Understanding How Attackers Hide Malware in “Legitimate” Software: A Technical Deep Dive

The Story Begins: Curiosity About Malware After reading about WannaCry . Everyone talks about the vulnerabilities it exploited EternalBlue, SMB flaws, and so on. But what intrigued me more was how malware actually hides itself . How do attackers make malicious code appear like normal software? How do they ensure it runs without raising suspicion? This is the essence of a Trojan a program that appears legitimate but carries hidden payloads. Understanding this behavior is crucial for anyone serious about cybersecurity, because defense starts with understanding offense . So I decided to explore this concept in a controlled, ethical, educational project: building my own Binary Binder . 2. The Educational Goal The goal was to understand the mechanics behind Trojan-style delivery . I wanted to simulate, in a safe environment, what happens when: One executable carries another inside itself The hidden program runs after the visible program starts Execution flow is orchestrated without breaking