These are sets of registry keys used to debug applications when needed by developers. They allow developers to configure specific execution options for an image file (executable) without modifying the actual binary code.

References:

• https://www.malwarebytes.com/blog/news/2015/12/an-introduction-to-image-file-execution-options

• https://hejelylab.github.io/blog/IRC/Persistence-IFEO

• https://learn.microsoft.com/en-us/sysinternals/resources/windows-internals

IFEO