MAL-2026-14147

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/typescipt-core/MAL-2026-14147.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14147
Published
2026-08-18T23:19:56Z
Modified
2026-08-18T23:45:11.530849145Z
Summary
Malicious code in typescipt-core (npm)
Details

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

Source: amazon-inspector (98b97af3a328b837904c7860b7acbae33bea28afb53949905868867905c14be6)

Package name typosquats typescript. The postinstall script (scripts/postinstall.js) XOR-decodes a download URL and a PowerShell launcher using key 'stf2026', then on Windows fetches an executable to %TEMP%\main.exe and spawns it detached; on WSL it decodes and executes a PowerShell bridge via exec. Before fetching the second stage, it POSTs a host-profile JSON (including a Windows/WSL label derived from inspecting /proc/version and /proc/sys/kernel/osrelease) over plain HTTP to the hardcoded bare IP 193.70.34.101 on port 20099 at path /vote. The network destinations and shell command are stored as XOR-encoded byte arrays (ADDONENC, BRIDGELAUNCHERENC, BRIDGESCRIPTPREENC, BRIDGESCRIPTPOST_ENC) and reconstructed at runtime. Cover-story identifiers ('TELEMETRY', 'addon') mask an install-time dropper: npm install typescipt-core results in attacker-controlled code executing on the installer's host.

Database specific 
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-18T23:41:21.748994717Z",
            "sha256": "98b97af3a328b837904c7860b7acbae33bea28afb53949905868867905c14be6",
            "modified_time": "2026-08-18T23:19:56Z",
            "source": "amazon-inspector",
            "id": "IN-MAL-2026-018182",
            "versions": [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / typescipt-core

Package

Name
typescipt-core
View open source insights on deps.dev
Purl
pkg:npm/typescipt-core

Affected ranges

Affected versions

1.*
1.0.0

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/typescipt-core/MAL-2026-14147.json"
indicators 
{
    "evidence_files": [
        {
            "sha256": "863610fdc28bd3f6614c82777d390e1fc9861c82c4a2864d12fb3ffb7bd5c98e",
            "tlsh": "e7d13fc61ef5a035874bf96884cf9d13b2a6c207330e4a65fb8f42107f5792c85a69d6",
            "path": "scripts/postinstall.js"
        }
    ],
    "package_integrity": [
        {
            "filename": "typescipt-core-1.0.0.tgz",
            "hashes": {
                "sha512_sri": "sha512-c63WrmABUL2wYAEqUwj0q+sOvyNuUh4inMJukK1ojFgOjulejPLcjlY8f7NzAGE2eMmN+PZhQyz6VaCS5yeqTg==",
                "sha1": "55c72e88a79188312ac9eedf08addc01a415d589"
            }
        }
    ]
}
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    }
]