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Malicious package

@hotcappuccino/nodepullnpm

Malicious code in @hotcappuccino/nodepull (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-6085
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @hotcappuccino/nodepull

What this malware does

@hotcappuccino/[email protected] ships a single index.js (the package's declared main) that is wrapped in an obfuscator.io string-array + RC4-encrypted-string scheme. At top level — fires on every require('@hotcappuccino/nodepull') — the module loads child_process, fs, os, path, and an HTTP client; reconstructs a dotted URL through repeated ''.repeat(N,'.') concatenations of RC4-decrypted fragments; performs httpClient.get(URL + path); writes the response body to path.join(os.tmpdir(), <filename>) via fs.writeFileSync(..., {flag:'w+'}); and immediately invokes child_process.spawn(filePath, args, {windowsHide: true, cwd: os.tmpdir()}). The 249-entry rotated string array is decoded by b/c using base64 + RC4 keyed by index 0, hiding the URL, spawned command, and required module names from inspection. There is no legitimate purpose served by RC4-encrypting every string (including module names) in a package whose only behavior is to fetch and execute a remote binary at import time. Any installer that requires this package executes attacker-controlled bytes from a hidden remote endpoint as a child process with the console window suppressed.

Malicious versions

1 flagged
1.0.0

Indicators of compromise (SHA-256)

42e9bbd7a5cb25d0863ef140b42a7ab2abec1e921e18669eef3f07a91c3d6d99

Frequently asked questions

No. @hotcappuccino/nodepull 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-2026-006949

References

Credits

  • Amazon Inspector · finder

Scan your dependencies

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

Supply-chain protection
@hotcappuccino/nodepull (npm) malicious package — MAL-2026-6085 | O3 Security