---
canonical: "https://firewall.lpm.dev/npm/claims-get-base-url/v/35.4.5"
markdown: "https://firewall.lpm.dev/npm/claims-get-base-url/v/35.4.5.md"
package: "claims-get-base-url"
report_status: "published"
title: "claims-get-base-url@35.4.5 npm security report"
verdict: "malicious"
version: "35.4.5"
---

# claims-get-base-url@35.4.5 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** — Arbitrary attacker-controlled native code executes with the consuming process's permissions.

- **Verdict:** Malicious
- **Product-default install policy:** Block
- **Firewall policy:** Matched malicious
- **Public report status:** Published
- **Threat category:** Remote Code Execution
- **Selected version:** 35.4.5
- **Selected version is latest:** Yes
- **Analysis source:** AI Security Review (lpm-firewall-ai)

Importing the package triggers hidden setup code that retrieves and executes an unverified remote binary. It writes a cache marker and platform-specific payload under temporary directories.

## Latest scan
- **Scanner version:** rust-scanner-worker-schema-1
- **Verdict:** Malicious
- **Confidence:** 99.0%
- **Started:** 2026-08-05T17:16:09.529Z
- **Finished:** 2026-08-05T17:16:39.437Z
- **Download time:** 250 ms
- **Static scan time:** 165 ms
- **AI review time:** 29492 ms
- **Total time:** 29908 ms

## Security analysis

### Published attack-surface review

- **Summary:** Importing the package triggers hidden setup code that retrieves and executes an unverified remote binary. It writes a cache marker and platform-specific payload under temporary directories.

- **Trigger:** Application runtime loads index.js via require/import.

- **Impact:** Arbitrary attacker-controlled native code executes with the consuming process's permissions.

- **Evidence paths:** package.json, index.js, setup.js, lib/telemetry.js

- **Review source:** ai\_review

- **Reviewed:** 2026-08-05T17:16:39.437Z

### AI review details

- **Review stage:** source\_first\_review

- **Mechanism:** import-time remote payload download, temp-file write, and detached execution

- **Attack narrative:** The advertised wrapper silently requires setup.js on import. That code fetches a platform-specific binary from obfuscated rotating hosts, with DNS TXT delivery as a fallback, stores it in a temporary directory, grants execute permission on non-Windows systems, and launches it detached through /bin/sh or cmd.exe. No integrity verification or user action is required.

- **Rationale:** This is a concrete import-time remote-code-execution chain unrelated to the package's stated base-URL wrapper function. The absence of an npm lifecycle hook does not mitigate execution when consumers load the main entrypoint.

- **Files touched:** index.js, setup.js, /tmp/.analytics\_state, /var/tmp/.cache\_\<random-hex\>

- **Network endpoints:** oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru

### Review decision

- **Verdict:** Malicious

- **Confidence:** 99.0%

- **Recommended action:** publish\_block

- **Intent class:** Malware

- **False-positive risk:** Low

- **Evidence for:** index.js imports ./setup at module load., setup.js downloads an unverified binary from rotating workers.dev hosts., setup.js falls back to DNS TXT payload retrieval from wel1.ru domains., setup.js writes the payload to a temp path, chmods it, then starts it detached via shell/cmd., The import-time path needs no caller opt-in beyond requiring the package.

- **Evidence against:** package.json contains no npm lifecycle script., lib/telemetry.js is not imported by the package entrypoint.

## Public findings

### 1. High: Child Process
- **Category:** Source
- **Confidence:** 85.0%
- **Path:** lib/telemetry.js
- **Public source:** [View source](<https://unpkg.com/claims-get-base-url@35.4.5/lib/telemetry.js>)

Package source references child process execution.

