Threat Group Cards: A Threat Actor Encyclopedia
Archived: 2026-04-05 13:36:46 UTC
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 Tool: Bookworm
Names Bookworm
Category Malware
Type Backdoor, Keylogger, Info stealer
Description
(Palo Alto) Bookworm’s functional code is radically different from PlugX and has a rather
unique modular architecture that warranted additional analysis by Unit 42. Bookworm has
little malicious functionality built-in, with its only core ability involving stealing keystrokes
and clipboard contents. However, Bookworm expands on its capabilities through its ability to
load additional modules directly from its command and control (C2) server.
Information Malpedia Last change to this tool card: 27 December 2022
Download this tool card in JSON format
All groups using tool Bookworm
Changed Name Country Observed
APT groups
 Bookworm 2015
1 group listed (1 APT, 0 other, 0 unknown)
Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=f4215b2e-bc7d-4294-a842-9bfb0fa34414
https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=f4215b2e-bc7d-4294-a842-9bfb0fa34414
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