https://hackingpassion.com/tags/file-locking/Recent content in File-Locking on HackingPassion.com : root@HackingPassion.com-[~]HugoenMon, 11 May 2026 14:22:19 +0200https://hackingpassion.com/ghostlock-smb-file-lock-ransomware/Mon, 11 May 2026 14:22:19 +0200https://hackingpassion.com/ghostlock-smb-file-lock-ransomware/<p><strong>GhostLock locks every shared file on any Windows network in minutes using nothing but a standard login, and every security tool watching stays completely silent. This has been possible for over 30 years. Microsoft is not going to patch this.</strong></p> <p>Security researcher Kim Dvash published the proof of concept in May 2026, after discovering the technique during a prior authorized red team engagement.</p> <p><strong>SMB</strong> is the protocol Windows uses to share files across a network. When a program opens a file over SMB, it tells Windows how it wants to share that file with other programs at the same time. Set that sharing mode to zero using a parameter called <code>dwShareMode</code> in the <code>CreateFileW</code> API call, and Windows grants an <strong>exclusive deny-share handle</strong>. While that handle is held open, every other process, user, or system trying to open the same file gets back one thing:</p>