IFEO Debugger hijack of Windows accessibility tools (login-screen backdoor)
Detects modifications to the Image File Execution Options (IFEO) registry keys for critical Windows accessibility binaries such as osk.exe, utilman.exe, sethc.exe, magnify.exe, and narrator.exe. This technique is commonly used by adversaries to establish persistence or facilitate unauthenticated privilege escalation by replacing these tools with malicious executables (e.g., cmd.exe) that execute when triggered from the Windows login screen.
Sigma
