It cannot enter Unix systems or PC's. The writer apparently wishes to embarrass system managers and network administrators.
Indications point to an origin in Germany.
I spent several hours creating bogus announcements to confuse and counteract the virus writer. The virus writer has collected these announcements, and has no way to tell which announcements are valid, and which are phoney. The worm generates a random node address and tries to copy itself onto that node. If this fails, it tries different random nodes until it finds one. Once it's in your system, it creates a list of all users on your node, and mails a message to each of them.