mal-2026-2519
Vulnerability from ossf_malicious_packages
Published
2026-04-09 07:28
Modified
2026-04-09 08:40
Summary
Malicious code in just4testlm (PyPI)
Details

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

Source: kam193 (5aed012f2ecc4af261bb7f2fc294b9aee5c0733ccf207b9e9e9a381d51387811)

The package likely tests different malicious techniques and delivering payload in setup.py. Different versions, like 0.1.0, 0.4.0 or 0.9.0 contain malicious payload in setup.py that either run remote script or exfiltrate env variables during installation. The malicious versions are also quickly removed and replaced with versions without malicious code.

Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers.

Campaign: 2026-03-just4testlm

Reasons (based on the campaign):

  • Downloads and executes a remote malicious script.

  • exfiltration-env-variables

Credits
Kamil Mańkowski (kam193) github.com/kam193 bad-packages.kam193.eu/
Kamil Mańkowski (kam193) github.com/kam193 bad-packages.kam193.eu/
To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "just4testlm"
      },
      "versions": [
        "0.1.0",
        "0.2.0",
        "0.3.0",
        "0.4.0",
        "0.5.0",
        "0.6.0",
        "0.7.0",
        "0.8.0",
        "0.9.0",
        "0.9.1",
        "0.9.2",
        "0.9.3"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "ANALYST"
    },
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "iocs": {
      "domains": [
        "just4testlm.tos-cn-hongkong.volces.com",
        "pipi.8d90982c.cdn.cloudops.ink",
        "cloudops.ink"
      ],
      "urls": [
        "https://just4testlm.tos-cn-hongkong.volces.com/run.sh"
      ]
    },
    "malicious-packages-origins": [
      {
        "id": "pypi/GENERIC-questionable-pentest/just4testlm",
        "import_time": "2026-04-09T07:42:34.161539179Z",
        "modified_time": "2026-04-09T07:28:56.971481Z",
        "sha256": "512c9983d4d153d1cf4bae9fffbddc13d5a5f58573dd4ea042dca9e43cac964b",
        "source": "kam193",
        "versions": [
          "0.1.0",
          "0.2.0",
          "0.3.0",
          "0.4.0",
          "0.5.0",
          "0.6.0",
          "0.7.0",
          "0.8.0",
          "0.9.0",
          "0.9.1",
          "0.9.2"
        ]
      },
      {
        "id": "pypi/2026-03-just4testlm/just4testlm",
        "import_time": "2026-04-09T08:38:22.247537267Z",
        "modified_time": "2026-04-09T08:22:13.143434Z",
        "sha256": "5aed012f2ecc4af261bb7f2fc294b9aee5c0733ccf207b9e9e9a381d51387811",
        "source": "kam193",
        "versions": [
          "0.1.0",
          "0.2.0",
          "0.3.0",
          "0.4.0",
          "0.5.0",
          "0.6.0",
          "0.7.0",
          "0.8.0",
          "0.9.0",
          "0.9.1",
          "0.9.2",
          "0.9.3"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (5aed012f2ecc4af261bb7f2fc294b9aee5c0733ccf207b9e9e9a381d51387811)\nThe package likely tests different malicious techniques and delivering payload in setup.py. Different versions, like 0.1.0, 0.4.0 or 0.9.0 contain malicious payload in setup.py that either run remote script or exfiltrate env variables during installation. The malicious versions are also quickly removed and replaced with versions without malicious code.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-03-just4testlm\n\n\nReasons (based on the campaign):\n\n\n - Downloads and executes a remote malicious script.\n\n\n - exfiltration-env-variables\n",
  "id": "MAL-2026-2519",
  "modified": "2026-04-09T08:40:08Z",
  "published": "2026-04-09T07:28:17Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/just4testlm"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in just4testlm (PyPI)"
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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