C:\Users\ken>dir C:\Windows\System32\OpenSSH\scp.exe
...
19-Mar-19  17:19           322,560 scp.exe
...

##</code><code>##

C:\Users\ken>perl -e "my $cmd = qq{C:\\Windows\\System32\\OpenSSH\\scp.exe D:\\tmp\\sample.dat W\@X.Y.Z:/A/B/C/tmp/sample.dat}; qx{$cmd}"
Password:

C:\Users\ken>