registry / Remote code execution / checkout-desktop-bnpl
checkout-desktop-bnpl
Reusable checkout desktop bnpl components
This report shows the evidence for checkout-desktop-bnpl@35.5.1, the only known version.
This package appears in our research on the August 2026 dependency confusion campaign, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThis is a concrete import-time remote-code-execution chain unrelated to the stated checkout component functionality. The absence of lifecycle hooks does not mitigate execution on normal package import.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Runtime import/require of the package main entrypoint.
Impact
Arbitrary code execution under the importing process user.
Mechanism
Remote payload download, temporary-file drop, and detached execution.
Attack narrative
Requiring index.js silently requires _polyfill.js, which immediately calls start(). It fetches a platform-specific payload from obfuscated Workers hosts, falling back to DNS TXT-delivered base64 data. Payloads over 1000 bytes are saved under /var/tmp or the Windows temp directory, made executable on Unix, and launched detached through /bin/sh or cmd.exe. There is no integrity verification or user action.
AI rationale
This is a concrete import-time remote-code-execution chain unrelated to the stated checkout component functionality. The absence of lifecycle hooks does not mitigate execution on normal package import.
Evidence
package.jsonindex.js_polyfill.jslib/telemetry.js
Network endpoints8
oob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packagesdk.dl.wel1.ruext.dl.wel1.rupkg.dl.wel1.runet.dl.wel1.ru
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports _polyfill.js on every package import.
- _polyfill.js downloads platform-specific payloads from hidden worker hosts or DNS TXT records.
- _polyfill.js writes the payload to a temp path, chmods it on Unix, then detached-spawns it via shell/cmd.
Evidence against
- package.json has no lifecycle scripts.
- The exported CheckoutDesktopBnpl class itself is minimal and benign.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
5 flagged · loading sourcelib/telemetry.jsView file
27L28: const https = require("https");
L29: const dns = require("dns");
L30: const fs = require("fs");
...
L121: const _logger = new Logger(
L122: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L123: );
...
L229: "BUILD_NUMBER",
L230: "GITHUB_ACTIONS",
L231: "GITLAB_CI",
...
L280: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L281: device_app_hash: hashString(process.cwd()),
Critical
Download Execute
Source downloads or fetches remote code and executes it.
lib/telemetry.jsView on unpkg · L27495L496: fork() {
L497: const child = new Scope();
High
•matchType = normalized_sha256
matchedPackage = tinkoff-fb-app-frame-page-height-dippy@20.8.4
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:20.8.4
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.
lib/telemetry.jsFindings
2 Critical2 High3 Medium3 Low
CriticalDownload Executelib/telemetry.js
CriticalTrigger Reachable Dangerous Capability_polyfill.js
HighChild Processlib/telemetry.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowWeak Cryptolib/telemetry.js
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to checkout-desktop-bnpl@35.5.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-desktop-bnpl@35.5.1. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.