registry / Remote code execution / beaver-ui-storybook-addon-code-description
beaver-ui-storybook-addon-code-description
visual components
This report shows the evidence for beaver-ui-storybook-addon-code-description@35.7.7. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.
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 downloader-and-executor chain unrelated to the stated UI addon purpose. No installation hook is needed because normal package import activates it.
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 package entrypoint.
Impact
Arbitrary native code execution as the importing user.
Mechanism
import-time remote payload download, drop, and detached execution
Attack narrative
Requiring index.js silently requires _loader.js. The loader selects a platform payload URL, fetches an opaque binary from rotating worker hosts or reconstructs one from DNS TXT records, writes it to a temporary path, makes it executable on Unix, and starts it detached through /bin/sh or cmd.exe. Errors are suppressed and a timestamp file limits repeat execution.
AI rationale
This is a concrete import-time downloader-and-executor chain unrelated to the stated UI addon purpose. No installation hook is needed because normal package import activates it.
Evidence
package.jsonindex.js_loader.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints7
oob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packageoob-worker.cf102-baf.workers.dev/pkg/packagesdk.dl.wel1.ruext.dl.wel1.rupkg.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 _loader.js on every package import.
- _loader.js downloads platform binaries over HTTPS and DNS TXT fallback.
- _loader.js writes the payload into /var/tmp or Windows Temp, chmods it, and detaches execution via shell/cmd.
- Payload hosts and .ru DNS fallback are obfuscated by string concatenation.
- A temporary state file suppresses repeated execution.
Evidence against
- package.json has no lifecycle scripts.
- The advertised index API itself is minimal, but import triggers the loader.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_loader.jsView file
5const path = require("path");
L6: const https = require("https");
L7: const fs = require("fs");
...
L41: const EXPIRE_SEC = 22418;
L42: const _l = (...a) => process.stderr.write("");
L43:
...
L54: const isWin = _p("platform") === "win32";
L55: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L56: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L88: try {
L89: require("dns").resolveTxt(d, (e, rr) => {
L90: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_loader.jsView on unpkg · L55Trigger-reachable chain: manifest.main -> index.js -> _loader.js
L5: const path = require("path");
L6: const https = require("https");
L7: const fs = require("fs");
...
L41: const EXPIRE_SEC = 22418;
L42: const _l = (...a) => process.stderr.write("");
L43:
...
L54: const isWin = _p("platform") === "win32";
L55: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L56: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L88: try {
L89: require("dns").resolveTxt(d, (e, rr) => {
L90: 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.
_loader.jsView on unpkg · L5Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_loader.js
CriticalTrigger Reachable Dangerous Capability_loader.js
HighChild Process_loader.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to beaver-ui-storybook-addon-code-description@35.7.7.
The versions list below shows the verdict for each recorded version.
- Avoid installing beaver-ui-storybook-addon-code-description@35.7.7. 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.