MAL-2026-12625

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/claims-historical-claims-domain/MAL-2026-12625.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12625
Published
2026-08-05T14:03:16Z
Modified
2026-08-05T14:35:55Z
Summary
Malicious code in claims-historical-claims-domain (npm)
Details

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

Source: amazon-inspector (821551bfee1b6a8fa74b001808fad75327d22654f228600f02a6130edc31ce2e)

On require, index.js loads bridge.js which selects a platform-specific URL path and downloads a binary via https.get from hostnames assembled by string-splitting fragments such as 'oob-worker.cf*-.workers.dev', with a DNS TXT-record base64 fallback under '.dl.wel1.ru'. The fetched bytes are written to a temp file under a masquerading name (dotnet_diag.exe on Windows,.cache_ on Unix), chmodded 0755, and spawned detached via /bin/sh -c or cmd. No hash or signature verification is performed. A freshness marker file named 'analytics_state' gates re-runs to roughly once per six hours, and code comments frame the behavior as 'telemetry'/'analytics'. Host destinations and artifact names are obfuscated via array-join string splitting to defeat literal-string scanning.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-015145",
            "import_time": "2026-08-05T14:20:06.816974558Z",
            "modified_time": "2026-08-05T14:03:16Z",
            "sha256": "821551bfee1b6a8fa74b001808fad75327d22654f228600f02a6130edc31ce2e",
            "source": "amazon-inspector",
            "versions": [
                "35.4.4"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / claims-historical-claims-domain

Package

Name
claims-historical-claims-domain
View open source insights on deps.dev
Purl
pkg:npm/claims-historical-claims-domain

Affected ranges

Affected versions

35.*
35.4.4

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": "_bridge.js",
            "sha256": "475597cb2dec5ca1de0006f854b86a7c1a7974810d9665b5fb4c9809b49bed0f",
            "tlsh": "96a1965a12a670198bb0d7e48b175416f65be6733380c2d4f79ca5580f7762483b2efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "claims-historical-claims-domain-35.4.4.tgz",
            "hashes": {
                "sha1": "c527d1373f5cc7e94fa603228d9478009b42cf2f",
                "sha512_sri": "sha512-TeccRsUuE/zuUbPYa9sf5rTWfgDWAFk0suN2GnZh9zlNM4Xxt29zVtB+JJRleooQJKFq+Fu07zn0xYN66pe+Tw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/claims-historical-claims-domain/MAL-2026-12625.json"