{"id":"MAL-2026-6420","summary":"Malicious code in leo-cdk-lib (npm)","details":"The `leo-cdk-lib` npm package was compromised as part of the Miasma worm campaign targeting the LeoPlatform npm ecosystem. On June 24, 2026, 20 LeoPlatform packages were published within a 3-second window by a threat actor who had taken over the npm account `czirker` belonging to the LeoPlatform organization.\n\nThe malicious payload is triggered automatically during `npm install` via a `binding.gyp` file using node-gyp command expansion (`\u003c!(node index.js \u003e /dev/null 2\u003e&1 && echo stub.c)`), which bypasses lifecycle script scanners. The replaced `index.js` (~5.2 MB, obfuscated with ROT-N + AES-128-GCM encryption) deploys a multi-stage worm with the following capabilities:\n\n- Credential theft: Targets npm, GitHub, PyPI, RubyGems, Kubernetes, HashiCorp Vault, AWS (IAM keys, Secrets Manager, IMDS), 1Password, JFrog Artifactory, and SSH keys.\n- AI tool targeting: Exfiltrates configuration files for Claude, Cursor, Gemini, and VS Code.\n- Worm propagation: Enumerates npm packages and auto-publishes version bumps to spread to other maintainers in the ecosystem.\n- GitHub persistence: Creates orphan `snapshot-\u003chex\u003e` branches with fake \"Dependabot Updates\" workflows to maintain access after initial compromise.\n\nAny system that installed this version should be considered fully compromised. Rotate all secrets immediately from a separate, clean machine. See the linked SafeDep report for full payload analysis, indicators of compromise, and remediation guidance.\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (0c00b5f0c306cb1af4497ed1726f1889b62a9b20d64de1dceb3181fbd7ca263b)\nThe package ships a binding.gyp at the root that contains GYP command-expansion syntax (\u003c!(...)) inside the targets/sources fields. npm implicitly runs node-gyp rebuild whenever a binding.gyp is present, even without a declared install/postinstall script, and GYP evaluates \u003c!(...) as a shell command during the configure step. This causes the embedded command to execute automatically on `npm install`, functionally equivalent to a lifecycle hook. The package does not ship corresponding native source files (.c/.cc/.cpp/.h) that would justify a real node-gyp build, indicating the binding.gyp's purpose is to run the embedded command rather than to build a native addon.\n","modified":"2026-06-25T08:01:28.976100947Z","published":"2026-06-24T23:04:55Z","database_specific":{"malicious-packages-origins":[{"import_time":"2026-06-25T07:47:50.61785631Z","sha256":"0c00b5f0c306cb1af4497ed1726f1889b62a9b20d64de1dceb3181fbd7ca263b","source":"amazon-inspector","id":"IN-MAL-2026-007468","versions":["0.0.2"],"modified_time":"2026-06-25T06:30:28Z"}],"iocs":{"urls":["https://safedep.io/miasma-worm-hits-leoplatform-20-npm-packages/"]}},"references":[{"type":"ARTICLE","url":"https://safedep.io/miasma-worm-hits-leoplatform-20-npm-packages/"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/leo-cdk-lib/v/0.0.2"}],"affected":[{"package":{"name":"leo-cdk-lib","ecosystem":"npm","purl":"pkg:npm/leo-cdk-lib"},"versions":["0.0.2"],"database_specific":{"cwes":[{"name":"Embedded Malicious Code","description":"The product contains code that appears to be malicious in nature.","cweId":"CWE-506"},{"name":"Embedded Malicious Code","description":"The product contains code that appears to be malicious in nature.","cweId":"CWE-506"}],"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/leo-cdk-lib/MAL-2026-6420.json","indicators":{"evidence_files":[{"sha256":"32d1bc728d8e504952083a6adc488c309a401c7df4dc8f47b382ce32e4aebe21","path":"binding.gyp","tlsh":"48c08c3ca9380d1029d958285168d402a4b142a3494e2a81fade60284fa840b2898bad"}],"package_integrity":[{"hashes":{"sha1":"ef8bf6dd92cbc29ef8d23f3f0fa786ed20a856b1","sha512_sri":"sha512-/GYUgNuZuL7psrw6uPo6S9Af17dAqJGUECm37Eq//yi0w3uYCb55ciMrOD5dwTsq2kE8zlX7vJ9tF9qqfWGzyg=="},"filename":"leo-cdk-lib-0.0.2.tgz"}]}}}],"schema_version":"1.7.5","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"},{"name":"SafeDep","contact":["https://safedep.io"],"type":"FINDER"}]}