MAL-2026-10535

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/my-empty-package/MAL-2026-10535.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-10535
Published
2026-07-14T03:57:12Z
Modified
2026-07-14T04:46:57Z
Summary
Malicious code in my-empty-package (npm)
Details

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (914ffc98ce1f6553e4f9655208318800d0d22663842eb4c9a3d0d51d4f143bdd)

package.json declares postinstall: node index.js. On npm install, index.js branches on os.platform() and executes platform-specific shell commands: osascript on macOS, powershell -WindowStyle Hidden -EncodedCommand <base64-UTF16LE> on Windows, and python3 -c 'os.system(...)' on Linux. After the payload runs, a cleanup step renames a shipped package.md over package.json and unlinks index.js itself, removing the install-time script from disk and presenting a different manifest to any post-install inspection. The hidden-window base64-encoded PowerShell invocation is a standard malware evasion technique. Manifest swap + entrypoint self-deletion is anti-forensic behavior with no legitimate purpose. Even though the current payload body is a benign demonstration (opens the calculator), the delivery framework is a fully-functional install-time RCE dropper skeleton: any content placed in the platform branches would execute automatically on install with the user's privileges and then erase its own traces.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-010388",
            "import_time": "2026-07-14T04:32:00.331549657Z",
            "modified_time": "2026-07-14T03:57:12Z",
            "sha256": "914ffc98ce1f6553e4f9655208318800d0d22663842eb4c9a3d0d51d4f143bdd",
            "source": "amazon-inspector",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / my-empty-package

Package

Name
my-empty-package
View open source insights on deps.dev
Purl
pkg:npm/my-empty-package

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "index.js",
            "sha256": "ba863a083c54fd75f7341c1020db15b6d26622c72922716b3e1feadfd0c1496f",
            "tlsh": "f2219c6446faab3189a2abd6199b041d3157a4523642fac939cc57846f9143402b2ab8"
        }
    ],
    "package_integrity": [
        {
            "filename": "my-empty-package-1.0.0.tgz",
            "hashes": {
                "sha1": "11c9b8fa4788771bf9d22695a5ac6796aa940ddd",
                "sha512_sri": "sha512-7nSci3HjMWN0dT5SJvcsLBGZEmtkBbBsp29ylrUM/Syi0/uqAzP4q5/YFp0ODl2OuE9qboPByjOOpxsANwGs6w=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/my-empty-package/MAL-2026-10535.json"