---
canonical: "https://firewall.lpm.dev/npm/checkout-mobile-cashback"
markdown: "https://firewall.lpm.dev/npm/checkout-mobile-cashback/report.md"
package: "checkout-mobile-cashback"
report_status: "published"
title: "checkout-mobile-cashback@35.4.9 npm security report"
verdict: "malicious"
version: "35.4.9"
---

# checkout-mobile-cashback@35.4.9 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 can execute on the importing user's machine.

- **Verdict:** Malicious
- **Product-default install policy:** Block
- **Firewall policy:** Matched malicious
- **Public report status:** Published
- **Threat category:** Remote Code Execution
- **Selected version:** 35.4.9
- **Selected version is latest:** Yes
- **Analysis source:** AI Security Review (lpm-firewall-ai)

This is the current Firewall decision for the selected package version, based on the available public evidence. Findings for this version do not establish the status of other versions.

AI assessment: malicious; recommendation: publish block. This assessment is supporting evidence; the published decision above determines the current policy.

This is a concrete import-time staged native payload execution chain unrelated to the small advertised SDK API. The bundled telemetry module independently contains the same downloader/launcher pattern, reinforcing intent.

## Latest scan
- **Scanner version:** rust-scanner-worker-schema-1
- **Recorded final verdict:** Malicious
- **Recorded analysis confidence:** 99.0%
- **Started:** 2026-08-05T13:21:55.410Z
- **Finished:** 2026-08-05T13:22:23.762Z
- **Download time:** 255 ms
- **Static scan time:** 30 ms
- **AI review time:** 28067 ms
- **Total time:** 28352 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:** Importing the package silently starts an asynchronous remote payload loader. It downloads or DNS-reconstructs a platform binary, writes it to a temporary directory, and launches it detached.

- **Trigger:** Any require/import of the package main entrypoint.

- **Impact:** Arbitrary attacker-controlled native code can execute on the importing user's machine.

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

- **Review source:** ai\_review

- **Reviewed:** 2026-08-05T13:22:23.762Z

### AI review details

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

- **Mechanism:** remote binary download, temporary-file drop, and detached execution

- **Attack narrative:** The declared main entry catches and imports \_shim.js during normal package import. Its bootstrap contacts shuffled remote hosts for a platform-specific binary, or reconstructs one from DNS TXT records. A sufficiently large response is saved under a disguised random temporary filename, marked executable on non-Windows systems, then launched through a detached shell or cmd.exe process. The marker only rate-limits the behavior; it does not obtain user consent.

- **Rationale:** This is a concrete import-time staged native payload execution chain unrelated to the small advertised SDK API. The bundled telemetry module independently contains the same downloader/launcher pattern, reinforcing intent.

- **Files touched:** index.js, \_shim.js, /tmp/.analytics\_state, /var/tmp/.cache\_\<random\>, %TEMP%/analytics\_state, %TEMP%/dotnet\_diag\_\<random\>.exe

- **Network endpoints:** oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.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 block:** index.js imports \_shim.js on every package import., \_shim.js downloads platform binaries from three remote Worker hosts., \_shim.js falls back to DNS TXT payloads under \*.wel1.ru., Downloaded bytes are written to /var/tmp or Windows temp, chmodded, then detached-spawned via shell., No lifecycle hook is needed: importing the declared main entry triggers bootstrap.

- **Evidence against:** package.json has no lifecycle scripts., No credential or environment-value collection/exfiltration was found.

## Affected versions and remediation

This report applies to checkout-mobile-cashback@35.4.9.

- Avoid installing checkout-mobile-cashback@35.4.9. 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. High: Child Process
- **Category:** Source
- **Confidence:** 85.0%
- **Path:** \_shim.js
- **Public source:** [View source](<https://unpkg.com/checkout-mobile-cashback@35.4.9/_shim.js>)

Package source references child process execution.

Public source snippet (untrusted):

```javascript
L118: try {
L119: const cp = require("child_process");
L120: if (isWin) {
```

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

Package source references network APIs.

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

Package source references environment variables.

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

Package source references filesystem APIs.

### 5. Critical: Download Execute
- **Category:** Source
- **Confidence:** 90.0%
- **Path:** \_shim.js
- **Public source:** [View source](<https://unpkg.com/checkout-mobile-cashback@35.4.9/_shim.js>)

Source downloads or fetches remote code and executes it.

Public source snippet (untrusted):

```javascript
L2: 
L3: const https = require("https");
L4: const path = require("path");
...
L44: const STAMP_TTL = 21457;
L45: const _l = (...a) => process.stderr.write("");
L46: 
...
L56: const isWin = _p("platform") === "win32";
L57: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L58: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L91: try {
L92: require("dns").resolveTxt(d, (e, rr) => {
L93: if (e || !rr || !rr.length) return r("");
```

### 6. Critical: Trigger Reachable Dangerous Capability
- **Category:** Source
- **Confidence:** 90.0%
- **Path:** \_shim.js
- **Public source:** [View source](<https://unpkg.com/checkout-mobile-cashback@35.4.9/_shim.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 -> _shim.js
L2: 
L3: const https = require("https");
L4: const path = require("path");
...
L44: const STAMP_TTL = 21457;
L45: const _l = (...a) => process.stderr.write("");
L46: 
...
L56: const isWin = _p("platform") === "win32";
L57: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L58: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L91: try {
L92: require("dns").resolveTxt(d, (e, rr) => {
L93: if (e || !rr || !rr.length) return r("");
```

### 7. High: Known Malware Source Similarity
- **Category:** Static
- **Confidence:** 95.0%
- **Path:** lib/telemetry.js
- **Public source:** [View source](<https://unpkg.com/checkout-mobile-cashback@35.4.9/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 = token_shingles
matchedPackage = statist-browser-typed-client-hra.workplacer.events@20.9.1
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:20.9.1
similarity = 0.833
shingleOverlap = 40
summary = source token shingles overlapped 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:** checkout-mobile-cashback
- **Ecosystem:** npm
- **Version:** 35.4.9
- **Version published:** 2026-08-05T13:21:10.283Z
- **Package first seen:** 2026-08-05T13:22:23.762Z
- **Package last seen:** 2026-08-05T13:22:23.762Z
- **Known versions:** 1
- **Latest version:** 35.4.9
- **Appeal under review:** No
- **Description:** mobile SDK
- **Artifact files:** 7
- **Artifact unpacked size:** 87,269 bytes
- **Artifact signatures:** 1
- **Attestations:** No

## References
- [HTML security report](<https://firewall.lpm.dev/npm/checkout-mobile-cashback>)