Microsoft purchased the software Softricity SoftGrid in 2006 and renamed it to Microsoft Application Virtualization, or App-V for short. Windows shipped with several libraries in System32 and SysWOW64 to support App-V.
One App-V library stands out from all the rest because it only has one exported function named IllBeBack
...
That's right!
A library signed by Microsoft, with Terminator
in the name, that only has a single callable function named IllBeBack
.