No installer. No readme. Just a single executable with an icon that looked like a radar screen from a 1980s submarine movie. Elias double-clicked it.
Next to an entry labeled BACKUP-ARCHIVE was an amber dot. He clicked it. A tooltip appeared: "Shadow session available. Credentials: cached." MyLanViewer 4.14.1 Portable
He minimized MyLanViewer and checked the timestamp of the camera feed. It was looping footage from three hours ago. Someone had patched the DVR. No installer