mal-2026-3251
Vulnerability from ossf_malicious_packages
Published
2026-05-03 20:58
Modified
2026-05-03 20:58
Summary
Malicious code in puan31 (PyPI)
Details

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

Source: kam193 (27d04731b8fc3968b624ec2435d48b09d1afffb46fefb44745c2c8ff31bf4855)

During import, package automatically starts a connection to a C2 server, exfiltrates information about the host and data like the browser's history and sensitive files, and then waits for remote commands to execute.

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.

  • exfiltration-credentials

  • rat

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

{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "puan31"
      },
      "versions": [
        "0.1.0",
        "0.1.1"
      ]
    }
  ],
  "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/puan31",
        "import_time": "2026-05-03T21:19:17.743722447Z",
        "modified_time": "2026-05-03T20:58:02.468662Z",
        "sha256": "27d04731b8fc3968b624ec2435d48b09d1afffb46fefb44745c2c8ff31bf4855",
        "source": "kam193",
        "versions": [
          "0.1.0",
          "0.1.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (27d04731b8fc3968b624ec2435d48b09d1afffb46fefb44745c2c8ff31bf4855)\nDuring import, package automatically starts a connection to a C2 server, exfiltrates information about the host and data like the browser\u0027s history and sensitive files, and then waits for remote commands to execute.\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 - exfiltration-credentials\n\n\n - rat\n",
  "id": "MAL-2026-3251",
  "modified": "2026-05-03T20:58:02Z",
  "published": "2026-05-03T20:58:02Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/puan31"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in puan31 (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

Author Source Type Date Other

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.



Detection rules are retrieved from Rulezet.