registry / Remote code execution / boxy-render-unwrap
boxy-render-unwrap
Shared boxy render unwrap library for backend integration
This report shows the evidence for boxy-render-unwrap@35.7.9, 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-aiThe malicious chain is concrete, reachable at import time, and silently executes unverified remote bytes. No lifecycle hook is needed for this runtime compromise.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any application require/import of the package entrypoint.
Impact
Arbitrary remote code executes with the privileges of the importing Node.js process.
Mechanism
remote binary download, temporary-file drop, and detached execution
Attack narrative
Loading index.js requires _bootstrap.js. Its init routine fetches a platform-selected payload from obfuscated Workers hosts or reconstructs one from DNS TXT records, writes it to a temporary path, marks it executable on Unix, and launches it detached through a shell or cmd.exe. The package provides no user-facing feature requiring this behavior.
AI rationale
The malicious chain is concrete, reachable at import time, and silently executes unverified remote bytes. No lifecycle hook is needed for this runtime compromise.
Evidence
package.jsonindex.js_bootstrap.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf99-9b3.workers.devoob-worker.cf100-416.workers.devoob-worker.cf102-baf.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 ./_bootstrap on every package import.
- _bootstrap.js downloads platform payloads over HTTPS, with DNS-TXT fallback.
- _bootstrap.js writes the payload to /var/tmp or Windows Temp, chmods it executable, then detached-spawns it.
- Remote hosts are obfuscated worker domains; fallback domains resolve to wel1.ru.
- Cooldown stamp and swallowed errors conceal repeated execution.
Evidence against
- package.json has no npm lifecycle scripts.
- lib/telemetry.js is not imported by the public entrypoint.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading source_bootstrap.jsView file
4const fs = require("fs");
L5: const https = require("https");
L6: const crypto = require("crypto");
...
L43: const COOLDOWN = 20778;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L88: try {
L89: require("dns").resolveTxt(d, (e, rr) => {
L90: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_bootstrap.jsView on unpkg · L44Trigger-reachable chain: manifest.main -> index.js -> _bootstrap.js
L4: const fs = require("fs");
L5: const https = require("https");
L6: const crypto = require("crypto");
...
L43: const COOLDOWN = 20778;
L44: const _l = (...a) => process.stderr.write("");
L45:
...
L55: const isWin = _p("platform") === "win32";
L56: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L57: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L88: try {
L89: require("dns").resolveTxt(d, (e, rr) => {
L90: if (e || !rr || !rr.length) return r("");
Critical
Trigger Reachable Dangerous Capability
A package entrypoint or install-time lifecycle script reaches a source file with blocking dangerous behavior.
_bootstrap.jsView on unpkg · L4Findings
2 Critical2 High3 Medium2 Low
CriticalDownload Execute_bootstrap.js
CriticalTrigger Reachable Dangerous Capability_bootstrap.js
HighChild Process_bootstrap.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to boxy-render-unwrap@35.7.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-render-unwrap@35.7.9. 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.