In a previous post I already explained a similar campaign:
Your FaceBook password has been changed
First of all, you would receive an email similar to this one:
Dear user of FaceBook.
Your password is not safe! To secure your account the password has been changed automatically.
Attached document contains a new password to your account and detailed information about new security measures.
Thank you for your attention,
Administration of Facebook.
The executable also tries to connect (called "phoning home") to download additional malware. However, at time of writing the URLs were offline.
If you receive emails like this, you should already be alerted:
"Why would Facebook send me an email my password has been changed ?"
The answer is simple: they don't. Whether you have Facebook or not, instantly delete the email and don't look back.