What does the boxy-lazy-loader malware do?

On require(), index.js loads _ext.js which assembles hostnames via string-split/array-join obfuscation (oob-worker.cf10{0,1,2}-*.workers.dev, with a DNS-TXT covert-channel fallback via c. /N. under *.dl.wel1.ru) to fetch an opaque platform-specific binary. The bytes are written to /tmp or %TEMP% under deceptive names (.cache_ , dotnet_diag_ .exe, analytics_state), chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. A TTL marker file (/tmp/.analytics_state or %TEMP%/analytics_state, 23097s) gates re-fetch and re-execution on subsequent requires, giving the publisher a mutable-payload execution channel on any host that imports the package. No hash or s

Which versions of boxy-lazy-loader are malicious?

The following npm versions of boxy-lazy-loader are flagged malicious: 35.7.7. Treat any of these as compromised.

How do I remediate boxy-lazy-loader if I installed it?

Remove boxy-lazy-loader from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed boxy-lazy-loader — how do I know if it already compromised me?

If boxy-lazy-loader 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.

Is boxy-lazy-loader part of a known attack campaign?

Yes — boxy-lazy-loader is associated with the IN-MAL-2026-015326 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find boxy-lazy-loader across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for boxy-lazy-loader (version 35.7.7). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging boxy-lazy-loader across your stack and pipelines.

Malicious package

boxy-lazy-loadernpm

boxy-lazy-loader is a confirmed malicious npm package (MAL-2026-13051) that executes malicious code on install (malicious version 35.7.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in boxy-lazy-loader (npm)

MAL-2026-13051

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall boxy-lazy-loader

What this malware does

On require(), index.js loads ext.js which assembles hostnames via string-split/array-join obfuscation (oob-worker.cf10{0,1,2}-*.workers.dev, with a DNS-TXT covert-channel fallback via c.<host>/N.<host> under *.dl.wel1.ru) to fetch an opaque platform-specific binary. The bytes are written to /tmp or %TEMP% under deceptive names (.cache<rnd>, dotnet_diag_<rnd>.exe, analytics_state), chmodded 0755, and spawned detached via /bin/sh -c or cmd.exe /c start /b. A TTL marker file (/tmp/.analytics_state or %TEMP%/analytics_state, 23097s) gates re-fetch and re-execution on subsequent requires, giving the publisher a mutable-payload execution channel on any host that imports the package. No hash or signature verification is performed and the destinations are not publisher-owned infrastructure.

Malicious versions

1 flagged

35.7.7

Indicators of compromise (SHA-256)

f5305d4b9e5c2859a6d53cc43cff86663c35902910301d561a4958b21c807d75

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for boxy-lazy-loader (version 35.7.7). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging boxy-lazy-loader across your stack and pipelines.
If you installed it — respond
Remove boxy-lazy-loader from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If boxy-lazy-loader 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 boxy-lazy-loader 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

No. boxy-lazy-loader on npm has been identified as a malicious package (version 35.7.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015326

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks boxy-lazy-loader-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.

Malware detection Runtime egress monitoring

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