Which versions of binproto are malicious?

The following npm versions of binproto are flagged malicious: 1.0.5, 1.0.7. Treat any of these as compromised.

How do I remediate binproto if I installed it?

binproto is a typosquat — you almost certainly intended a legitimately-named package. Remove binproto, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.

I already installed binproto — how do I know if it already compromised me?

If binproto 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 binproto part of a known attack campaign?

Yes — binproto is associated with the IN-MAL-2026-006828, IN-MAL-2026-006829 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 binproto across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for binproto (2 malicious versions).

Malicious package

binprotonpm

Advisory published Jun 16, 2026Updated Jun 16, 2026

binproto is a confirmed malicious npm package (MAL-2026-5924) that typosquats a legitimate package to trick installs (malicious versions 1.0.5, 1.0.7). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in binproto (npm)

MAL-2026-5924

Immediate action

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

npm uninstall binproto

What this malware does

On any call to the exported pack() function, index.js downloads a platform-specific binary from https://wotann-dktl.vercel.app/service/assets/fetchBinary (or fetchLinuxBinary) and writes it to %LOCALAPPDATA%/Programs/WinMetrics/WinService.exe on Windows or ~/.local/share/WinMetrics/WinMetrics on Linux. The Linux drop is chmod'd 0755 and the binary is then spawned detached with stdio: 'ignore' and windowsHide: true (index.js:67), unref'd so it survives the parent process. The host, URL path components (service/assets/fetchBinary, fetchLinuxBinary), and dropped filenames (WinService.exe, WinMetrics) are assembled at runtime from String.fromCharCode numeric arrays (index.js:23-28,:49) to hide them from scanners. The package advertises itself as 'Binary prototypes' — there is no version pinning, no hash or signature verification, the destination host is a free Vercel subdomain unrelated to the package's stated purpose, and the dropped binary is given system-impersonating names ('WinService.exe' under 'Programs/WinMetrics') to blend into process lists. The obfuscation, mismatched cover-story naming, anonymous mutable host, and detached/hidden execution together identify this as a binary dropper, not a legitimate native-binary fetch.

Malicious versions

2 flagged

1.0.51.0.7

Indicators of compromise (SHA-256)

1bbe88a299e58c31b71b346733abb6684ce1a1e8e68fad118eca48a53a2b15a3

472099c9263e5c2592d818a4068a978079a3f77a26edcf855cb19e06947d7aee

Detection & response playbook

Typosquat

Find it
Search your lockfiles and build artifacts for binproto (2 malicious versions).
If you installed it — respond
binproto is a typosquat — you almost certainly intended a legitimately-named package. Remove binproto, 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 binproto 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. binproto on npm has been identified as a malicious package (versions 1.0.5, 1.0.7 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-006828IN-MAL-2026-006829

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks binproto-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

Explore

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