Secur32#getUsernameEx does not return the Windows Account Name

[puperzenkarl]

I try to extract the account name of the logged in user via Secur32Util.getUserNameEx(Secur32.EXTENDED_NAME_FORMAT.NameUserPrincipal) (Standard Windows Domain).
On some workstations it returns a completely different account name. Looks like all these workstations have some common third party software installed (The returned account name equals the account name of the third party software).
Why?

[Daniel Doubrovkine]

What's the application that's extracting the name? A web service? A desktop app?

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[puperzenkarl .]

Eclipse RCP Application

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[Daniel Doubrovkine]

So maybe the remote process runs under the credentials of the service user that's being returned? 

[puperzenkarl]

There is no remote process. The client logs in to his Windows Workstation with his domain account, e.g. USR1234. Then he starts our Eclipse RCP application, which tries to detect the Windows Account via JNA. But the mentioned method call does not return USR1234, but instead returns the account name of some third party browser based application. How is this possible?

[Daniel Doubrovkine]

I am going to say that it's not possible unless the Eclipse RCP application is executing via some kind of remote procedure. Usually Windows APIs don't lie, you're running the Java process under that account. The extension is likely inserting itself in in some weird way.

On Wed, Sep 9, 2015 at 7:16 AM, puperzenkarl <karl.p...@gmail.com> wrote:

There is no remote process. The client logs in to his Windows Workstation with his domain account, e.g. USR1234. Then he starts our Eclipse RCP application, which tries to detect the Windows Account via JNA. But the mentioned method call does not return USR1234, but instead returns the account name of some third party browser based application. How is this possible?

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[Daniel Doubrovkine]

I would be worried :)