webpackbootstrapscriptsnpm
webpackbootstrapscripts is a confirmed malicious npm package (MAL-2026-16202) that typosquats a legitimate package to trick installs (malicious version 5.110.3). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in webpackbootstrapscripts (npm)
What this malware does
[email protected] typosquats bootstrap and ships a disguised in-browser proxy kit. Its bundled loader (index-z2b7r4.js) XOR-decodes a list of endpoints with a fixed key and injects remote scripts from https://dyingefforlessefforlessours.com via document.head.appendChild, then boots a Scramjet/wisp WebSocket proxy that routes page traffic through operator-controlled relays. The loader matches (same sha256) sibling packages webpackbootstrapscripts and @zaka13/thing by the same publisher (zaka13). Harm is browser-side when the asset is served; no install script runs.
Malicious versions
Detection & response playbook
TyposquatFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for webpackbootstrapscripts (version 5.110.3). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging webpackbootstrapscripts across your stack and pipelines.
If you installed it — respond
webpackbootstrapscripts is a typosquat — you almost certainly intended a legitimately-named package. Remove webpackbootstrapscripts, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If webpackbootstrapscripts was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks webpackbootstrapscripts before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Credits
- pkgwarden · finder
Detect & block this
O3 blocks webpackbootstrapscripts-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.