MAL-2026-14149

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/typescirpt-core/MAL-2026-14149.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-14149
Published
2026-08-18T23:20:47Z
Modified
2026-08-18T23:45:13Z
Summary
Malicious code in typescirpt-core (npm)
Details

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

Source: amazon-inspector (ef20a464d9f616eecfd6457a02895da80d1fabf558ef49de83dca18046551e90)

Package name 'typescirpt-core' typosquats 'typescript'. scripts/postinstall.js runs automatically on npm install and posts a JSON platform beacon to a hardcoded bare-IP endpoint at http://193.70.34.101:20099/vote (host constructed by array-join to evade static matching). It then XOR-decodes (key 'stf2026') an embedded integer array into a remote URL and downloads a Windows executable to %TEMP%/main.exe, spawning it detached with stdio ignored and window hidden. A separate WSL-detection branch XOR-decodes a PowerShell bridge launcher and pre/post script fragments and passes the reconstructed command to child_process.exec, so a Linux WSL install pivots execution back to the host Windows side. The URL, launcher command, and script fragments are all stored as XOR-encoded byte arrays and reconstructed at runtime immediately before exec/https.get, hiding the download destination and command line from static inspection.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-018188",
            "import_time":  "2026-08-18T23:41:22.262469767Z",
            "modified_time":  "2026-08-18T23:20:47Z",
            "sha256":  "ef20a464d9f616eecfd6457a02895da80d1fabf558ef49de83dca18046551e90",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / typescirpt-core

Package

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

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":  "scripts/postinstall.js",
            "sha256":  "9add9254ecb92b4ad1daddf025cc9cf2b9be12d324fcc671316b6cc6f4bab1b0",
            "tlsh":  "40d13fc61ef59035874bf96884cf9d13b2a6c207330e4a65ff8f42107f5792c85a69ea"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "typescirpt-core-1.0.0.tgz",
            "hashes":  {
                "sha1":  "624251d4805f129ab64cce5c6f53008f2918d56b",
                "sha512_sri":  "sha512-uAuMrM1Awl/XyUW2rgBcdDmZLSdBIf8REeJHLFQuc1JeGnQH9uoWidflvPkAL+ysHKWIme7ft3+WDz4cMpwFdA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/typescirpt-core/MAL-2026-14149.json"