Malicious code in seed-phrase-validator (RubyGems)

{
  "id": "9afe0d96973ec4ebfedb8ad27eddea5b3d752e390338ff07cc635534336ec96f",
  "url": "https://osv.dev/vulnerability/MAL-2026-17794",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in seed-phrase-validator (RubyGems)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (fb8d12a066c24d672bf16efe57267c46c727592ee21beb0e2accb3bb6e4bfb3a) The gem declares a native extension but ships no C/C++/Rust source. extconf.rb exists solely to execute at `gem install` time. It decodes a base64-encoded Ruby payload and runs it via eval inside a detached fork (Process.setsid, randomized sleep of 1200+rand(1200) seconds) so execution survives the install process. The decoded payload opens a TCP socket to the hardcoded bare IP 45.138.12.177:8089 and bridges it to /bin/sh, giving an interactive remote shell on the installer's host. Execution is gated by anti-analysis checks that skip CI runners, ephemeral/sandbox hosts, generated usernames, analysis paths, and low-uptime machines, firing only when developer artifacts such as ~/.ssh, ~/.gitconfig, ~/.npmrc, ~/.gem/credentials, or ~/.bundle are present on the host. Package identity is inconsistent: the gem is named seed-phrase-validator, the README is titled bitcoin-rpc-lite, and the makefile target is bitcoin_rpc_lite_native, with no matching native sources in the tree. ## Source: ossf-package-analysis (260c8de6b9fe5e7e977be76b41bc4f7378162aec30f7ef564a9c1760c1b64344) The OpenSSF Package Analysis project identified 'seed-phrase-validator' @ 0.9.1 (rubygems) as malicious. It is considered malicious because: - The package executes one or more commands associated with malicious behavior.",
    "evidence": "osv:MAL-2026-17794",
    "products": [
      {
        "name": {
          "value": "seed-phrase-validator",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.9.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17794",
      "aliases": [
        "MAL-2026-17794"
      ],
      "affected": [
        {
          "package": {
            "name": "seed-phrase-validator",
            "purl": "pkg:gem/seed-phrase-validator",
            "ecosystem": "RubyGems"
          },
          "versions": [
            "0.9.1"
          ],
          "database_specific": {
            "cwes": [
              {
                "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/rubygems/seed-phrase-validator/MAL-2026-17794.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "ext/seed_phrase_validator/extconf.rb",
                  "tlsh": "9751775acf8359e55aa1c0c045798012faa3ab0a50646875f3ee0868ff59b26c0f12fe",
                  "sha256": "10218e975f54a4f11fe3954e1b584a5f05054003bf5773c3c2b8cceaa74ba763"
                },
                {
                  "path": "metadata.yaml",
                  "tlsh": "4121d3c0e78be836fc04e2f668802247e3e7d20ebd552921d9d783c623c5ab91b07165",
                  "sha256": "040908c7f679de85ab5da8186de07b6157de3a34945d871298d9c867a7eac559"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-13T23:30:06.213000445Z",
      "provider": "osv",
      "references": [
        "https://rubygems.org/gems/seed-phrase-validator/versions/0.9.1"
      ],
      "provider_metadata": {
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021356",
            "sha256": "fb8d12a066c24d672bf16efe57267c46c727592ee21beb0e2accb3bb6e4bfb3a",
            "source": "amazon-inspector",
            "versions": [
              "0.9.1"
            ],
            "import_time": "2026-10-11T14:17:58.83042015Z",
            "modified_time": "2026-10-11T13:46:51Z"
          },
          {
            "sha256": "260c8de6b9fe5e7e977be76b41bc4f7378162aec30f7ef564a9c1760c1b64344",
            "source": "ossf-package-analysis",
            "versions": [
              "0.9.1"
            ],
            "import_time": "2026-10-13T23:14:38.523027353Z",
            "modified_time": "2026-10-11T07:35:30Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 313752,
  "published_at": "2026-10-11T07:35:30+00:00"
}