{"items":[{"id":"NVI-00009881","kind":"supply_chain_event","title":"Malicious code in etheremu.rb (RubyGems)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-r55r-pjq3-j9f4"],"plain_summary":"GitHub lists this malware advisory for etheremu.rb. 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-825bab3466a4c18b56f72c2332109702"],"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-825bab3466a4c18b56f72c2332109702","url":"https://github.com/advisories/GHSA-r55r-pjq3-j9f4","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-r55r-pjq3-j9f4","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T22:07:22.853Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-825bab3466a4c18b56f72c2332109702"],"technology":"etheremu.rb","known_exclusions":[],"conditions_summary":"## Source: amazon-inspector (a82ac5d3f021ab23f4f461181f4150c12d672ef421b6f80c10dd8a307178442e)\nThe gem's extconf.rb, executed automatically during `gem install`, contains a base64-encoded Ruby payload that is decoded and eval'd inside a detached forked process. The payload XOR-decodes a hardcoded bare-IP URL (http://45.138.12.177:8092/wgkit.tar.gz), downloads a tarball to /tmp/.w1.tgz over plain HTTP with no pinning or verification, extracts it, and executes the enclosed wg_install.sh via bash. The accompanying native extension C source is an empty stub whose Init function is a no-op, so the extension exists solely as a vehicle to trigger the dropper at install time. The dropper is wrapped in extensive anti-analysis gating: it exits early if CI environment variables are set, if the hostname matches sandbox/firecracker/vagrant patterns, if the username looks auto-generated or contains strings like 'sandbox', 'tester', 'analys', or 'scanner', if the current working directory is under /tmp, /var/tmp, /opt/rubygems, or /workspace, if machine uptime is under 1800 seconds, or if no developer dot-files are present. It further sleeps 20-40 minutes before firing. Execution is gated on the p","public_affected_ranges":["= 1.0.0"]}],"null_published_at":"2026-10-31T22:13:39.951Z","source_updated_at":"2026-10-06T03:31:22.000Z","source_disclosed_at":"2026-10-05T18:34:14.000Z","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":"2026-10-31T22:07:22.853Z"}],"next_cursor":null,"snapshot_revision":"42594"}