{"items":[{"id":"NVI-00009687","kind":"supply_chain_event","title":"Malicious code in multichain-rpc (RubyGems)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hh53-qgqp-j52v"],"plain_summary":"GitHub lists this malware advisory for multichain-rpc. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-2c522f7f92044a27bea4d48d4d88d2e7"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-2c522f7f92044a27bea4d48d4d88d2e7","url":"https://github.com/advisories/GHSA-hh53-qgqp-j52v","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hh53-qgqp-j52v","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:06:53.250Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2c522f7f92044a27bea4d48d4d88d2e7"],"technology":"multichain-rpc","known_exclusions":[],"conditions_summary":"## Source: amazon-inspector (b5765482ebcff5ac393edb3ce06164e7c697a00aa7e32c92b1272dc20184b424)\nThe gem's extconf.rb, executed automatically by `gem install` as a native-extension build step, base64-decodes a Ruby payload and runs it via `eval` inside a double-forked, stdio-detached background process. The payload opens a TCP socket to the hardcoded host 45.138.12.177 on port 8089 and bridges it to `/bin/sh`, giving the remote operator an interactive shell on the installer's machine. Execution is gated by developer-host heuristics (presence of ~/.ssh, ~/.gitconfig, ~/.npmrc, ~/.gem/credentials, ~/.bundle, uptime > 1800s) and explicit anti-analysis checks that skip CI, ephemeral, generated-user, and sandbox environments, with a 20-40 minute delay before firing. The rest of the gem is cover: lib/multichain_rpc.rb exports only stub methods (`build_id` returning 'ok', `healthy?` returning true), the README advertises an unrelated name (`bitcoin-rpc-lite`), and extconf.rb declares a native extension (`create_makefile('bitcoin_rpc_lite_native')`) but ships no C sources, so the file's sole purpose is to run the embedded payload. Installing the gem on a developer workstation yields a full-h","public_affected_ranges":["= 0.9.1"]}],"null_published_at":"2026-10-31T22:13:39.929Z","source_updated_at":"2026-10-11T15:31:25.000Z","source_disclosed_at":"2026-10-11T15:31:13.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T22:06:53.250Z"}],"next_cursor":null,"snapshot_revision":"42594"}