registry / Remote code execution / devplatform-spa-plugin-ability
devplatform-spa-plugin-ability
Devplatform spa plugin ability SDK for internal consumers
This report shows the evidence for devplatform-spa-plugin-ability@35.5.2, 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-aiThis is a concrete staged payload chain reachable on ordinary import, not a configured telemetry feature. No lifecycle hook is needed because the malicious action runs from the main entrypoint.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any Node process that requires the package entrypoint.
Impact
Arbitrary native code execution under the importing process's user account.
Mechanism
import-time remote payload download, drop, and detached execution
Attack narrative
The declared entrypoint catches and suppresses errors while importing _bootstrap.js. That module fingerprints the platform, downloads a platform-specific executable from rotating obfuscated workers.dev hosts or reconstructs one from DNS TXT records, saves it in a temporary directory, makes it executable on Unix, and launches it detached through /bin/sh or cmd.exe. This is unconsented import-time arbitrary code execution.
AI rationale
This is a concrete staged payload chain reachable on ordinary import, not a configured telemetry feature. No lifecycle hook is needed because the malicious action runs from the main entrypoint.
Evidence
package.jsonindex.js_bootstrap.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random-hex>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random-hex>.exe
Network endpoints8
oob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/package
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- index.js imports _bootstrap.js on every package import.
- _bootstrap.js downloads platform binaries from four obfuscated workers.dev hosts.
- _bootstrap.js falls back to DNS TXT payload retrieval from *.dl.wel1.ru.
- Downloaded bytes are written to a temp file, chmodded, and spawned detached via shell/cmd.
- The bootstrap suppresses errors/output and rate-limits runs with a temp stamp.
Evidence against
- package.json has no lifecycle scripts.
- lib/telemetry.js is not imported by the declared entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading source_bootstrap.jsView file
6const os = require("os");
L7: const https = require("https");
L8:
...
L44: const STAMP_TTL = 19970;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L57: const isWin = _p("platform") === "win32";
L58: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L59: 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.
_bootstrap.jsView on unpkg · L66Trigger-reachable chain: manifest.main -> index.js -> _bootstrap.js
L6: const os = require("os");
L7: const https = require("https");
L8:
...
L44: const STAMP_TTL = 19970;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L57: const isWin = _p("platform") === "win32";
L58: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L59: 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.
_bootstrap.jsView on unpkg · L6Findings
2 Critical2 High3 Medium2 Low
CriticalDownload Execute_bootstrap.js
CriticalTrigger Reachable Dangerous Capability_bootstrap.js
HighChild Process_bootstrap.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to devplatform-spa-plugin-ability@35.5.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-spa-plugin-ability@35.5.2. 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: .
Source advisory published: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.