Malicious code in fabtoolkit (PyPI)

{
  "id": "7bd2eec7cc63980223e7cedaae12d6a042f40972cc9670eb6c4a8f8a3f470d81",
  "url": "https://osv.dev/vulnerability/MAL-2026-17927",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in fabtoolkit (PyPI)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (e55333b9d934a04c029943e0e6fbf34fff7c1344e0d1964b6860bc02d322855d) fabtoolkit executes a payload (embedded as a CHILD string run via `subprocess.run([sys.executable,'-I','-c',CHILD],...)`) that fetches a JSON config from https://transfer.archivete.am/H2Uxm/fabdeploycheck-config.json with TLS verification disabled (`ssl._create_unverified_context()`) and dispatches on config-supplied `kind` values: `file` reads arbitrary filesystem paths, `run` executes attacker-supplied argv via subprocess, `http` issues attacker-chosen requests with Bearer tokens chained from previously-read files, `tcp` probes ports, and `revsh` forks a daemon that polls `base+'/'+ident+'-cmd.txt'` and pipes the returned bytes into `/bin/sh -c`, PUTting stdout/stderr back to the same host. Collected file contents, command output, HTTP responses, and probe results are packed into an in-memory zip and PUT to transfer.archivete.am under an attacker-chosen report name. Before daemonizing, the payload walks `/proc/*/cmdline` and SIGKILLs processes whose cmdlines contain `FABDRV3`, `fabdrv2`, or `connection ready`, enforcing single-instance persistence and clearing prior variants. The entry points `python -m fabtoolkit` and any import path reaching `selftest()`/`check()` trigger the payload. The destination is an anonymous public file-transfer host; config-controlled file reads enable harvesting of credentials such as `~/.aws/",
    "evidence": "osv:MAL-2026-17927",
    "products": [
      {
        "name": {
          "value": "fabtoolkit",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.1.2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.1.1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.1.0",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "0.2.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17927",
      "aliases": [
        "MAL-2026-17927"
      ],
      "affected": [
        {
          "package": {
            "name": "fabtoolkit",
            "purl": "pkg:pypi/fabtoolkit",
            "ecosystem": "PyPI"
          },
          "versions": [
            "0.1.2",
            "0.1.1",
            "0.1.0",
            "0.2.1"
          ],
          "database_specific": {
            "cwes": [
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              },
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              },
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              },
              {
                "name": "Embedded Malicious Code",
                "cweId": "CWE-506",
                "description": "The product contains code that appears to be malicious in nature."
              }
            ],
            "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/pypi/fabtoolkit/MAL-2026-17927.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "fabtoolkit/__init__.py",
                  "tlsh": "09e18322981a3472d283e53cac31c9557b56be1b910398717edc9b645fc84b7c0b27ba",
                  "sha256": "518954224d7879e904b0f7fa669c0f7463e7ea0269ed7f0ed50681178bfce0f5"
                }
              ],
              "package_integrity": [
                {
                  "hashes": {
                    "md5": "f6b79c593a351f3e8c9a9a88aedf0de8",
                    "sha256": "1e527bdf3345ce4e7e24091205ef6c84a06508bf5bf83c7bdec48d26b7522b2b",
                    "blake2b_256": "2fec5b2c219bcc8605baf68810edf70577716b20d81e4457a0229ae993b2b6ba"
                  },
                  "filename": "fabtoolkit-0.1.2-py3-none-any.whl"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-20T19:00:04.325366760Z",
      "provider": "osv",
      "references": [
        "https://pypi.org/project/fabtoolkit/0.1.2/",
        "https://pypi.org/project/fabtoolkit/0.1.1/",
        "https://pypi.org/project/fabtoolkit/0.1.0/",
        "https://pypi.org/project/fabtoolkit/0.2.1/"
      ],
      "provider_metadata": {
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021526",
            "sha256": "567b18257d1e8a385129705e40ad51484d1a86491c08c37d8bf192965273cb7b",
            "source": "amazon-inspector",
            "versions": [
              "0.1.2"
            ],
            "import_time": "2026-10-19T02:27:23.818284981Z",
            "modified_time": "2026-10-19T02:26:57Z"
          },
          {
            "id": "IN-MAL-2026-021523",
            "sha256": "7d579abeba93f8d9fe48b53f95a1ba8e45fb4630f19269aca4c5a9149c4bf6cd",
            "source": "amazon-inspector",
            "versions": [
              "0.1.1"
            ],
            "import_time": "2026-10-19T02:27:23.723807383Z",
            "modified_time": "2026-10-19T02:26:31Z"
          },
          {
            "id": "IN-MAL-2026-021525",
            "sha256": "e55333b9d934a04c029943e0e6fbf34fff7c1344e0d1964b6860bc02d322855d",
            "source": "amazon-inspector",
            "versions": [
              "0.1.0"
            ],
            "import_time": "2026-10-19T02:27:23.784650522Z",
            "modified_time": "2026-10-19T02:26:46Z"
          },
          {
            "id": "IN-MAL-2026-021544",
            "sha256": "31bca15e3f2b0d00803862409ca9abe10985158a994449d79348675aa632d76d",
            "source": "amazon-inspector",
            "versions": [
              "0.2.1"
            ],
            "import_time": "2026-10-20T18:46:13.402094306Z",
            "modified_time": "2026-10-20T18:45:02Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 390160,
  "published_at": "2026-10-19T02:26:31+00:00"
}