registry / Remote code execution / devplatform-spa-ui
devplatform-spa-ui
visual components
This report shows the evidence for devplatform-spa-ui@35.8.2, 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 hidden loader is import-reachable and performs unconsented remote binary execution; this is incompatible with the declared UI toolkit function.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any runtime require/import of index.js
Impact
Arbitrary code execution as the importing application's user.
Mechanism
remote payload download, drop, and detached execution
Attack narrative
At module import, index.js silently requires _vendor.js. Its init routine downloads a platform-specific executable from rotating workers.dev hosts or obtains base64 content through DNS TXT records at wel1.ru domains. It writes the payload to a temporary path, marks Unix files executable, and starts it through a detached shell or cmd.exe process.
AI rationale
The hidden loader is import-reachable and performs unconsented remote binary execution; this is incompatible with the declared UI toolkit function.
Evidence
package.jsonindex.js_vendor.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf103-070.workers.devoob-worker.cf101-adf.workers.devoob-worker.cf102-baf.workers.devoob-worker.cf99-9b3.workers.devsdk.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 _vendor.js on every package require.
- _vendor.js downloads platform binaries from worker endpoints.
- _vendor.js falls back to DNS TXT payloads at *.wel1.ru.
- Downloaded bytes are written under /var/tmp or Windows Temp, chmodded, and spawned detached.
- Cache and silent error handling conceal repeated execution.
Evidence against
- package.json contains no lifecycle scripts.
- Public UI API is otherwise minimal and does not need this loader.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
3 flagged · loading source_vendor.jsView file
3const os = require("os");
L4: const https = require("https");
L5: const fs = require("fs");
...
L47: const CACHE_TTL = 22965;
L48: const _l = (...a) => process.stderr.write("");
L49:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L96: try {
L97: require("dns").resolveTxt(d, (e, rr) => {
L98: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_vendor.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _vendor.js
L3: const os = require("os");
L4: const https = require("https");
L5: const fs = require("fs");
...
L47: const CACHE_TTL = 22965;
L48: const _l = (...a) => process.stderr.write("");
L49:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L96: try {
L97: require("dns").resolveTxt(d, (e, rr) => {
L98: 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.
_vendor.jsView on unpkg · L3Findings
2 Critical1 High3 Medium2 Low
CriticalDownload Execute_vendor.js
CriticalTrigger Reachable Dangerous Capability_vendor.js
HighChild Process_vendor.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to devplatform-spa-ui@35.8.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-spa-ui@35.8.2. 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.