MAL-2026-12156

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-chat-transfer/MAL-2026-12156.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12156
Published
2026-08-05T08:46:28Z
Modified
2026-08-05T10:05:56Z
Summary
Malicious code in bigops-chat-transfer (npm)
Details

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

Source: amazon-inspector (1d8d11b7e8abee5caddc5c2f1765fa7f10d40c8cce0ef1cafed55fe31537be94)

On require() of bigops-chat-transfer, platform.js reconstructs one of three Cloudflare workers.dev hostnames from split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), downloads a platform-specific native binary over HTTPS, and — if HTTPS fails — falls back to a DNS-TXT covert channel under *.dl.wel1.ru that reconstructs a base64-encoded binary from sequentially numbered TXT records. The downloaded bytes are written to /var/tmp/.cache on Unix or %TEMP%/dotnet_diag_.exe on Windows, chmod 0755'd, and spawned detached via /bin/sh -c or cmd /c start. A.analytics_state lock file provides rate-limit persistence, and the naming (dotnet_diag, analytics_state) is a cover story masquerading as.NET diagnostics telemetry. Destination hosts are not the package publisher's infrastructure, the fetched executable is opaque and unverified, and execution is triggered by ordinary import of the module.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-014411",
            "import_time": "2026-08-05T09:28:08.035506578Z",
            "modified_time": "2026-08-05T08:46:28Z",
            "sha256": "1d8d11b7e8abee5caddc5c2f1765fa7f10d40c8cce0ef1cafed55fe31537be94",
            "source": "amazon-inspector",
            "versions": [
                "35.3.6"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / bigops-chat-transfer

Package

Name
bigops-chat-transfer
View open source insights on deps.dev
Purl
pkg:npm/bigops-chat-transfer

Affected ranges

Affected versions

35.*
35.3.6

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": "_platform.js",
            "sha256": "51f03e9e7970bf053a490f07d2764a15e55d853c7ed8d2384ec53b92fb27f306",
            "tlsh": "fea1879e166a70194bb097e4c72b4816f65bf2633380d2d4fa5ca5941fb31248371efc"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigops-chat-transfer-35.3.6.tgz",
            "hashes": {
                "sha1": "797b8708f3536696d4584b78223087b1e389f1e1",
                "sha512_sri": "sha512-U3oE+zz2lGVbEpxXGoyWuWGkPmg03JBMpjKR/3LB0lLWvgPSRaEI4D/bz6rXE2MwJiz6c468et4Pr4aUoekt4A=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-chat-transfer/MAL-2026-12156.json"