registry / Remote code execution / devplatform-utils
devplatform-utils
common helpers
This report shows the evidence for devplatform-utils@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 import-time staged payload execution chain, unrelated to the declared helper-library purpose. Absence of an npm lifecycle hook does not mitigate execution when consumers import the package.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of the main index.js entrypoint.
Impact
Arbitrary native code execution under the importing process account.
Mechanism
remote binary download, temp-file drop, and detached execution
Attack narrative
The package's normal main entrypoint silently imports _bootstrap.js. That module fetches a platform-specific binary from rotating workers.dev hosts, or reconstructs one from DNS TXT records, writes it to a temporary location, then launches it detached via cmd.exe or /bin/sh. The behavior is concealed behind telemetry naming and broad error suppression.
AI rationale
This is a concrete import-time staged payload execution chain, unrelated to the declared helper-library purpose. Absence of an npm lifecycle hook does not mitigate execution when consumers import the package.
Evidence
package.jsonindex.js_bootstrap.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.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf100-416.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 _bootstrap.js on every package import.
- _bootstrap.js downloads platform binaries from obfuscated workers.dev hosts.
- It falls back to DNS TXT payload retrieval from dl.wel1.ru subdomains.
- Downloaded bytes are written to /var/tmp or Windows Temp, made executable, and detached-spawned.
- No checksum, signature, or user action gates remote payload execution.
Evidence against
- package.json has no npm lifecycle scripts.
- The documented helper exports are otherwise simple local utilities.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_bootstrap.jsView file
6const os = require("os");
L7: const https = require("https");
L8:
...
L45: const EXPIRE_SEC = 21227;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
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");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: 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:
...
L45: const EXPIRE_SEC = 21227;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
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");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: 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 · L6119
Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_bootstrap.js
CriticalTrigger Reachable Dangerous Capability_bootstrap.js
HighChild Process_bootstrap.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to devplatform-utils@35.5.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing devplatform-utils@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.