MAL-2026-12841

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-telephony-client/MAL-2026-12841.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12841
Aliases
  • GHSA-g9wv-gq84-hc44
Published
2026-08-05T15:00:32Z
Modified
2026-08-06T01:19:58Z
Summary
Malicious code in bigops-telephony-client (npm)
Details

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

Source: amazon-inspector (98fd12faa59a5e65d0383cfb3be55ccd49beca5c74cb350b62f5717be83bcd65)

On require() of bigops-telephony-client, index.js loads./runtime.js, which unconditionally downloads a platform-specific binary over HTTPS from Cloudflare Workers hosts whose domains are reconstructed by joining split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev, oob-worker.cf103-070.workers.dev). The downloaded bytes are written to a disguised location under /tmp or %TEMP% (e.g..cache, dotnet_diag_.exe mimicking a.NET diagnostic tool), chmod 0755, and spawned detached via /bin/sh -c or cmd /c start. A fallback code-delivery channel resolves DNS TXT records at sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru, using 'c.' to obtain a chunk count and '0.'..'N.' to reassemble a base64-encoded payload. lib/telemetry.js ships a parallel drop-and-execute implementation (WorkerHost/NativeProfiler under an 'Analytics SDK' cover story) with the same primitives, currently unreferenced by the main entry. The combination of split-string domain construction, DNS-TXT covert channel, disguised drop paths, detached spawn, and duplicate loader is a supply-chain dropper delivering arbitrary attacker-controlled code to every consumer.

Source: ghsa-malware (03ae4ba0015fe097b23ccecbae0ccf162a47214827bc3dba909e3627fe12bade)

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": [
        {
            "id": "IN-MAL-2026-015531",
            "import_time": "2026-08-05T15:19:56.3774839Z",
            "modified_time": "2026-08-05T15:00:32Z",
            "sha256": "98fd12faa59a5e65d0383cfb3be55ccd49beca5c74cb350b62f5717be83bcd65",
            "source": "amazon-inspector",
            "versions": [
                "35.7.6"
            ]
        },
        {
            "id": "GHSA-g9wv-gq84-hc44",
            "import_time": "2026-08-06T00:58:53.372882691Z",
            "modified_time": "2026-08-05T18:41:44Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "03ae4ba0015fe097b23ccecbae0ccf162a47214827bc3dba909e3627fe12bade",
            "source": "ghsa-malware"
        }
    ]
}
References
Credits

Affected packages

npm / bigops-telephony-client

Package

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

Affected ranges

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

Affected versions

35.*
35.7.6

Database specific

cwes 
[
    {
        "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.",
        "name": "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "_runtime.js",
            "sha256": "ecd3f5355a6a38a5959b45b05609d534da903b85bb2cf93517e2adca7d1d80bd",
            "tlsh": "53a1869606ab30198bb0d7e487175419f65ef6533781c288fb9ca9984f72124c3b2dfc"
        },
        {
            "path": "lib/telemetry.js",
            "sha256": "40b7636658ebecb18227da08af663c69028ecfa1816aaa4c7ccb01364feb2106",
            "tlsh": "d7835055566a202186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffd"
        }
    ],
    "package_integrity": [
        {
            "filename": "bigops-telephony-client-35.7.6.tgz",
            "hashes": {
                "sha1": "6f68f531446d2c7d4851b03300db10bc84c6aba4",
                "sha512_sri": "sha512-XhlHbMJWTrMQFvJNDNL4C44854qFrXLGvvuk8j0vh+6B9+6erbngu07TBTVqtyOYSd1cUamffo5Ym2hG7EONMg=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/bigops-telephony-client/MAL-2026-12841.json"