registry / calculator-preinstall-hook-demo / 1.0.0
calculator-preinstall-hook-demo@1.0.0
AI Security Review
scanned 6d ago · by lpm-firewall-aiThe preinstall hook’s behavior is explicit, platform-limited, and documented as the package’s purpose. The import entry point only exports a function, and no attack behavior was identified.
Static reason
One or more suspicious static signals were detected.
Trigger
The `preinstall` lifecycle script runs during installation when lifecycle scripts are permitted.
Impact
A visible Calculator window may open during installation on Windows, with a marker file written in the package directory.
Mechanism
Writes `.preinstall-marker.json`; on Windows, starts the system Calculator, and skips that launch on other platforms.
AI rationale
The preinstall hook’s behavior is explicit, platform-limited, and documented as the package’s purpose. The import entry point only exports a function, and no attack behavior was identified.
Evidence
.preinstall-marker.json
Decision evidence
public snapshotAI called this Clean at 98.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- The package describes itself as a fixture that opens Windows Calculator and writes a marker during preinstall.
- The preinstall hook writes `.preinstall-marker.json` in the package directory.
- On Windows, the hook launches the system Calculator; on other platforms, it skips the launch.
- The README identifies this as an installation side-effect demo and says Calculator is skipped on other operating systems.
- Importing `index.js` only exports a function that returns a string.
Evidence against
- The preinstall hook runs automatically during dependency installation and launches a GUI application on Windows.
Behavioral surface
ChildProcessEnvironmentVarsFilesystem
HighEntropyStrings
NoLicense
Source & flagged code
6 flaggedpackage.jsonView file
•scripts.preinstall = node preinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.preinstall = node preinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkg4"description": "Test fixture: opens Windows Calculator and writes a marker during preinstall",
"main": "index.js",
"files": ["index.js", "preinstall.js"],
Low
Ai Review Evidence
The package describes itself as a fixture that opens Windows Calculator and writes a marker during preinstall.
package.jsonView on unpkg · L4preinstall.jsView file
Findings
1 High3 Medium8 Low
HighInstall Time Lifecycle Scriptspackage.json
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowNo License
LowAi Review Evidencepackage.json
LowSuspicious Lifecycle Evidencepreinstall.js
LowAi Review Evidencepreinstall.js
LowAi Review EvidenceREADME.md
Affected versions and remediation
This report applies to calculator-preinstall-hook-demo@1.0.0.
See all versions of calculator-preinstall-hook-demo for other recorded verdicts.
- Review the evidence and your use of calculator-preinstall-hook-demo@1.0.0 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
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