Cybersecurity

SQL injection remains one of the most dangerous web application vulnerabilities, responsible for 33% of all web breaches in 2023. This comprehensive guide explains how these attacks work, their real-world impact, and effective defense strategies for developers and security professionals. 1. Understanding SQL Injection Attacks 1.1 What is SQL Injection? SQL injection occurs when attackers exploit improper input sanitization to inject malicious SQL code into database queries. This vulnerability allows attackers to: ...

Reverse Engineering Malicious Binaries Step 1: Initial Triage Load suspect .dll/.exe into dnSpy Use Assembly Explorer to identify: Suspicious imports (e.g., System.IO.Compression for packed payloads) Obfuscation markers (ConfuserEx, Eazfuscator strings) Embedded resources (malicious scripts) Step 2: Deobfuscation Workflow // Before deobfuscation public string Decode(string input) { return Encoding.UTF8.GetString(Convert.FromBase64String(input).Reverse().ToArray()); } // After using dnSpy's "Simplify" feature: public string Decode(string input) => "FLARE-ON_2023"; // Revealed C2 domain Techniques: Right-click → Analyze to detect crypto routines Ctrl+Shift+R to rename obfuscated variables Export decrypted resources via Save Code Debugging for Vulnerability Research Exploiting Logic Flaws Set breakpoints at authentication methods Modify return values in Debug > Windows > Immediate: // Change authentication result ? isAdmin = true // Bypasses access checks Trace insecure deserialization paths (e.g., BinaryFormatter usage) Extracting Secrets Use Memory Window during execution to: Dump RSA private keys from CSP containers Capture DPAPI-protected credentials Extract hardcoded API tokens Binary Patching for Exploit Development Scenario: Craft PoC for license check bypass ...