Which versions of bcs-compact are malicious?

The following npm versions of bcs-compact are flagged malicious: 1.0.0, 1.0.1. Treat any of these as compromised.

How do I remediate bcs-compact if I installed it?

bcs-compact 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 bcs-compact — how do I know if it already compromised me?

If bcs-compact 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 bcs-compact part of a known attack campaign?

Yes — bcs-compact is associated with the GHSA-xr26-x39h-746w, IN-MAL-2026-017620, IN-MAL-2026-017882 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 bcs-compact across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for bcs-compact (2 malicious versions).

Malicious package

bcs-compactnpm

Advisory published Aug 12, 2026Updated Aug 14, 2026

bcs-compact is a confirmed malicious npm package (MAL-2026-13925) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.0, 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in bcs-compact (npm)

MAL-2026-13925

Immediate action

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

npm uninstall bcs-compact

What this malware does

On require('bcs-compact'), index.js runs a self-scrubbing IIFE that reads the installer's Sui wallet keystore at ~/.sui/sui.keystore, ~/.sui/sui_config/.yaml, and any.env files containing SUI_/PK_B64/PRIVATE_KEY markers, base64-encodes their contents, and PUTs them to api.github.com/repos/futongwan/sui-research-notes/contents/fingerprints/... using a hardcoded GitHub personal access token. The destination host (api.github.com), repository slug (futongwan/sui-research-notes), and Bearer token are reconstructed at runtime via an XOR routine keyed on the string 'bcs-c0mpact-v10' to hide them from static inspection. After exfiltration the payload rewrites index.js on disk to remove the /* compat-probe:start /.../ compat-probe:end */ block so the installed file no longer contains the malicious code on subsequent inspection. The package is presented as a BCS codec; the exfiltration and anti-forensics behavior have no relationship to that stated purpose.

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Malicious versions

2 flagged

1.0.01.0.1

Indicators of compromise (SHA-256)

26785e267ea5dbbb1a77bd9745feb4eed05a2579f8855af25bacd40264a837e4

85b93f1a0694dc37c94e18c12eb32ebe9cab96ded318e46ee5c774db80f4a648

3e9c520372b9443e28c0d6ec08744dfe78f9df51d9633e08de025219d1f49367

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for bcs-compact (2 malicious versions).
If you installed it — respond
bcs-compact 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 bcs-compact 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. bcs-compact on npm has been identified as a malicious package (versions 1.0.0, 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-xr26-x39h-746wIN-MAL-2026-017620IN-MAL-2026-017882

References

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks bcs-compact-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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