NetSky.Y worm was discovered late night on April 20th, 2004. It is similar to the Netsky.X variant found earlier during the same day. It is repacked with PEpack.
If the infection is in a local network, please follow the instructions on this webpage:
Find the latest advice in our Community Knowledge Base.
See the manual for your F-Secure product on the Help Center.
Submit a file or URL for further analysis.
For more information on Netsky.X see: Netsky.X
Netsky.Y sends email messages that look as follows:
Subject: Delivery failure notice (ID-random number) Attachment: www.random domain name.random user name.session.random number.com
The body of the message contains one of the following words:
Partial, External, New or Delivered
followed by the text:
message is available