registry / Remote code execution / devplatform-nx-devkit
devplatform-nx-devkit
Devplatform nx devkit runtime support module
This report shows the evidence for devplatform-nx-devkit@35.8.5, 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 benign exported class is paired with an unconditional import-time downloader/executor. The remote opaque binary is neither package-aligned nor integrity-verified despite a misleading comment.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any require/import of the package main entrypoint.
Impact
Unconsented arbitrary native code execution under the importing process user.
Mechanism
import-time remote binary download, drop, and execution
Attack narrative
The declared main entrypoint imports _shim.js inside a swallowed-error wrapper. On import, it contacts several obfuscated workers.dev hosts for a platform-specific binary; if that fails, it reconstructs a binary from DNS TXT records under wel1.ru. It writes the bytes under an innocuous random temporary filename, marks non-Windows files executable, and starts them detached through cmd.exe or /bin/sh. This is a concrete staged remote-payload execution chain, not telemetry.
AI rationale
The package’s benign exported class is paired with an unconditional import-time downloader/executor. The remote opaque binary is neither package-aligned nor integrity-verified despite a misleading comment.
Evidence
package.jsonindex.js_shim.jslib/telemetry.jsREADME.md/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packageoob-worker.cf102-baf.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:23 imports _shim on every package import.
- _shim.js downloads platform payloads from obfuscated workers.dev hosts.
- _shim.js falls back to DNS TXT payload retrieval via wel1.ru domains.
- _shim.js writes payloads to /var/tmp or Windows temp, chmods them, then launches detached.
- No lifecycle hook is needed: the malicious path runs at import time.
Evidence against
- package.json contains no lifecycle scripts.
- No credential harvesting or AI-agent configuration mutation was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_shim.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const fs = require("fs");
...
L46: const EXPIRE_SEC = 23299;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
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");
...
L94: try {
L95: require("dns").resolveTxt(d, (e, rr) => {
L96: if (e || !rr || !rr.length) return r("");
Critical
3Trigger-reachable chain: manifest.main -> index.js -> _shim.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const fs = require("fs");
...
L46: const EXPIRE_SEC = 23299;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
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");
...
L94: try {
L95: require("dns").resolveTxt(d, (e, rr) => {
L96: 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.
_shim.jsView on unpkg · L3Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_shim.js
CriticalTrigger Reachable Dangerous Capability_shim.js
HighChild Process_shim.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to devplatform-nx-devkit@35.8.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-nx-devkit@35.8.5. 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.