Reverse Engineering

A Simple Reverse Engineering of Login Encryption Algorithm

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A Simple Reverse Engineering of Login Encryption Algorithm

1. “Seeing Flowers in the Fog” Error in replaying the login interface: It seems to be related to RSA encryption. Why RSA? Just a feeling~~ “`y9uN67EfI6s5KtHsQSxQ6XDq0MSYnON9XzZmTOXlN3gzGq13%2B5iZ0MmMXLq7ypgoPTr0NN7wnpjHHNbDcfVS/4Eda24Mjf8qgs%2BXX7a470iGyn8oh7S6Ha7QHMIyt9EQ1Oi1KNNSEidngzJB4y/V7jebeXjhaRZNqsPvbQRYSuA%3D“` URL Decoding “`y9uN67EfI6s5KtHsQSxQ6XDq0MSYnON9XzZmTOXlN3gzGq13+5iZ0MmMXLq7ypgoPTr0NN7wnpjHHNbDcfVS/4Eda24Mjf8qgs+XX7a470iGyn8oh7S6Ha7QHMIyt9EQ1Oi1KNNSEidngzJB4y/V7jebeXjhaRZNqsPvbQRYSuA=“` BASE64 Continue Decoding “`˛�#빪ѬA,P鰪Є蜣}_6fL奷x3�虐Ɍ\껊訽:䴞ޘǜփq咿ᝫn�⏗_港H抿(紺²瑐Ԩ娓R'g㲁㯕yxᩖMꃯmXJ“` 2. “Analyzing in Detail” Next, let’s analyze the login logic. Encryption algorithm plugin: http://172.18.252.116:8096/SmartWorkESB/js/jsencrypt.js Login logic: http://172.18.252.116:8096/SmartWorkESB/js/index.js Basically, the client uses the … Read more

Once China Breaks Through in Chip Technology, Prices Will Plummet to “Cabbage” Levels? The Good Days for Western Giants Are Over!

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Once China Breaks Through in Chip Technology, Prices Will Plummet to "Cabbage" Levels? The Good Days for Western Giants Are Over!

Have you ever wondered why a chip the size of a fingernail can sell for more than gold or even diamonds? In the current technological environment, chips are the food of modern industry and the scepter of great power competition. NVIDIA’s graphics cards have skyrocketed in price, and the costs of high-end manufacturing processes are … Read more

Complete Reproduction and In-Depth Analysis of ASM Crypto Encryption Algorithm

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RCTF 2021 – Complete Reproduction and In-Depth Analysis of ASM Crypto Encryption Algorithm Introduction This article is a complete technical reproduction of the ASM Crypto problem from RCTF 2021. The problem provides an encryption program written in x86 assembly and the encrypted ciphertext, requiring reverse analysis to restore the plaintext. This article will adopt the … Read more

Operation Triangulation: The Last (Hardware) Mystery

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Operation Triangulation: The Last (Hardware) Mystery

Disclaimer:The programs (methods) mentioned in this article may be offensive and are intended for security research and educational purposes only. Readers assume all legal and joint responsibilities for any other use of this information; the author of the article bears no legal or joint responsibility. This article was first published on the author’s personal blog:https://mybeibei.net, … Read more

Reverse Engineering of the msToken Parameter: A Complete Analysis of the JS Encryption Algorithm

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Reverse Engineering of the msToken Parameter: A Complete Analysis of the JS Encryption Algorithm

Brothers, last time we detailed the reverse engineering process of a certain headline’s a_bogus parameter, today we will tackle another key parameter—msToken. This parameter also plays an important role in the /api/pc/list/feed interface, dynamically changing with each request, and is a crucial part of the anti-scraping mechanism. 🧩 Core Analysis Approach Through packet analysis, we … Read more

Imitation in Embedded Hardware Projects: Five Core Considerations

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Imitation in Embedded Hardware Projects: Five Core Considerations

In embedded hardware development, the boundary between imitation and plagiarism often leads to disputes due to ambiguous technical details. This article reveals five key considerations to help you avoid legal risks and achieve legitimate technical borrowing. 1. Legal Risk Prevention: Subject Qualification and Evidence Chain Procurement Compliance: Ensure that the imitated object is legally obtained … Read more

GnuRadio Hacking: Using GnuRadio and SDR to Crack Fixed-Code Wireless Remote

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GnuRadio Hacking: Using GnuRadio and SDR to Crack Fixed-Code Wireless Remote

*Author:Xue Bi 0xroot @ Vulnerability Box Security Team 0×01 Signal Capture In this article, we will demonstrate a wireless replay attack on a wireless egg vibrator of a certain brand model using GnuRadio and SDR hardware. The common frequency bands for wireless remotes in the market typically operate at 315MHz, 433MHz, and a few may … Read more

Implementation of Assembly Instruction Obfuscator

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Previously, I encountered many obfuscation techniques such as junk instructions, instruction bloat, and virtual machines while unpacking. I wanted to try creating a similar obfuscator. Thus, the idea of writing an instruction obfuscator came to mind. Initially, I intended to write an obfuscator that directly obfuscates and expands opcodes, which is quite challenging. This includes … Read more

Anti-Decompilation Techniques Analysis

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Anti-Decompilation Techniques Analysis

In this experiment, we will analyze a specially prepared binary file (non-malicious), which employs various anti-decompilation techniques. First, open antidisasm.exe using IDA: You can see a set of function calls here, each using different anti-decompilation techniques, storing the return values in the eax register. The task is to find out the return value of each … Read more