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MAL-2026-6735
Vulnerability from ossf_malicious_packages
Published
2026-07-02 21:22
Modified
2026-07-08 17:03
Summary
Malicious code in ue-python-tools (PyPI)
Details

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

Source: amazon-inspector (66a6d9d874ce102a9ac674f8f713472a473007dc3d51adb869c5198afc708751)

On import ue_python_tools, the package spawns a background thread that issues an HTTP POST to http://109.123.247.172/pypi carrying a JSON payload composed of the installer's hostname (socket.gethostname()), user identity (os.environ USER/USERNAME), and current working directory (os.getcwd()). The destination is a hardcoded plaintext bare-IP endpoint with no user consent, no configuration surface, and no documented purpose. The package metadata compounds the risk: it is published as version 99999.0.0 with placeholder author 'Security Research' and summary 'Internal package', a version-squat shape designed to be resolved as the 'latest' release by dependency resolvers and to shadow an internal package name via dependency confusion. Installing or importing this package causes installer host identifiers to be transmitted off-machine to an attacker-controlled endpoint.

Source: kam193 (9494382fb3885f95987ec830f096aac6cde589cac9485b6a347bafed9a8a7e39)

Installing the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.


Category: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research & co, with clearly low-harm possibilities.

Campaign: GENERIC-standard-pypi-install-pentest

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.

  • The package overrides the install command in setup.py to execute malicious code during installation.

CWE
  • CWE-506 - The product contains code that appears to be malicious in nature.

{
  "affected": [
    {
      "database_specific": {
        "cwes": [
          {
            "cweId": "CWE-506",
            "description": "The product contains code that appears to be malicious in nature.",
            "name": "Embedded Malicious Code"
          }
        ],
        "indicators": {
          "evidence_files": [
            {
              "path": "ue_python_tools/__init__.py",
              "sha256": "7eb358daaafe6a4018476ded21c5a429fcd3fbaf9b17376da07f845e266d774b",
              "tlsh": "4901acc6e8345882524b314888258a382227b8572e03a8b47d4cdf7c0fcc46952b56b8"
            },
            {
              "path": "setup.py",
              "sha256": "ca0036e87b4c7ae33dd8a94170de4a40aa68e591c6cba7eff249e9d61d462ad1",
              "tlsh": "d2d097628e4286a08880889e08a038011a29ad373e31b0d8b38043803f8e0dbdf7326d"
            }
          ],
          "package_integrity": [
            {
              "filename": "ue_python_tools-99999.0.0.tar.gz",
              "hashes": {
                "blake2b_256": "0862cc55380bde2e1921c94ca81e8591294c8cf9aa740bb24eec0a70ee726ba5",
                "md5": "a305994038ea26a358688a532a829112",
                "sha256": "393cbfe0970a8a6d575729a098db5b3a280aeab3d806419834fd957065611b72"
              }
            }
          ]
        }
      },
      "package": {
        "ecosystem": "PyPI",
        "name": "ue-python-tools"
      },
      "versions": [
        "99999.0.0"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    },
    {
      "contact": [
        "https://github.com/kam193",
        "https://bad-packages.kam193.eu/"
      ],
      "name": "Kamil Ma\u0144kowski (kam193)",
      "type": "REPORTER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "pypi/GENERIC-standard-pypi-install-pentest/ue-python-tools",
        "import_time": "2026-07-02T21:29:02.677284358Z",
        "modified_time": "2026-07-02T21:22:54.821851Z",
        "sha256": "9494382fb3885f95987ec830f096aac6cde589cac9485b6a347bafed9a8a7e39",
        "source": "kam193",
        "versions": [
          "99999.0.0"
        ]
      },
      {
        "id": "IN-MAL-2026-008129",
        "import_time": "2026-07-08T17:01:32.858284043Z",
        "modified_time": "2026-07-08T16:28:58Z",
        "sha256": "66a6d9d874ce102a9ac674f8f713472a473007dc3d51adb869c5198afc708751",
        "source": "amazon-inspector",
        "versions": [
          "99999.0.0"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (66a6d9d874ce102a9ac674f8f713472a473007dc3d51adb869c5198afc708751)\nOn `import ue_python_tools`, the package spawns a background thread that issues an HTTP POST to http://109.123.247.172/pypi carrying a JSON payload composed of the installer\u0027s hostname (socket.gethostname()), user identity (os.environ USER/USERNAME), and current working directory (os.getcwd()). The destination is a hardcoded plaintext bare-IP endpoint with no user consent, no configuration surface, and no documented purpose. The package metadata compounds the risk: it is published as version 99999.0.0 with placeholder author \u0027Security Research\u0027 and summary \u0027Internal package\u0027, a version-squat shape designed to be resolved as the \u0027latest\u0027 release by dependency resolvers and to shadow an internal package name via dependency confusion. Installing or importing this package causes installer host identifiers to be transmitted off-machine to an attacker-controlled endpoint.\n\n## Source: kam193 (9494382fb3885f95987ec830f096aac6cde589cac9485b6a347bafed9a8a7e39)\nInstalling the package or importing the module exfiltrates basic information about the host, and the package has no other purpose.\n\n\n---\n\nCategory: PROBABLY_PENTEST - Packages looking like typical pentest packages, but also anything that looks like testing, exploring pre-prepared kits, research \u0026 co, with clearly low-harm possibilities.\n\n\nCampaign: GENERIC-standard-pypi-install-pentest\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 - The package overrides the install command in setup.py to execute malicious code during installation.\n",
  "id": "MAL-2026-6735",
  "modified": "2026-07-08T17:03:30Z",
  "published": "2026-07-02T21:22:54Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/ue-python-tools"
    },
    {
      "type": "PACKAGE",
      "url": "https://pypi.org/project/ue-python-tools/99999.0.0/"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in ue-python-tools (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.

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