mal-2026-3244
Vulnerability from ossf_malicious_packages
Published
2026-05-03 12:20
Modified
2026-05-03 21:21
Summary
Malicious code in puan4 (PyPI)
Details

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

Source: kam193 (6be2e7028440f68ad3621664d195d72288e6a1d8658f16a421f3ec52d63d6f7a)

During import, package automatically starts a connection to a C2 server, exfiltrates information about the host and data like sensitive files and browsers' data.

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

Campaign: 2026-05-puan3

Reasons (based on the campaign):

  • exfiltration-generic

  • exfiltration-browser-data

  • The package contains code to execute remote commands (probably limited to a specific set) on the victim's machine.

  • rat

  • exfiltration-credentials

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "puan4"
      },
      "versions": [
        "1.0.3"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "iocs": {
      "ips": [
        "185.246.113.53"
      ]
    },
    "malicious-packages-origins": [
      {
        "id": "pypi/2026-05-puan3/puan4",
        "import_time": "2026-05-03T12:50:01.205148862Z",
        "modified_time": "2026-05-03T12:20:21.680443Z",
        "sha256": "6be2e7028440f68ad3621664d195d72288e6a1d8658f16a421f3ec52d63d6f7a",
        "source": "kam193",
        "versions": [
          "1.0.3"
        ]
      },
      {
        "id": "pypi/2026-05-puan3/puan4",
        "import_time": "2026-05-03T21:19:17.744649084Z",
        "modified_time": "2026-05-03T12:20:21.680443Z",
        "sha256": "a1ede45ed3cdcf9c9f386d9b290d05590e0a8efcc7c0c5e338fd3bd6c0a24aeb",
        "source": "kam193",
        "versions": [
          "1.0.3"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (6be2e7028440f68ad3621664d195d72288e6a1d8658f16a421f3ec52d63d6f7a)\nDuring import, package automatically starts a connection to a C2 server, exfiltrates information about the host and data like sensitive files and browsers\u0027 data.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2026-05-puan3\n\n\nReasons (based on the campaign):\n\n\n - exfiltration-generic\n\n\n - exfiltration-browser-data\n\n\n - The package contains code to execute remote commands (probably limited to a specific set) on the victim\u0027s machine.\n\n\n - rat\n\n\n - exfiltration-credentials\n",
  "id": "MAL-2026-3244",
  "modified": "2026-05-03T21:21:18Z",
  "published": "2026-05-03T12:20:21Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/puan4"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in puan4 (PyPI)"
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.



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