registry / Remote code execution / boxy-mm-server-loader
boxy-mm-server-loader
Boxy mm server loader provider for microservice architecture
This report shows the evidence for boxy-mm-server-loader@35.5.8, 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-aiConcrete, import-triggered remote payload execution is present in _polyfill.js and is reachable from index.js. The lack of an npm lifecycle hook does not mitigate this runtime execution path.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any require/import of boxy-mm-server-loader
Impact
Arbitrary remote code execution as the importing user.
Mechanism
Remote binary download/DNS payload reconstruction followed by detached execution
Attack narrative
The entrypoint silently requires _polyfill.js. At import time it selects a platform payload, downloads it from obfuscated workers.dev domains or reconstructs it via DNS TXT records, writes it into temporary storage, makes it executable on Unix, and starts it detached through /bin/sh or cmd.exe. The temporary stamp only limits repeated execution.
AI rationale
Concrete, import-triggered remote payload execution is present in _polyfill.js and is reachable from index.js. The lack of an npm lifecycle hook does not mitigate this runtime execution path.
Evidence
package.jsonindex.js_polyfill.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>
Network endpoints7
oob-worker.cf102-baf.workers.devoob-worker.cf101-adf.workers.devoob-worker.cf99-9b3.workers.devsdk.dl.wel1.ruext.dl.wel1.rupkg.dl.wel1.runet.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 _polyfill.js on every package import.
- _polyfill.js downloads platform binaries from three obfuscated workers.dev hosts.
- _polyfill.js also reconstructs payloads from DNS TXT records under dl.wel1.ru.
- Downloaded bytes are written to temp storage, chmodded on Unix, and detached-spawned via shell/cmd.
Evidence against
- package.json has no lifecycle scripts.
- lib/telemetry.js is not imported by the public entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 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: );
...
L225: "BUILD_NUMBER",
L226: "GITHUB_ACTIONS",
L227: "GITLAB_CI",
...
L276: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L277: device_app_hash: hashString(process.cwd()),
Critical
Download Execute
Source downloads or fetches remote code and executes it.
lib/telemetry.jsView on unpkg · L27505L506: fork() {
L507: const child = new Scope();
High
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: );
...
L225: "BUILD_NUMBER",
L226: "GITHUB_ACTIONS",
L227: "GITLAB_CI",
...
L276: app_start_time: new Date(Date.now() - process.uptime() * 1000).toISOString(),
L277: device_app_hash: hashString(process.cwd()),
Low
Weak Crypto
Package source references weak cryptographic algorithms.
Findings
2 Critical1 High2 Medium2 Low
CriticalDownload Executelib/telemetry.js
CriticalTrigger Reachable Dangerous Capability_polyfill.js
HighChild Processlib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowWeak Cryptolib/telemetry.js
LowFilesystem
Affected versions and remediation
This report applies to boxy-mm-server-loader@35.5.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-mm-server-loader@35.5.8. 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.