{"id":"MAL-2026-3679","summary":"Malicious code in @2oolkit/hyperliquid-cli (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (1c3af30011dcf54950f270463028270d732fce20b5cd5da44342a0748922e6df)\nThe package is advertised as a neutral CLI/MCP wrapper for Hyperliquid, but its distributed code silently routes value from the installer to an author-controlled address. In dist/index.js and dist/mcp.js, the constants BUILDER_ADDRESS = 0xa6f967d47c6f85a5ba4fc43543e5e1c171cccf98, BUILDER_FEE = 1 (0.01%), and REFERRAL_CODE = '2OOLKIT' are hardcoded. On `config init` / `config set --private-key...`, a fire-and-forget `silentAutoSetup(env, privateKey, walletAddress)` signs and submits (a) a `setReferrer('2OOLKIT')` transaction and (b) an `approveBuilderFee(0xa6f9...cf98, '0.1%')` transaction on the user's Hyperliquid account, with errors swallowed so the user sees no indication. Additionally, `HyperliquidClient.placeOrder` unconditionally injects `action.builder = { b: BUILDER_ADDRESS, f: BUILDER_FEE }` into every order, so every trade routed through the CLI pays a builder fee to the hardcoded address in perpetuity. None of this is disclosed in the README or command output, there is no opt-out, and the behavior is triggered by the documented setup flow. This is a silent-relay pattern causing direct, ongoing financial harm to anyone who installs and uses the package with a funded wallet. The repeated POSTs flagged in dist/index.js:610 and dist/mcp.js:466 correspond to the Hyperliquid exchange submissions carrying these hardcoded builder/referrer fields.\n","modified":"2026-05-13T20:21:28.616802Z","published":"2026-05-12T07:42:47Z","database_specific":{"malicious-packages-origins":[{"source":"amazon-inspector","id":"IN-MAL-2026-002224","modified_time":"2026-05-12T19:03:07Z","versions":["0.2.1"],"import_time":"2026-05-13T20:10:54.006616674Z","sha256":"1c3af30011dcf54950f270463028270d732fce20b5cd5da44342a0748922e6df"},{"source":"amazon-inspector","id":"IN-MAL-2026-002225","modified_time":"2026-05-12T19:03:07Z","versions":["0.2.2"],"import_time":"2026-05-13T20:10:54.072521104Z","sha256":"66215e5cdec4c1ec4dfa5fb21237998c57bfbfd96a0bcb9792b92e4c88be3f17"}]},"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/@2oolkit/hyperliquid-cli/v/0.2.1"},{"type":"PACKAGE","url":"https://www.npmjs.com/package/@2oolkit/hyperliquid-cli/v/0.2.2"}],"affected":[{"package":{"name":"@2oolkit/hyperliquid-cli","ecosystem":"npm","purl":"pkg:npm/%402oolkit/hyperliquid-cli"},"versions":["0.2.1","0.2.2"],"database_specific":{"source":"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@2oolkit/hyperliquid-cli/MAL-2026-3679.json","cwes":[{"name":"Embedded Malicious Code","description":"The product contains code that appears to be malicious in nature.","cweId":"CWE-506"},{"name":"Embedded Malicious Code","description":"The product contains code that appears to be malicious in nature.","cweId":"CWE-506"}],"indicators":{"evidence_files":[{"path":"dist/index.js","tlsh":"6653a52075fa212114a3b6ae6b6b81042035f653350cec957becfbd11f9e42689b7f78","sha256":"73cd6941832c612aca22f77edd9c5da8e3bea943be2ba77d3a11538523080292"}],"package_integrity":[{"filename":"hyperliquid-cli-0.2.1.tgz","hashes":{"sha512_sri":"sha512-4NbhUFbpf6OoGv8cYFr3hOsNgMkwp1QFnHp3hChfiLBAKCRFU9zLN+coacxfyiW7PJN9xjkpm+9MD0z8DQkrHw==","sha1":"1a139c96cec462bcf72c21e399097100fb7d6369"}}]}}}],"schema_version":"1.7.5","credits":[{"name":"Amazon Inspector","contact":["actran@amazon.com"],"type":"FINDER"}]}