mal-2025-191945
Vulnerability from ossf_malicious_packages
Published
2025-04-20 12:05
Modified
2025-12-11 09:27
Summary
Malicious code in zsender (PyPI)
Details

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

Source: kam193 (64454f4348553cc0321094cffaef685d8977dd95ccf1c07dc54e2b8b3c39a8f0)

Campaign is split into multiple packages that altogether exfiltrates data from desktop Telegram application.

  1. "pyapiepo" is a cover package that provides some useless features BUT also imports "zscaner"
  2. "zscaner", when imported, automatically runs a function that is an entry point to the whole process; it uses the "scan" from "reqinstall" to walk through directories. The package also provides main logic: filtering files, triggering archiving directories and exfiltrating them.
  3. "reqinstall" ensures "requests" are installed and provides a directory tree scanning function.
  4. "zmaker" provides functions to build archives from collected files.
  5. "zsender" provides functions to exfiltrate data, the remote URL and a function to deobfuscate configuration in other packages.

Altogether, they look for "Telegram Desktop" folder, archive user data stored there and exfiltrate to a remote location.


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

Campaign: 2025-04-zscaner

Reasons (based on the campaign):

  • target:telegram

  • exfiltration-generic

  • The malicious code is intentionally included in a dependency of the package


{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "zsender"
      },
      "versions": [
        "1.2.7"
      ]
    }
  ],
  "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": {
      "ips": [
        "77.91.76.45"
      ],
      "urls": [
        "http://77.91.76.45:100/OPEN"
      ]
    },
    "malicious-packages-origins": [
      {
        "id": "pypi/2025-04-zscaner/zsender",
        "import_time": "2025-12-02T22:30:55.798963796Z",
        "modified_time": "2025-04-20T12:05:56Z",
        "ranges": [
          {
            "events": [
              {
                "introduced": "0"
              }
            ],
            "type": "ECOSYSTEM"
          }
        ],
        "sha256": "bbea3884909fc4de5c28947d3ddee545fc4922cc2881a678ed50536a7be365cf",
        "source": "kam193"
      },
      {
        "id": "pypi/2025-04-zscaner/zsender",
        "import_time": "2025-12-02T23:07:18.842422547Z",
        "modified_time": "2025-04-20T12:05:56Z",
        "ranges": [
          {
            "events": [
              {
                "introduced": "0"
              }
            ],
            "type": "ECOSYSTEM"
          }
        ],
        "sha256": "64454f4348553cc0321094cffaef685d8977dd95ccf1c07dc54e2b8b3c39a8f0",
        "source": "kam193"
      },
      {
        "id": "pypi/2025-04-zscaner/zsender",
        "import_time": "2025-12-10T21:38:58.005503987Z",
        "modified_time": "2025-04-20T12:05:56Z",
        "sha256": "d5772de1da404ef7501981ed6bffd40608f3942ba75abb398feab77aa6c350eb",
        "source": "kam193",
        "versions": [
          "1.2.7"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: kam193 (64454f4348553cc0321094cffaef685d8977dd95ccf1c07dc54e2b8b3c39a8f0)\nCampaign is split into multiple packages that altogether exfiltrates data from desktop Telegram application.\n\n1. \"pyapiepo\" is a cover package that provides some useless features BUT also imports \"zscaner\"\n2. \"zscaner\", when imported, automatically runs a function that is an entry point to the whole process; it uses the \"scan\" from \"reqinstall\" to walk through directories. The package also provides main logic: filtering files, triggering archiving directories and exfiltrating them. \n3. \"reqinstall\" ensures \"requests\" are installed and provides a directory tree scanning function.\n4. \"zmaker\" provides functions to build archives from collected files.\n5. \"zsender\" provides functions to exfiltrate data, the remote URL and a function to deobfuscate configuration in other packages.\n\nAltogether, they look for \"Telegram Desktop\" folder, archive user data stored there and exfiltrate to a remote location.\n\n\n---\n\nCategory: MALICIOUS - The campaign has clearly malicious intent, like infostealers.\n\n\nCampaign: 2025-04-zscaner\n\n\nReasons (based on the campaign):\n\n\n - target:telegram\n\n\n - exfiltration-generic\n\n\n - The malicious code is intentionally included in a dependency of the package\n",
  "id": "MAL-2025-191945",
  "modified": "2025-12-11T09:27:54Z",
  "published": "2025-04-20T12:05:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://bad-packages.kam193.eu/pypi/package/zsender"
    }
  ],
  "schema_version": "1.7.4",
  "summary": "Malicious code in zsender (PyPI)"
}


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Sightings

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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