Malicious code in leo-streams (npm)
The leo-streams 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.
The malicious payload is triggered automatically during npm install via a binding.gyp file using node-gyp command expansion (<!(node index.js > /dev/null 2>&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:
snapshot-<hex> branches with fake "Dependabot Updates" workflows to maintain access after initial compromise.Any 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.
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The package ships a binding.gyp containing GYP command-expansion syntax (<!(...)) at line 6. npm implicitly runs node-gyp rebuild whenever a binding.gyp is present, and GYP evaluates <!(...) as a shell command during the configure step — so the embedded command executes automatically on npm install even though the package declares no install/postinstall script. This pattern is a covert install-time code-execution channel that bypasses lifecycle-hook scrutiny. Installers running npm install leo-streams will execute whatever shell command is embedded in binding.gyp without consent or visibility.
왜 이 VPI인가 (설명가능 · 실험적)
VPI 산정 기준
| 영향도(기본값(정보 없음)) | 55.00 |
| 악용 신호(추가 악용신호 없음) | ×1.00 |
| VPI | 55.00 |
VPI 공식 vpi-v1 기준