I'm looking for a way to change the password for some user of a Windows box remotely from a Linux Box. Really I have to do it by running some program/system script on the Linux Box but without running anything more than standard services on the windows system.
Linux – Changing Windows remote System Password from Linux
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Windows XP Home does not allow network logon other than via the Guest account. So you have to enable it first of all.
This gave me a new error telling me that the "logon type" wasn't permitted. Logon type was "code 3", which I found out to mean "network logon". Activating file sharing fixed this, but I have no idea why.
Of course, Guest is not allowed to shutdown the computer, so the account has to be added to the Administrators group (which is of course a massive violation of any security guidelines, but remember this is completely local, all under my desk and staying there) by issuing the following command in the shell:
net localgroup Administrators Guest /ADD
And then, you'll find out that the RPC shutdown command seems to require the winreg named pipe on the target which seems to be provided by the Remote Registry service, which is not available in XP Home. So, for now, no remote shutdown for me.
It should be noted that XP Home just isn't meant to work in a managed, professional network, but I'm choosing the systems to test on for what I'm expecting on the target machines, not what I want to use. However, a note in the net/rpcclient manpages would have been very kind...
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Best Answer
You can update the "unicodePwd" attribute of the user object using LDAP over SSL to reset a user's password. This is probably the most straightforward "cross-platform friendly" way to make such a change because, on the Linux site, you won't need any MSRPC infrastructure.