Bagle (computer worm)

Bagle
Malware details
AliasesBeagle, Bagle.A, Bagle.B, Bagle.C, Bagle.D, Bagle.J, Bagle.Z
TypeComputer worm
SubtypeTrojan
Isolation dateJanuary 18, 2004
Technical details
SizeVaries upon type

Bagle (also known as Beagle) was a mass-mailing computer worm affecting Microsoft Windows. The first strain, Bagle.A, did not propagate widely. A second variant, Bagle.B, was considerably more virulent.