registry / Remote code execution / checkout-todo-test
checkout-todo-test
test harness
This report shows the evidence for checkout-todo-test@35.5.9, 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 reachable import-time staged binary loader with remote execution, unrelated to the stated test-harness API. The lack of an install hook does not mitigate the concrete runtime execution chain.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of the package main entrypoint.
Impact
Arbitrary remote code executes with the importing process's user privileges.
Mechanism
import-time remote payload download, drop, chmod, and detached execution
Attack narrative
The exported main entrypoint suppresses errors while importing `_platform.js`. That module automatically fetches a platform-specific payload from shuffled Worker hosts, with DNS TXT reconstruction as fallback. On receipt it writes the bytes under a randomized temporary filename, makes it executable on Unix, and launches it detached through a shell or `cmd.exe`.
AI rationale
This is a reachable import-time staged binary loader with remote execution, unrelated to the stated test-harness API. The lack of an install hook does not mitigate the concrete runtime execution chain.
Evidence
package.jsonindex.js_platform.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints7
oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf103-070.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:23 imports _platform on every package import.
- _platform.js:151-160 downloads a >1KB payload over HTTPS or DNS TXT.
- _platform.js:169-175 writes, chmods, and detached-spawns that payload.
- _platform.js:24-43 obfuscates worker and .ru endpoint strings.
- _platform.js:142 creates a cooldown marker before retrieval.
Evidence against
- package.json has no npm lifecycle scripts.
- No credential harvesting is present in the reachable loader.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
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");
...
L117: const _logger = new Logger(
L118: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L119: );
...
L225: "BUILD_NUMBER",
L226: "GITHUB_ACTIONS",
L227: "GITLAB_CI",
...
L276: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L277: device_app_hash: hashString(process.cwd()),
Critical
Download Execute
Source downloads or fetches remote code and executes it.
lib/telemetry.jsView on unpkg · L27491L492: fork() {
L493: const child = new Scope();
High
•matchType = normalized_sha256
matchedPackage = checkout-mobile-input-email@35.6.8
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:35.6.8
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.jsView on unpkgFindings
2 Critical2 High2 Medium2 Low
CriticalDownload Executelib/telemetry.js
CriticalTrigger Reachable Dangerous Capability_platform.js
HighChild Processlib/telemetry.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowWeak Cryptolib/telemetry.js
LowFilesystem
Affected versions and remediation
This report applies to checkout-todo-test@35.5.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-todo-test@35.5.9. 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.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.