MAL-2026-17228

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/nebulaai-sdk/MAL-2026-17228.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17228
Published
2026-09-28T18:08:06Z
Modified
2026-09-28T18:30:06Z
Summary
Malicious code in nebulaai-sdk (npm)
Details

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

Source: amazon-inspector (dc906b81107141fbd85dcabf89fd2f5112c4e4a134045c90d6a35abb4b67d16e)

The package's preinstall.js contains a base64+zlib-encoded 257 KB Windows PE executable. On npm install on Windows, the script decodes the blob and writes it to %LOCALAPPDATA%\Microsoft\Conhost\conhost.exe — a path and filename that impersonates a legitimate Windows console host binary — then spawns it via child_process.spawn with detached: true, stdio: 'ignore', and windowsHide: true, so execution is silent and survives the npm process. The decoded PE contains a section named .kntrat and references the external host 65.87.7.132 and the repository github.com/syskiel/kntrat-e, indicating remote command-and-control functionality (RAT-shaped naming). The package has no legitimate SDK functionality visible; the preinstall hook exists solely to stage and run the embedded executable. Installing this package on a Windows host results in full arbitrary code execution under the installing user, with a masqueraded persistent binary staged under LOCALAPPDATA and a C2 endpoint reachable at 65.87.7.132.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-020608",
            "import_time":  "2026-09-28T18:24:40.696005333Z",
            "modified_time":  "2026-09-28T18:08:06Z",
            "sha256":  "dc906b81107141fbd85dcabf89fd2f5112c4e4a134045c90d6a35abb4b67d16e",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / nebulaai-sdk

Package

Name
nebulaai-sdk
View open source insights on deps.dev
Purl
pkg:npm/nebulaai-sdk

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":  "preinstall.js",
            "sha256":  "8bc90df9b387849338d9c61a8d379cfbb0d70ea576c0e37e1fb07ba164921807",
            "tlsh":  "24e312267c5990351b18a613f83217257b336259152cd9363b3a08c709fad98cf7bebb"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "nebulaai-sdk-1.0.0.tgz",
            "hashes":  {
                "sha1":  "cf2ae5e39d71c8bf56d60ed9a2ae29d98e6c6300",
                "sha512_sri":  "sha512-OAc2iuXWbZebjdNGXjzg4D4Dhvo6bdXkd19VrGXxNR/c97vcO5YeOo97/UrlYETKlhY/DwsAaTWWmxNIuVbaqA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/nebulaai-sdk/MAL-2026-17228.json"