registry / Remote code execution / boxy-maker-extendable-minihost
boxy-maker-extendable-minihost
Boxy maker extendable minihost runtime support module
This report shows the evidence for boxy-maker-extendable-minihost@35.7.5, 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 remote payload execution chain, not ordinary telemetry. The hidden loader and DNS fallback make the downloaded executable attacker-controlled and unauditable at review time.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Runtime import/require of the package main entrypoint.
Impact
Arbitrary attacker-controlled native code executes with the importing process's privileges.
Mechanism
import-time remote binary download, drop, chmod, and detached execution
Attack narrative
The declared entrypoint suppresses errors while importing _bridge.js. That module runs immediately, fetches a platform-specific opaque payload from hard-coded remote hosts or DNS TXT records, stores it under a hidden/random temporary filename, makes it executable on Unix, and launches it through a detached shell or cmd.exe process.
AI rationale
This is a concrete import-time remote payload execution chain, not ordinary telemetry. The hidden loader and DNS fallback make the downloaded executable attacker-controlled and unauditable at review time.
Evidence
package.jsonindex.js_bridge.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints8
oob-worker.cf101-adf.workers.devoob-worker.cf100-416.workers.devoob-worker.cf103-070.workers.devoob-worker.cf102-baf.workers.devsdk.dl.wel1.ruext.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 _bridge.js on every package import.
- _bridge.js downloads platform binaries from four workers.dev hosts.
- _bridge.js falls back to DNS TXT payloads from wel1.ru hosts.
- _bridge.js writes the payload to a temp file, chmods it, and starts it detached.
- No lifecycle hook is needed; importing the declared main triggers it.
Evidence against
- package.json declares no install lifecycle scripts.
- No credential or environment-value exfiltration was found in the entrypoint loader.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
5 flagged · loading sourcelib/telemetry.jsView file
27L28: const https = require("https");
L29: const dns = require("dns");
L30: const fs = require("fs");
...
L116: const _logger = new Logger(
L117: process.env.ANALYTICS_DEBUG ? LogLevel.DEBUG : LogLevel.NONE
L118: );
...
L224: "BUILD_NUMBER",
L225: "GITHUB_ACTIONS",
L226: "GITLAB_CI",
...
L275: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L276: device_app_hash: hashString(process.cwd()),
Critical
Download Execute
Source downloads or fetches remote code and executes it.
lib/telemetry.jsView on unpkg · L27490L491: fork() {
L492: const child = new Scope();
High
•matchType = normalized_sha256
matchedPackage = boxy-add-script@35.2.2
matchedPath = lib/telemetry.js
matchedIdentity = npm:Ym94eS1hZGQtc2NyaXB0:35.2.2
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.
lib/telemetry.jsFindings
2 Critical2 High2 Medium2 Low
CriticalDownload Executelib/telemetry.js
CriticalTrigger Reachable Dangerous Capability_bridge.js
HighChild Processlib/telemetry.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowWeak Cryptolib/telemetry.js
LowFilesystem
Affected versions and remediation
This report applies to boxy-maker-extendable-minihost@35.7.5.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-maker-extendable-minihost@35.7.5. 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.