{"items":[{"id":"NVI-00011120","kind":"supply_chain_event","title":"Malicious code in studiocode_eligibility (npm)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-chvh-489x-9963"],"plain_summary":"GitHub lists this malware advisory for studiocode_eligibility. 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-dbe4cce798301e9dee37e8712a24ac08"],"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-dbe4cce798301e9dee37e8712a24ac08","url":"https://github.com/advisories/GHSA-chvh-489x-9963","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-chvh-489x-9963","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:05.881Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-dbe4cce798301e9dee37e8712a24ac08"],"technology":"studiocode_eligibility","known_exclusions":[],"conditions_summary":"## Source: amazon-inspector (a49b1af8bbf0463bb38d3049e59c28b0dcc8d2e3e5ef54611b4e77bddfdd36dc)\npackage.json declares a postinstall hook `wscript.exe 4444.vbs` that automatically executes a 765KB VBScript shipped in the tarball on Windows installers. The VBS contains multi-layer obfuscation (XOR-decoded AES S-boxes, SHA-256 constants, a ChaCha20 stream layer, and a large Base64 'ArtifactBundleHX' blob) that decrypts a PowerShell loader, writes it to %TEMP%\\pf#####.dat, and invokes it via powershell.exe using process-hollowing-style techniques. The library source (src/index.js) is a small Zod-based email-domain eligibility checker that is unrelated to the VBS payload and serves as cover. The README explicitly claims 'Checks run locally, without network requests' and 'There are no installation scripts', directly contradicting the declared postinstall hook and shipped dropper. Running `npm install studiocode_eligibility` on Windows grants the package author arbitrary code execution on the installer's machine.\n\n---\n\nCredit: OpenSSF ([source](https://github.com/ossf/malicious-packages/blob/ae1ef40954ea15dd560720d58f647c9880afc699/osv/maliciou","public_affected_ranges":["= 1.0.1"]}],"null_published_at":"2026-10-31T23:18:22.433Z","source_updated_at":"2026-10-05T00:30:42.000Z","source_disclosed_at":"2026-10-05T00:30:38.000Z","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":"2026-10-31T23:13:05.881Z"}],"next_cursor":null,"snapshot_revision":"42594"}