Which versions of boxy-constants are malicious?

The following npm versions of boxy-constants are flagged malicious: 35.2.7. Treat any of these as compromised.

How do I remediate boxy-constants if I installed it?

boxy-constants is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

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

If boxy-constants was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is boxy-constants part of a known attack campaign?

Yes — boxy-constants is associated with the IN-MAL-2026-015359 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-constants across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for boxy-constants (version 35.2.7).

Malicious package

boxy-constantsnpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

boxy-constants is a confirmed malicious npm package (MAL-2026-13033) that steals credentials and exfiltrates sensitive data (malicious version 35.2.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in boxy-constants (npm)

MAL-2026-13033

Immediate action

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

npm uninstall boxy-constants

What this malware does

On require of the package, index.js loads shim.js which reconstructs attacker-controlled hostnames from split-string arrays (Cloudflare Workers subdomains such as oob-worker.cf100-41.6.workers.dev and *.dl.wel1.ru), selects an OS/arch-specific URL for linux_x64/linux_arm64/darwin/win32, fetches an unsigned, unhashed binary via https.get, writes it to /var/tmp/.cache<hex> on POSIX or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods 0755, and detaches it via spawn("/bin/sh",["-c", fp+" &"]) or cmd /c start. A DNS-TXT base64 channel provides a fallback host-resolution path. A marker file '.analytics_state' implements cooldown-based execution suppression, and a stealth logger writes empty strings to stderr. Decoy filenames (dotnet_diag_,.cache_) and 'analytics/telemetry' naming disguise the dropper. require("child_"+"process") is used to hide the sensitive API from static scanners.

Malicious versions

1 flagged

35.2.7

Indicators of compromise (SHA-256)

de3d566208b48f775ec51e3308934813973ad0a6fef6cb98fd438042056bb9b0

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for boxy-constants (version 35.2.7).
If you installed it — respond
boxy-constants is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If boxy-constants was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. boxy-constants on npm has been identified as a malicious package (version 35.2.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015359

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks boxy-constants-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

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