Which versions of boxy-story-header are malicious?

The following npm versions of boxy-story-header are flagged malicious: 35.7.2. Treat any of these as compromised.

How do I remediate boxy-story-header if I installed it?

boxy-story-header 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-story-header — how do I know if it already compromised me?

If boxy-story-header 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-story-header part of a known attack campaign?

Yes — boxy-story-header is associated with the IN-MAL-2026-015286 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-story-header across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for boxy-story-header (version 35.7.2).

Malicious package

boxy-story-headernpm

Advisory published Aug 5, 2026Updated Aug 5, 2026

boxy-story-header is a confirmed malicious npm package (MAL-2026-13085) that opens a backdoor for remote access (malicious version 35.7.2). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in boxy-story-header (npm)

MAL-2026-13085

Immediate action

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

npm uninstall boxy-story-header

What this malware does

index.js unconditionally requires./setup on load. setup.js reconstructs C2 hostnames by array-joining string fragments (Cloudflare Workers subdomains including oob-worker.cf99-9b3.workers.dev) and falls back to a base64-chunked DNS-TXT covert channel under numeric subdomains of wel1.ru. It downloads a platform-specific binary via https.get, writes it to /tmp/.cache_<hex> or %TEMP%\dotnet_diag_<hex>.exe under a hidden or system-masquerading name, chmods it 0755, and spawns it detached through /bin/sh -c or cmd.exe /c start /b with no signature or hash verification. lib/telemetry.js reimplements the same fetch-decode-chmod-spawn dropper primitives (Buffer.from(...,'base64'), fs['chmod'+'Sync'](path, mode|0o755), cp.spawn('/bin/sh',['-c',filePath+' &'],{detached:true})). Host obfuscation, DNS-TXT fallback, hidden/masquerading filenames, and unauthenticated remote execution on import satisfy the install-time-rce fingerprint (known-bad-infrastructure dropper).

Malicious versions

1 flagged

35.7.2

Indicators of compromise (SHA-256)

6a1273cea6d0d4cdf432c47fda7e95f529858a1bddefaaeeb976248ea55504f2

Detection & response playbook

Backdoor / remote access

Find it
Search your lockfiles and build artifacts for boxy-story-header (version 35.7.2).
If you installed it — respond
boxy-story-header 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-story-header 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-story-header on npm has been identified as a malicious package (version 35.7.2 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-015286

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks boxy-story-header-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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