Returned mail: see transcript for details

["Automatic Email Delivery Software" <postmaster@ths.kth.se>]

Dear user kf-web-archive@ths.kth.se,

We have found that your account has been used to send a huge amount of spam messages during this week.
Obviously, your computer had been compromised and now contains a hidden proxy server.

We recommend that you follow the instruction in the attached file in order to keep your computer safe.

Have a nice day,
ths.kth.se technical support team.

attachment.zip