what is vidar-stealer-reverse-engineering fr?

This repository is a written analysis of Vidar Stealer 2.0, a piece of information-stealing malware, based on reverse engineering work. It is documentation, not a tool you run: the author took the malware apart and wrote up what they found so that security researchers and defenders can understand how it behaves. The analysis focuses on three main techniques the malware uses to avoid detection. First, it tampers with the Windows Task Scheduler by changing the timestamps on existing system tasks, in one case setting a date all the way back to 1999, which is a classic trick to confuse anyone reviewing logs during a forensic investigation. Second, it uses a technique called process hollowing against Explorer.exe, the normal Windows file browser process: it starts a suspended copy of Explorer, replaces its memory with its own malicious code, and then runs that code from inside a process that looks completely legitimate to security tools. Third, and more unusual, the malware was found injecting itself into the Microsoft Copilot process, a newer built in Windows AI assistant, using a similar injection approach so it can hide inside another trusted process. The author examined the injected code using WinDbg, a Windows debugging tool, and found memory regions with unusual permissions, obfuscated instructions, and calls to functions like LoadLibrary and MultiByteToWideChar, the kind of functions malware commonly uses to load extra code and prepare stolen data for exfiltration. The write-up walks through each finding with screenshots of the debugger output and explains what the patterns mean. The repository links to a copy of the analyzed malware sample hosted on MalwareBazaar, a public database used by security researchers, for anyone who wants to reproduce the analysis themselves. This is an educational deep dive meant to help defenders recognize these evasion techniques, rather than a working tool or piece of software you would install and run.