MAL-2026-12698

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-auth-client/MAL-2026-12698.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12698
Aliases
  • GHSA-9p7w-3382-c43r
Published
2026-08-05T13:52:31Z
Modified
2026-08-06T01:20:27.315661123Z
Summary
Malicious code in devplatform-auth-client (npm)
Details

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

Source: amazon-inspector (3b5d92af4e479fded008aa25786634ef3869a37c3624f612a320d308808a0626)

Requiring devplatform-auth-client loads _bootstrap.js, which selects a platform-specific payload URL, downloads opaque bytes over HTTPS from hardcoded Cloudflare workers.dev subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-based fallback to sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru, writes them to /tmp or %TEMP% under decoy names such as .cache_<hex> and dotnet_diag_<hex>.exe, chmods 0755, and spawns them detached via /bin/sh -c or cmd. The destination hostnames and dangerous API names are assembled from split-string fragments joined at runtime to evade static scanners. A sibling lib/telemetry.js module, presented as an analytics SDK, contains a parallel loader that base64-decodes a payload, dynamically resolves chmodSync, and spawns the decoded file. The fetched bytes are unpinned, unverified, and unrelated to any documented publisher.

Source: ghsa-malware (84dec7cc75aa19ce40a478689c787d0a170d2f8f52aea764f4357e1b83e496a0)

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": [
        {
            "modified_time": "2026-08-05T13:52:31Z",
            "source": "amazon-inspector",
            "sha256": "3b5d92af4e479fded008aa25786634ef3869a37c3624f612a320d308808a0626",
            "import_time": "2026-08-05T14:19:59.319688789Z",
            "id": "IN-MAL-2026-015075",
            "versions": [
                "35.2.1"
            ]
        },
        {
            "modified_time": "2026-08-05T17:52:51Z",
            "source": "ghsa-malware",
            "sha256": "84dec7cc75aa19ce40a478689c787d0a170d2f8f52aea764f4357e1b83e496a0",
            "import_time": "2026-08-06T00:58:53.34250463Z",
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-9p7w-3382-c43r"
        }
    ]
}
References
Credits

Affected packages

npm / devplatform-auth-client

Package

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

Affected ranges

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

Affected versions

35.*
35.2.1

Database specific

indicators 
{
    "package_integrity": [
        {
            "filename": "devplatform-auth-client-35.2.1.tgz",
            "hashes": {
                "sha512_sri": "sha512-TfzE2ner0wHKVzEfbBqul0xVy5d5Qv5RguFUU25nD1FA/cQMPJ32/GF85ND6gNJWuMZsJKrYv8I2OkL9P5uVpw==",
                "sha1": "4a1eaaf8daf14d4d2999ea99033c80fca0ccc1e2"
            }
        }
    ],
    "evidence_files": [
        {
            "tlsh": "7ca1b76a156670184b70dbe4c6175416f66bf6637380d2d4fb9c59881fb222883b2efc",
            "sha256": "394fa12218084f413a2e1f6692d1d146b1c7ae2ca1561f68c690cb80892d226d",
            "path": "_bootstrap.js"
        },
        {
            "tlsh": "e0835056566a142186b2b368df234107ff3685272643429dbafc82dc1fbd72092a5ffc",
            "sha256": "56742b02c904b6119ce1dd5218141fc6f1bdb28038d362b7ee5c206ff4b590c9",
            "path": "lib/telemetry.js"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/devplatform-auth-client/MAL-2026-12698.json"
cwes 
[
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    },
    {
        "name": "Embedded Malicious Code",
        "description": "The product contains code that appears to be malicious in nature.",
        "cweId": "CWE-506"
    }
]