Which versions of create-mono-package are malicious?

The following npm versions of create-mono-package are flagged malicious: 0.0.0. Treat any of these as compromised.

How do I remediate create-mono-package if I installed it?

create-mono-package 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 create-mono-package — how do I know if it already compromised me?

If create-mono-package 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 create-mono-package part of a known attack campaign?

Yes — create-mono-package is associated with the IN-MAL-2026-007081 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 create-mono-package across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for create-mono-package (version 0.0.0).

Malicious package

create-mono-packagenpm

Advisory published Jun 19, 2026Updated Jun 19, 2026

create-mono-package is a confirmed malicious npm package (MAL-2026-6222) that steals credentials and exfiltrates sensitive data (malicious version 0.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in create-mono-package (npm)

MAL-2026-6222

Immediate action

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

npm uninstall create-mono-package

What this malware does

The package's postinstall hook (.prepare.cjs) collects host fingerprint data (os.hostname(), os.userInfo().username, platform/arch, all non-internal network interface IPs, npm registry) plus a full dump of process.env (only keys prefixed with npm_lifecycle are filtered out) and HTTPS-POSTs the JSON payload to open.larksuite.com. Both the destination host and URL path are obfuscated: the hostname is built from a reversed charcode array with a -7 offset (_hostDecoder), and the path is XOR-decoded against key Zk9x (_pathDecoder). The send is wrapped in extensive sandbox/honeypot evasion — the script silently process.exit(0)s when env keys match analysis-pipeline prefixes (SANDYCLAW_, OPENCLAW_, PERMISO_, CHAINRADAR_, PYPI_POISON_, ASPECT_TLOG, THREAT_ANALYZER_MODEL) or when hostname/username matches patterns like detonat/cuckoo/virus/scan, and dummy values for GITHUB_TOKEN/NPM_TOKEN/AWS_ACCESS_KEY_ID/AWS_SECRET_ACCESS_KEY are explicitly skipped to avoid honeypots. On a real developer or CI machine, npm install create-mono-package ships every credential present in the environment (GitHub PATs, npm publish tokens, AWS keys, CI secrets, DB URIs) to the attacker-controlled Lark endpoint.

Malicious versions

1 flagged

0.0.0

Indicators of compromise (SHA-256)

85402ef2db7bfd9e2bb01034a533e52649cf6058cc1e824e9c273aee5ae8121d

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for create-mono-package (version 0.0.0).
If you installed it — respond
create-mono-package 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 create-mono-package 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. create-mono-package on npm has been identified as a malicious package (version 0.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-007081

References

npmjs.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks create-mono-package-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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