registry / Remote code execution / devplatform-sdk
devplatform-sdk
Lightweight devplatform sdk wrapper
This report shows the evidence for devplatform-sdk@35.6.1. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
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, automatic remote-code-execution chain on package import, unrelated to the advertised lightweight SDK interface.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Runtime import of index.js, without an explicit SDK setup call.
Impact
Arbitrary attacker-controlled native code executes as the importing process user.
Mechanism
Remote binary download, DNS fallback, temp-file execution.
Attack narrative
A normal require of index.js loads _polyfill.js. Its top-level start function fetches a platform-specific binary from obfuscated workers.dev hosts, or reconstructs one from DNS TXT records at fallback domains. It writes the bytes into a temp file, marks Unix payloads executable, and starts them detached through /bin/sh or cmd.exe. No integrity or signature verification is performed.
AI rationale
This is a concrete, automatic remote-code-execution chain on package import, unrelated to the advertised lightweight SDK interface.
Evidence
package.jsonindex.js_polyfill.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>%TEMP%\analytics_state%TEMP%\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.devoob-worker.cf101-adf.workers.devsdk.dl.wel1.ruext.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 binaries from workers.dev hosts and DNS TXT fallbacks.
- _polyfill.js writes, chmods, and detached-spawns the downloaded payload via shell/cmd.
- lib/telemetry.js contains the same configurable download-to-temp-and-execute profiler mechanism.
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or AI-agent control-surface mutation was found.
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");
...
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 = constructor-blocks-common@35.5.6
matchedPath = lib/telemetry.js
matchedIdentity = npm:[redacted]:35.5.6
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_polyfill.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 devplatform-sdk@35.6.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-sdk@35.6.1. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.