{
  "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": "ext/hd_wallet_generator/extconf.rb",
              "sha256": "10218e975f54a4f11fe3954e1b584a5f05054003bf5773c3c2b8cceaa74ba763",
              "tlsh": "9751775acf8359e55aa1c0c045798012faa3ab0a50646875f3ee0868ff59b26c0f12fe"
            }
          ]
        },
        "source": "https://github.com/ossf/malicious-packages/blob/main/osv/malicious/rubygems/hd-wallet-generator/MAL-2026-17789.json"
      },
      "package": {
        "ecosystem": "RubyGems",
        "name": "hd-wallet-generator",
        "purl": "pkg:gem/hd-wallet-generator"
      },
      "versions": [
        "0.9.1"
      ]
    }
  ],
  "credits": [
    {
      "contact": [
        "inspector-research@amazon.com"
      ],
      "name": "Amazon Inspector",
      "type": "FINDER"
    },
    {
      "contact": [
        "https://github.com/ossf/package-analysis",
        "https://openssf.slack.com/channels/package_analysis"
      ],
      "name": "OpenSSF: Package Analysis",
      "type": "FINDER"
    }
  ],
  "database_specific": {
    "malicious-packages-origins": [
      {
        "id": "IN-MAL-2026-021349",
        "import_time": "2026-10-11T14:17:58.222601564Z",
        "modified_time": "2026-10-11T13:45:45Z",
        "sha256": "5d6925082b6aa5db29d0569324b4485976add2368c78635d4be5c52270ee3771",
        "source": "amazon-inspector",
        "versions": [
          "0.9.1"
        ]
      },
      {
        "import_time": "2026-10-13T23:14:39.574891917Z",
        "modified_time": "2026-10-11T07:25:28Z",
        "sha256": "c08d2f81c67c979fda86b30b0b5b2beae51023a7cd219c12df286a6c6d9cf6cc",
        "source": "ossf-package-analysis",
        "versions": [
          "0.9.1"
        ]
      }
    ]
  },
  "details": "\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (5d6925082b6aa5db29d0569324b4485976add2368c78635d4be5c52270ee3771)\nThe gem's declared native extension build script ext/hd_wallet_generator/extconf.rb executes a Base64-encoded payload via eval() during `gem install`. The decoded payload opens a TCP socket to the hardcoded remote host 45.138.12.177:8089 and pipes /bin/sh over it (TCPSocket.new + IO.popen(['/bin/sh'],'r+') + IO.copy_stream), granting a remote operator an interactive shell on the installer's host. Execution is wrapped in a double-forked, detached child with a 20–40 minute sleep to decorrelate the connection from the install event. The payload runs only when a battery of evasion checks pass: no CI environment variables, hostname does not match sandbox/firecracker/vagrant/uvm patterns, username does not match generated/analyst patterns (uA\\d+, sandbox, tester, analys, scanner), cwd is not under /tmp or /opt/rubygems, machine uptime exceeds 30 minutes, and developer-signal paths exist on disk (~/.ssh, ~/.gitconfig, ~/.gem/credentials, ~/.bundle, ~/.npmrc). No native source files are shipped; create_makefile is a cover stub so the extension-build pretext never actually builds anything. The package metadata name (hd-wallet-generator) and the README description (bitcoin-rpc-lite) disagree, consistent with a disguised dropper.\n\n## Source: ossf-package-analysis (c08d2f81c67c979fda86b30b0b5b2beae51023a7cd219c12df286a6c6d9cf6cc)\nThe OpenSSF Package Analysis project identified 'hd-wallet-generator' @ 0.9.1 (rubygems) as malicious.\n\nIt is considered malicious because:\n\n- The package executes one or more commands associated with malicious behavior.\n",
  "id": "MAL-2026-17789",
  "modified": "2026-10-13T23:30:06.057913216Z",
  "published": "2026-10-11T07:25:28Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://rubygems.org/gems/hd-wallet-generator/versions/0.9.1"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "Malicious code in hd-wallet-generator (RubyGems)"
}