Malicious code in perp-funding-rates (RubyGems)

{
  "id": "638c7236bc40fc5674b669a968fab8e4ad978ec8daf0a94fe598110afe8d01b9",
  "url": "https://osv.dev/vulnerability/MAL-2026-17793",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malicious code in perp-funding-rates (RubyGems)",
    "summary": "--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (123418539e0264e9d58c8b51976723aff3eceec10520c231d7bc847edd51d691) The gem's native-extension script ext/perp_funding_rates/extconf.rb contains no real build logic: it declares create_makefile('bitcoin_rpc_lite_native') but ships no C/C++/Rust sources, and the gemspec/library name (perp-funding-rates / PerpFundingRates) does not match the README (bitcoin-rpc-lite) — the extension exists solely to execute code at install time. During `gem install`, extconf.rb base64-decodes a Ruby payload and eval()s it inside a double-forked, detached, delayed child process. The decoded payload opens a TCP socket to the hardcoded bare-IP C2 at 45.138.12.177:8089 and bridges it to /bin/sh, giving the operator an interactive shell on the installer's machine. Execution is gated by sandbox/CI/user/path/uptime heuristics and only triggers when developer-signal files such as ~/.ssh, ~/.gem/credentials, ~/.gitconfig, ~/.npmrc, or ~/.bundle are present on the host, targeting developer workstations and build systems. The base64+eval obfuscation, 20-40 minute sleep before dial-out, double-fork detachment, and cloned-identity cover story are consistent with a targeted developer-compromise dropper, not a legitimate native build. ## Source: ossf-package-analysis (0ce92e6f21307b92f509ec9ac926330b908f989a4fef9078a51f3557790c8167) The OpenSSF Package Analysis project identified 'perp-funding-rates' @ 0.9.1 (rubygems) as m",
    "evidence": "osv:MAL-2026-17793",
    "products": [
      {
        "name": {
          "value": "perp-funding-rates",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "0.9.1",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "MAL-2026-17793",
      "aliases": [
        "MAL-2026-17793"
      ],
      "affected": [
        {
          "package": {
            "name": "perp-funding-rates",
            "purl": "pkg:gem/perp-funding-rates",
            "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/perp-funding-rates/MAL-2026-17793.json",
            "indicators": {
              "evidence_files": [
                {
                  "path": "ext/perp_funding_rates/extconf.rb",
                  "tlsh": "9751775acf8359e55aa1c0c045798012faa3ab0a50646875f3ee0868ff59b26c0f12fe",
                  "sha256": "10218e975f54a4f11fe3954e1b584a5f05054003bf5773c3c2b8cceaa74ba763"
                }
              ]
            }
          }
        }
      ],
      "modified": "2026-10-13T23:30:05.053752931Z",
      "provider": "osv",
      "references": [
        "https://rubygems.org/gems/perp-funding-rates/versions/0.9.1"
      ],
      "provider_metadata": {
        "malicious-packages-origins": [
          {
            "id": "IN-MAL-2026-021364",
            "sha256": "123418539e0264e9d58c8b51976723aff3eceec10520c231d7bc847edd51d691",
            "source": "amazon-inspector",
            "versions": [
              "0.9.1"
            ],
            "import_time": "2026-10-11T14:17:59.524867754Z",
            "modified_time": "2026-10-11T13:48:06Z"
          },
          {
            "sha256": "0ce92e6f21307b92f509ec9ac926330b908f989a4fef9078a51f3557790c8167",
            "source": "ossf-package-analysis",
            "versions": [
              "0.9.1"
            ],
            "import_time": "2026-10-13T23:14:40.397545496Z",
            "modified_time": "2026-10-11T07:05:31Z"
          }
        ]
      }
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 313741,
  "published_at": "2026-10-11T07:05:31+00:00"
}