mal-2025-191701
Vulnerability from ossf_malicious_packages
Published
2025-06-09 09:48
Modified
2025-12-11 09:27
Summary
Malicious code in chimera-sandbox-extensions (PyPI)
Details

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

Source: kam193 (9b87170278a2bed3680592ca4efa2d402a56ee044fcfea4b95831e545431a794)

When started, the code attempts to access multiple domains based on the generating algorithm. Once one valid is found, it downloads a script and executes it. The script collects data about the environment (e.g. attempts to get cloud tokens from the metadata URLs, collects some env variables) and sends them further to the remote target, which then decides about next stage code.

It may be targetting https://engineering.grab.com/chimera-sandbox


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

Campaign: 2025-06-chimera-sandbox-extensions

Reasons (based on the campaign):

  • The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.

  • Downloads and executes a remote malicious script.


{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "chimera-sandbox-extensions"
      },
      "versions": [
        "0.1.42"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)"
    },
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "iocs": {
      "domains": [
        "chimerasandbox.workers.dev"
      ]
    },
    "malicious-packages-origins": [
      {
        "id": "pypi/2025-06-chimera-sandbox-extensions/chimera-sandbox-extensions",
        "import_time": "2025-12-02T22:30:55.042168732Z",
        "modified_time": "2025-06-09T09:48:52Z",
        "ranges": [
          {
            "events": [
              {
                "introduced": "0"
              }
            ],
            "type": "ECOSYSTEM"
          }
        ],
        "sha256": "df3188f671b86c3449c0c8f84297a3e7d9cd3ce78ea1bca164a406af9fa61075",
        "source": "kam193"
      },
      {
        "id": "pypi/2025-06-chimera-sandbox-extensions/chimera-sandbox-extensions",
        "import_time": "2025-12-02T23:07:18.05066485Z",
        "modified_time": "2025-06-09T09:48:52Z",
        "ranges": [
          {
            "events": [
              {
                "introduced": "0"
              }
            ],
            "type": "ECOSYSTEM"
          }
        ],
        "sha256": "9b87170278a2bed3680592ca4efa2d402a56ee044fcfea4b95831e545431a794",
        "source": "kam193"
      },
      {
        "id": "pypi/2025-06-chimera-sandbox-extensions/chimera-sandbox-extensions",
        "import_time": "2025-12-10T21:38:57.341498442Z",
        "modified_time": "2025-06-09T09:48:52Z",
        "sha256": "1e89ffb6c4a4ddf1f4b57a300ca231b1e805f3f61c27c2c581b8be6a9c156df5",
        "source": "kam193",
        "versions": [
          "0.1.42"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (9b87170278a2bed3680592ca4efa2d402a56ee044fcfea4b95831e545431a794)\nWhen started, the code attempts to access multiple domains based on the generating algorithm. Once one valid is found, it downloads a script and executes it. The script collects data about the environment (e.g. attempts to get cloud tokens from the metadata URLs, collects some env variables) and sends them further to the remote target, which then decides about next stage code.\n\nIt may be targetting https://engineering.grab.com/chimera-sandbox\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2025-06-chimera-sandbox-extensions\n\n\nReasons (based on the campaign):\n\n\n - The package contains code to exfiltrate basic data from the system, like IP or username. It has a limited risk.\n\n\n - Downloads and executes a remote malicious script.\n",
  "id": "MAL-2025-191701",
  "modified": "2025-12-11T09:27:52Z",
  "published": "2025-06-09T09:48:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://jfrog.com/blog/chimera-sandbox-extensions-malware-threatens-pypi-users/"
    },
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/chimera-sandbox-extensions"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in chimera-sandbox-extensions (PyPI)"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…