MAL-2026-17572

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkmate-remediation-assistant/MAL-2026-17572.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-17572
Published
2026-10-05T09:02:39Z
Modified
2026-10-07T06:30:05Z
Summary
Malicious code in checkmate-remediation-assistant (npm)
Details

checkmate-remediation-assistant@1.0.0 contains no functional code: its only behaviour is a preinstall script that runs node index.js on npm install. index.js collects the install directory, the user's home directory, hostname, username and DNS servers, and the full contents of /etc/passwd and /etc/hosts, then sends them as JSON in an HTTPS POST to 9q0lp9mr6ek7nrnklhzkmbpuglmda4yt.oastify.com, a Burp Collaborator endpoint. The npm account testneo7755 published it on 2026-10-05 and it was unpublished about two minutes later; the same account published with-cte the same day with the same index.js and a different Collaborator subdomain.

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

Source: amazon-inspector (c8f55d0ebeea19e228ec6edbb1782df87539c476478d3935559fda90a458b1b4)

The package's package.json declares a preinstall hook that runs index.js on npm install. index.js collects os.hostname(), os.userInfo(), the home directory, DNS server configuration, __dirname, the local package.json, and the contents of /etc/passwd and /etc/hosts, then transmits the collected data over HTTPS to a hardcoded Burp Collaborator (oastify.com) subdomain (9q0lp9mr6ek7nrnklhzkmbpuglmda4yt.oastify.com). The destination is an out-of-band interaction server not associated with any declared publisher or documented package purpose, and the exfiltration fires automatically on default install without user interaction.

Database specific 
{
    "iocs":  {
        "domains":  [
            "9q0lp9mr6ek7nrnklhzkmbpuglmda4yt.oastify.com"
        ],
        "files":  [
            {
                "digests":  {
                    "sha256":  "2a7881b42271bb9aa87855e0af958857c1b6acaa670150481baef0847dd78f43"
                },
                "note":  "preinstall script runs `node index.js`.",
                "paths":  [
                    "package.json"
                ],
                "source":  "PACKAGE_ARCHIVE"
            },
            {
                "digests":  {
                    "sha256":  "c3b9a6b9837af57b17acac41d279a905d70365d3d9e57284c8c217b7508d78ca"
                },
                "note":  "Executed by the preinstall script of checkmate-remediation-assistant@1.0.0.",
                "paths":  [
                    "index.js"
                ],
                "source":  "PACKAGE_ARCHIVE"
            }
        ],
        "urls":  [
            "https://9q0lp9mr6ek7nrnklhzkmbpuglmda4yt.oastify.com/"
        ]
    },
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-021081",
            "import_time":  "2026-10-05T16:22:57.119740865Z",
            "modified_time":  "2026-10-05T16:15:03Z",
            "sha256":  "c8f55d0ebeea19e228ec6edbb1782df87539c476478d3935559fda90a458b1b4",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / checkmate-remediation-assistant

Package

Name
checkmate-remediation-assistant
View open source insights on deps.dev
Purl
pkg:npm/checkmate-remediation-assistant

Affected ranges

Affected versions

1.*
1.0.0

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":  "index.js",
            "sha256":  "c3b9a6b9837af57b17acac41d279a905d70365d3d9e57284c8c217b7508d78ca",
            "tlsh":  "5d412395a2c917330dd210c06a1c70843359fa777269a8d076cf42969f869f8b7326f3"
        }
    ],
    "package_integrity":  [
        {
            "filename":  "checkmate-remediation-assistant-1.0.0.tgz",
            "hashes":  {
                "sha1":  "1116b68d5c21ed65ff06b2edc7dfad7181636bf7",
                "sha512_sri":  "sha512-Svgam2vzDqxOjZDANOlRGP+NDkxy6eyoq3NGdsJt2sUH+9YYxgnL8cxwM5DZG6T86bcT5JUS1tbJtHIYrCIrLw=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/checkmate-remediation-assistant/MAL-2026-17572.json"