Which versions of stream-read-35cf are malicious?

The following npm versions of stream-read-35cf are flagged malicious: 1.0.0. Treat any of these as compromised.

How do I remediate stream-read-35cf if I installed it?

Remove stream-read-35cf from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound network activity or persistence. Use O3 Security's dependency scanner to confirm the package and its artifacts are fully purged across your stack.

Is stream-read-35cf part of a known attack campaign?

Yes — stream-read-35cf is associated with the IN-MAL-2026-006959 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

Can O3 Security detect stream-read-35cf in my codebase?

Yes. O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, blocking stream-read-35cf and packages like it before any post-install script runs.

Malicious package

stream-read-35cfnpm

Malicious code in stream-read-35cf (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6099

Immediate action

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

npm uninstall stream-read-35cf

What this malware does

Package declares a postinstall hook ("postinstall": "node run.js") that auto-executes run.js on npm install. run.js imports os, fs, http, https, and child_process and collects host identifiers (os.hostname(), os.userInfo(), os.platform(), process.env.USER, process.cwd()), reads files via fs.readFileSync / fs.existsSync, base64-encodes data via Buffer.from(...).toString('base64'), and POSTs the results to remote endpoints over http/https (multiple POST call sites at lines 135, 138, 347, 354). The package name is a short random-suffixed identifier with no documented purpose, and the only effect of installing the package is the reconnaissance + exfiltration payload. This is the canonical install-time stealer shape.

Malicious versions

1 flagged

1.0.0

Indicators of compromise (SHA-256)

0597f71a1c39a743a4323636794601b480a1cda0c64df20d6bafa7ed601da84e

Frequently asked questions

No. stream-read-35cf on npm has been identified as a malicious package (version 1.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-006959

References

npmjs.com

Credits

Amazon Inspector · finder

Scan your dependencies

O3 Security blocks malicious packages like this at install time and in CI.

Supply-chain protection