Learn more

For this report, "Portable" is defined by three criteria: