W32/Rbot-WE is a network worm which also contains IRC backdoor Trojan functionality, allowing unauthorised remote access to the infected computer.
W32/Assiral-A is a mass mailing worm which attempts to spread itself by sending emails with the following characteristics to addresses found in the victim's address book:
Subject: Re: LOV YA!
Body: Kindly read and reply to my LOVE LETTER in the attachments
W32/Assiral-A will attempt to copy itself to floppy drives and network shares.
On opening the attachment, W32/Assiral-A will open a web page through Internet Explorer at geocities.com. W32/Assiral-A will attempt to modify Internet Explorer's homepage to the same page.
It will also attempt to kill off various security related applications and disable various capabilities of Windows.