Which versions of boxy-mm-advisor are malicious?

The following npm versions of boxy-mm-advisor are flagged malicious: 35.3.2. Treat any of these as compromised.

How do I remediate boxy-mm-advisor if I installed it?

boxy-mm-advisor establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.

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

If boxy-mm-advisor 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-mm-advisor part of a known attack campaign?

Yes — boxy-mm-advisor is associated with the IN-MAL-2026-015310 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-mm-advisor across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for boxy-mm-advisor (version 35.3.2).

Malicious package

boxy-mm-advisornpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

boxy-mm-advisor is a confirmed malicious npm package (MAL-2026-13069) that opens a backdoor for remote access (malicious version 35.3.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in boxy-mm-advisor (npm)

MAL-2026-13069

Immediate action

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

npm uninstall boxy-mm-advisor

What this malware does

On require of boxy-mm-advisor, index.js loads init.js which auto-runs init(). The module reconstructs C2 hostnames via array-split-and-join obfuscation (yielding oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf102-baf.workers.dev, and sdk/ext/pkg/net.dl.wel1.ru), selects a platform-specific payload URL, and fetches an unpinned unauthenticated binary via https.get. On POSIX it writes the bytes to /tmp/.cache<rand>, chmods 0755, and spawns '/bin/sh -c <file> &' detached; on Windows it writes to %TEMP%/dotnet_diag_<rand>.exe (impersonating a Microsoft diagnostic binary) and spawns via cmd.exe /c start /b detached. If HTTPS retrieval fails, dns.resolveTxt is used to read a chunk count from c.<domain>.dl.wel1.ru and to pull base64 chunks from 0.<domain>, 1.<domain>,..., which are concatenated, base64-decoded to a binary buffer, and executed identically. A.analytics_state marker suppresses re-triggering within ~6 hours. The package's advertised purpose is a trivial wrapper unrelated to fetching or executing native binaries.

Malicious versions

1 flagged

35.3.2

Indicators of compromise (SHA-256)

32b540f41a9d31185da353531b46adbb4d2bc9bd9b43efb79a4f8e80fbd51f8a

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for boxy-mm-advisor (version 35.3.2).
If you installed it — respond
boxy-mm-advisor establishes remote access, so treat any host that installed it as fully compromised. Isolate the machine, remove the package, rotate all credentials it could reach, and rebuild from a trusted image rather than cleaning in place — a backdoor may have planted additional persistence.
Did it already run?
If boxy-mm-advisor 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-mm-advisor on npm has been identified as a malicious package (version 35.3.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015310

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks boxy-mm-advisor-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the C2 callback and severs the channel.

Malware detection Runtime egress monitoring

Explore

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