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.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
Eliminating a Local Network Outbreak
If the infection is in a local network, please follow the instructions on this webpage:
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