Netskope Threat Labs

Brontok

ATP Sandbox Adv. HeuristicsAV

Brontok is a mass mailing worm from 2005 that spread through email attachments and infected removable drives, primarily hitting Indonesian users. It kills security processes, modifies browser settings, and restarts the machine when certain tools run, and its armored variants kept resurfacing for years.

First seen
January 2022
Last seen
October 2026
Alert Name
Document-HTML.Worm.Brontok
Generic.Brontok.27686492
MemScan:Win32.Worm.Brontok.AM
Win32.Brontok.1.Gen@mm
Win32.Brontok.A@mm
Win32.Brontok.AP@mm
Win32.Brontok.MK
Win32.Brontok.MO
Win32.Brontok.MS
Win32.Brontok.NB