MAL-2026-12259

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks/MAL-2026-12259.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12259
Aliases
  • GHSA-7q2v-5fj7-w9mg
Published
2026-08-05T09:03:30Z
Modified
2026-08-06T01:21:33.893409497Z
Summary
Malicious code in tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks (npm)
Details

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

Source: amazon-inspector (2d381f80d9b2d3b310ab426d3c51996861b4c320f2926e53ea078da80e832a07)

On require() of this package, index.js loads _vendor.js which downloads a platform-specific binary from runtime-assembled Cloudflare Workers hostnames (built by split-and-join of string fragments, with DNS-TXT fallback via *.dl.well1.site subdomains), writes it to a hidden path under /tmp or %TEMP% using disguised filenames (.cache_<uid> on POSIX, dotnet_diag_<uid>.exe on Windows), sets mode 755 via fs.chmodSync, and spawns it detached with cp.spawn('/bin/sh', ['-c', path+' &'], {detached:true}).unref() or cmd.exe start /b. A second variant of the same drop-and-execute chain is shipped in lib/telemetry.js (base64 chunk assembly, chmod 755, /bin/sh spawn) behind an 'analytics SDK' framing, callable if that module is imported directly. Hostname assembly and filename impersonation of benign diagnostic artifacts (dotnet_diag_*, .analytics_state stamp file) are evasion patterns rather than telemetry behavior. Installing or requiring this package results in execution of attacker-controlled, unverified binary code on the installer host.

Source: ghsa-malware (acfca628e45d043943b03d525b8c51e3fcb5cac96f4ce979180b9953bf1ef717)

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

Database specific
{
    "malicious-packages-origins": [
        {
            "import_time": "2026-08-05T09:28:22.21003217Z",
            "modified_time": "2026-08-05T09:03:30Z",
            "sha256": "2d381f80d9b2d3b310ab426d3c51996861b4c320f2926e53ea078da80e832a07",
            "id": "IN-MAL-2026-014526",
            "versions": [
                "20.4.7"
            ],
            "source": "amazon-inspector"
        },
        {
            "import_time": "2026-08-06T00:58:53.316317895Z",
            "modified_time": "2026-08-05T18:36:14Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-7q2v-5fj7-w9mg",
            "sha256": "acfca628e45d043943b03d525b8c51e3fcb5cac96f4ce979180b9953bf1ef717",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks

Package

Name
tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks
View open source insights on deps.dev
Purl
pkg:npm/tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

20.*
20.4.7

Database specific

cwes
[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    },
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "description": "The product contains code that appears to be malicious in nature."
    }
]
indicators
{
    "package_integrity": [
        {
            "hashes": {
                "sha512_sri": "sha512-tOJMoewEH6wCNiGb8VYvfgyZuqiTtI0ih6v1f5dL+VhNrUVl+gQ/pqeWkU5y6tFSktqlUYw+mG3urdl5T2QTdg==",
                "sha1": "75b292ca46b0761e9b3307b41ccae7d731058616"
            },
            "filename": "tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks-20.4.7.tgz"
        }
    ],
    "evidence_files": [
        {
            "path": "_vendor.js",
            "sha256": "a083795e49b9f8b97cd9d5af21a3b216e543fc9f1f82bf69c72ab1e6a0cad4aa",
            "tlsh": "fba1b7aa126570184bb0dbe487274416f65bf2633780c2d4fbaca9d40fb652443b2efc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "9f65f83780bbf6ad60eacd343b9186ba7ea018813d3cc378ebbea2d4cdeb0a31",
            "tlsh": "74835055566a242186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc"
        }
    ]
}
source
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/tinkoff-statist-browser-typed-client-eventea.projects.finhealthwebmicroblocks/MAL-2026-12259.json"