Windows Remote Access Dialer
rasautou -d powershell.dll -p powershell -a a -e e
Loads the target .DLL specified in -d and executes the export specified in -p. Options removed in Windows 10.
Execute DLL code
C:\Windows\System32\rasautou.exe
Sigma: https://github.com/SigmaHQ/sigma/blob/08ca62cc8860f4660e945805d0dd615ce75258c1/rules/windows/process_creation/win_rasautou_dll_execution.yml, IOC: rasautou.exe command line containing -d and -p
FireEye (@FireEye)