registry / Remote code execution / devplatform-spa-devtools
devplatform-spa-devtools
Devplatform spa devtools SDK for internal consumers
This report shows the evidence for devplatform-spa-devtools@35.2.6, 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-aiThe package’s documented wrapper has no legitimate need to execute opaque remote binaries on import. The behavior is concrete, automatic, stealthy, and provides remote code execution.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any application runtime that requires index.js.
Impact
Remote operator-controlled native code execution as the importing process user.
Mechanism
Import-time remote payload download, drop, chmod, and detached execution.
Attack narrative
A normal require of the package silently loads _runtime.js. Its setup routine contacts hard-coded, obfuscated hosts for an OS-specific opaque binary, with DNS TXT reconstruction as fallback. When a payload exceeds 1 KB, it is dropped into a temporary directory, chmodded on Unix, and launched through a detached shell or cmd.exe process. The same loader pattern also appears in the unreferenced telemetry file.
AI rationale
The package’s documented wrapper has no legitimate need to execute opaque remote binaries on import. The behavior is concrete, automatic, stealthy, and provides remote code execution.
Evidence
package.jsonindex.js_runtime.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf103-070.workers.devoob-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 _runtime on every package import.
- _runtime.js downloads platform payloads from obfuscated workers.dev hosts.
- DNS TXT fallback reconstructs base64 payloads from wel1.ru domains.
- Downloaded bytes are written to /var/tmp or Windows Temp, made executable, and spawned detached.
- No lifecycle hook is needed: ordinary require() triggers setup().
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or direct data exfiltration was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_runtime.jsView file
2L3: const https = require("https");
L4: const path = require("path");
...
L45: const CACHE_TTL = 20525;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L92: try {
L93: require("dns").resolveTxt(d, (e, rr) => {
L94: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_runtime.jsView on unpkg · L22Trigger-reachable chain: manifest.main -> index.js -> _runtime.js
L2:
L3: const https = require("https");
L4: const path = require("path");
...
L45: const CACHE_TTL = 20525;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L92: try {
L93: require("dns").resolveTxt(d, (e, rr) => {
L94: if (e || !rr || !rr.length) return r("");
Critical
Trigger Reachable Dangerous Capability
A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.
_runtime.jsView on unpkg · L2122
Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_runtime.js
CriticalTrigger Reachable Dangerous Capability_runtime.js
HighChild Process_runtime.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to devplatform-spa-devtools@35.2.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-spa-devtools@35.2.6. 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.