By John Leyden, The Register Mar 11 2004 8:27AM
Two new NetSky worms appeared on the scene yesterday, despite a promise by the original author this week to refrain from releasing any more versions.
Differences in the code of NetSky-L and NetSky-M from their 11 older siblings have led anti-virus researchers to suspect that they are the work of a copycat. This suggests the source code of the virus has been leaked.
Text hidden inside NetSky-K said that it would be "the last version", but warned that the source code would be "available soon". Releasing the source code would make it far easier for other viruswriters to create new versions of the worm, such as NetSky-L.