registry / Remote code execution / devplatform-spa-di
devplatform-spa-di
Reusable devplatform spa di components
This report shows the evidence for devplatform-spa-di@35.5.8, 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, automatically reachable remote binary staging and execution chain concealed behind an unrelated DI package API. The absence of lifecycle scripts does not mitigate import-time execution.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any require/import of devplatform-spa-di
Impact
Remote code execution in the importing user's process context.
Mechanism
import-time remote payload download, staging, and detached execution
Attack narrative
On ordinary package import, index.js suppresses errors while loading _polyfill.js. That module selects an OS payload endpoint, fetches binary data from obfuscated workers.dev hosts or reconstructs it through DNS TXT records, writes it under an innocuous temporary filename, marks it executable on Unix, and starts it detached via /bin/sh or cmd.exe. The code includes a timestamp marker only to limit repeat execution, not to obtain consent.
AI rationale
This is a concrete, automatically reachable remote binary staging and execution chain concealed behind an unrelated DI package API. The absence of lifecycle scripts does not mitigate import-time execution.
Evidence
package.jsonindex.js_polyfill.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>TEMP\analytics_stateTEMP\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packagesdk.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 fetches platform-specific binaries from hidden workers.dev hosts.
- _polyfill.js can reconstruct a payload from DNS TXT records under wel1.ru.
- _polyfill.js writes the payload to /var/tmp or TEMP, chmods it, then launches it detached through a shell.
- The download-and-execute path is automatic unless opt-out environment variables are set.
- lib/telemetry.js contains the same remote native-profiler download, write, and detached-launch mechanism.
Evidence against
- package.json has no lifecycle scripts.
- The exported DI API itself is minimal; the malicious behavior is hidden in the import-time sidecar.
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");
...
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()),
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 = claims-patch-url@35.3.9
matchedPath = lib/telemetry.js
matchedIdentity = npm:Y2xhaW1zLXBhdGNoLXVybA:35.3.9
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-spa-di@35.5.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-spa-di@35.5.8. 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.