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Malicious code in claudeopusenifile (PyPI)

Type: advisorySources: OSV

--- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (051daf7dfb8c28210996afbf561646b38781f563483e6c2e7471add0a6021885) During installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-09-donutautosellsrc Reasons (based on the campaign): - infostealer - Downloads and executes a remote executable. - obfuscation - The package contains code to detect if it is running in a sandbox environment. - malware - native-extension - steganography - c2-in-blockchain

Products
claudeopusenifile
Affected versions
0.1.3
Fixed versions
Not specified
CVEs
Not specified
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 10:27 UTC · Revision 1

Source evidence

Malicious code in claudeopusenifile (PyPI)

core-osv · Original source

Published 25 Oct 2026, 23:40 UTC

--- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (051daf7dfb8c28210996afbf561646b38781f563483e6c2e7471add0a6021885) During installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-09-donutautosellsrc Reasons (based on the campaign): - infostealer - Downloads and executes a remote executable. - obfuscation - The package contains code to detect if it is running in a sandbox environment. - malware - native-extension - steganography - c2-in-blockchain

osv:MAL-2026-18300

claudeopusenifile

Fixed versions: Not specified

Complete source record
{
  "id": "40e130dc5926795d9c4ea4a1175782a7ff70ff54754f77767ea4bade46f111bd",
  "url": "https://osv.dev/vulnerability/MAL-2026-18300",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in claudeopusenifile (PyPI)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: kam193 (051daf7dfb8c28210996afbf561646b38781f563483e6c2e7471add0a6021885) During installation, obfuscated code is used to fetch code hidden in an image containing a Python application with a native extension module. This module holds an obfuscated infostealer which collects sensitive data and exfiltrates them to a C2 server retrieved from transaction history in the Polygon blockchain. --- Category: MALICIOUS - The campaign has clearly malicious intent, like infostealers. Campaign: 2026-09-donutautosellsrc Reasons (based on the campaign): - infostealer - Downloads and executes a remote executable. - obfuscation - The package contains code to detect if it is running in a sandbox environment. - malware - native-extension - steganography - c2-in-blockchain",
    "evidence": "osv:MAL-2026-18300",
    "products": [
      {
        "name": {
          "value": "claudeopusenifile",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.1.3",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-18300",
      "aliases": [
        "MAL-2026-18300"
      ],
      "affected": [
        {
          "package": {
            "name": "claudeopusenifile",
            "purl": "pkg:pypi/claudeopusenifile",
            "ecosystem": "PyPI"
          },
          "versions": [
            "0.1.3"
          ],
          "database_specific": {
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/claudeopusenifile/MAL-2026-18300.json"
          }
        }
      ],
      "modified": "2026-10-26T01:00:04.471360293Z",
      "provider": "osv",
      "references": [
        "https://www.virustotal.com/gui/file/d03c42c275f0dbc617428441508c49ae1adcbbc95af4eeb094bca4e4f8943f3e/detection",
        "https://polygonscan.com/address/0x9c0a507300fd902787bb193d80fca5ce6e1bff9a",
        "https://bad-packages.kam193.eu/pypi/package/claudeopusenifile"
      ],
      "provider_metadata": {
        "iocs": {
          "urls": [
            "https://thisisafalsepositive.st/cdn/v2/9f4e7a2c1b8d.png",
            "https://thisisafalsepositive.st/cdn/v2/promotion/manifest.json",
            "https://thisisafalsepositive.st/shard/submitData",
            "https://thisisafalsepositive.st/shard/submitLogs",
            "https://thisisafalsepositive.st/shard/submitFile"
          ],
          "domains": [
            "thisisafalsepositive.st",
            "sltnnt.ru"
          ]
        },
        "malicious-packages-origins": [
          {
            "id": "pypi/2026-09-donutautosellsrc/claudeopusenifile",
            "sha256": "051daf7dfb8c28210996afbf561646b38781f563483e6c2e7471add0a6021885",
            "source": "kam193",
            "versions": [
              "0.1.3"
            ],
            "import_time": "2026-10-26T00:47:12.51841174Z",
            "modified_time": "2026-10-25T23:40:43.419704Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 446257,
  "published_at": "2026-10-25T23:40:43+00:00"
}