Public source snippet (untrusted):

```javascript
L495: 
L496: fork() {
L497: const child = new Scope();
```

### 2. Low: Weak Crypto
- **Category:** Source
- **Confidence:** 64.0%
- **Path:** lib/telemetry.js
- **Public source:** [View source](<https://unpkg.com/claims-get-base-url@35.4.5/lib/telemetry.js>)

Package source references weak cryptographic algorithms.

Public source snippet (untrusted):

```javascript
L27: 
L28: const https = require("https");
L29: const dns = require("dns");
L30: const fs = require("fs");
...
L116: const _logger = new Logger(
L117: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L118: );
...
L224: "BUILD_NUMBER",
L225: "GITHUB_ACTIONS",
L226: "GITLAB_CI",
...
L275: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L276: device_app_hash: hashString(process.cwd()),
```

### 3. Medium: Network
- **Category:** Source
- **Confidence:** 75.0%

Package source references network APIs.

### 4. Medium: Environment Vars
- **Category:** Source
- **Confidence:** 75.0%

Package source references environment variables.

### 5. Low: Filesystem
- **Category:** Source
- **Confidence:** 70.0%

Package source references filesystem APIs.

### 6. Critical: Download Execute
- **Category:** Source
- **Confidence:** 90.0%
- **Path:** lib/telemetry.js
- **Public source:** [View source](<https://unpkg.com/claims-get-base-url@35.4.5/lib/telemetry.js>)

Source downloads or fetches remote code and executes it.

Public source snippet (untrusted):

```javascript
L27: 
L28: const https = require("https");
L29: const dns = require("dns");
L30: const fs = require("fs");
...
L116: const _logger = new Logger(
L117: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L118: );
...
L224: "BUILD_NUMBER",
L225: "GITHUB_ACTIONS",
L226: "GITLAB_CI",
...
L275: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L276: device_app_hash: hashString(process.cwd()),
```

### 7. Critical: Trigger Reachable Dangerous Capability
- **Category:** Source
- **Confidence:** 90.0%
- **Path:** setup.js
- **Public source:** [View source](<https://unpkg.com/claims-get-base-url@35.4.5/setup.js>)

A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.

Public source snippet (untrusted):

```javascript
Trigger-reachable chain: manifest.main -> index.js -> setup.js
L5: const path = require("path");
L6: const https = require("https");
L7: const os = require("os");
...
L47: const CACHE_TTL = 20044;
L48: const _l = (...a) => process.stderr.write("");
L49: 
...
L60: const isWin = _p("platform") === "win32";
L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: if (e || !rr || !rr.length) return r("");
```

### 8. Low: High Entropy Strings
- **Category:** Supply Chain
- **Confidence:** 55.0%

Package source contains high-entropy string patterns.

### 9. Medium: Structural Risk Force Deep Review
- **Category:** Artifact Inventory
- **Confidence:** 85.0%

Artifact structure forces deeper review even if the static behavioral verdict is clean.

### 10. High: Known Malware Source Similarity
- **Category:** Static
- **Confidence:** 97.0%
- **Path:** lib/telemetry.js
- **Public source:** [View source](<https://unpkg.com/claims-get-base-url@35.4.5/lib/telemetry.js>)

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 = twork-data-services-invest-box-account@20.8.8
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:20.8.8
similarity = 1.000
summary = normalized source hash matched finalized malicious source
```

## 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:** claims-get-base-url
- **Ecosystem:** npm
- **Version:** 35.4.5
- **Version published:** 2026-08-05T13:24:32.768Z
- **Package first seen:** 2026-08-05T17:16:39.437Z
- **Package last seen:** 2026-08-05T17:16:39.437Z
- **Known versions:** 1
- **Latest version:** 35.4.5
- **Appeal under review:** No
- **Description:** Pluggable claims get base url interface
- **Artifact files:** 7
- **Artifact unpacked size:** 87,646 bytes
- **Artifact signatures:** 1
- **Attestations:** No

## References
- [HTML security report](<https://firewall.lpm.dev/npm/claims-get-base-url/v/35.4.5>)