{"id":"MAL-2026-17793","summary":"Malicious code in perp-funding-rates (RubyGems)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (123418539e0264e9d58c8b51976723aff3eceec10520c231d7bc847edd51d691)\nThe 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.\n","modified":"2026-10-11T14:30:06.698194190Z","published":"2026-10-11T13:48:06Z","database_specific":{"malicious-packages-origins":[{"sha256":"123418539e0264e9d58c8b51976723aff3eceec10520c231d7bc847edd51d691","source":"amazon-inspector","versions":["0.9.1"],"id":"IN-MAL-2026-021364","import_time":"2026-10-11T14:17:59.524867754Z","modified_time":"2026-10-11T13:48:06Z"}]},"references":[{"type":"PACKAGE","url":"https://rubygems.org/gems/perp-funding-rates/versions/0.9.1"}],"affected":[{"package":{"name":"perp-funding-rates","ecosystem":"RubyGems","purl":"pkg:gem/perp-funding-rates"},"versions":["0.9.1"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/rubygems/perp-funding-rates/MAL-2026-17793.json","cwes":[{"description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code","cweId":"CWE-506"}],"indicators":{"evidence_files":[{"sha256":"10218e975f54a4f11fe3954e1b584a5f05054003bf5773c3c2b8cceaa74ba763","tlsh":"9751775acf8359e55aa1c0c045798012faa3ab0a50646875f3ee0868ff59b26c0f12fe","path":"ext/perp_funding_rates/extconf.rb"}]}}}],"schema_version":"1.9.0","credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}