Bagle (computer worm)

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