registry / Remote code execution / boxy-maker-skeleton
boxy-maker-skeleton
Internal boxy maker skeleton module for platform services
This report shows the evidence for boxy-maker-skeleton@35.8.9, 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-aiThis is a concrete import-time staged payload execution chain, not package-aligned telemetry. The unused-looking telemetry module contains a parallel configurable downloader/launcher design, reinforcing intent.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of the main entrypoint.
Impact
Arbitrary remote code executes as the importing process user.
Mechanism
remote binary download, drop, chmod, and detached execution
Attack narrative
The main entrypoint silently requires _compat.js, which runs immediately. It downloads a platform-specific payload from rotating worker hosts or reconstructs one from DNS TXT records, saves it under a disguised temporary filename, marks it executable on Unix, and starts it detached through a shell or cmd.exe.
AI rationale
This is a concrete import-time staged payload execution chain, not package-aligned telemetry. The unused-looking telemetry module contains a parallel configurable downloader/launcher design, reinforcing intent.
Evidence
package.jsonindex.js_compat.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.cf101-adf.workers.dev/pkg/packageoob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packagesdk.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 _compat at module load.
- _compat.js downloads platform binaries over HTTPS.
- _compat.js falls back to DNS TXT payload retrieval.
- Downloaded bytes are written to temp and executed detached.
- Remote hosts are obfuscated and unrelated to package purpose.
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or AI-agent config writes found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
4 flagged · loading source_compat.jsView file
6const path = require("path");
L7: const https = require("https");
L8:
...
L42: const EXPIRE_SEC = 22292;
L43: const _l = (...a) => process.stderr.write("");
L44:
...
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");
...
L87: try {
L88: require("dns").resolveTxt(d, (e, rr) => {
L89: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_compat.jsView on unpkg · L66Trigger-reachable chain: manifest.main -> index.js -> _compat.js
L6: const path = require("path");
L7: const https = require("https");
L8:
...
L42: const EXPIRE_SEC = 22292;
L43: const _l = (...a) => process.stderr.write("");
L44:
...
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");
...
L87: try {
L88: require("dns").resolveTxt(d, (e, rr) => {
L89: 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.
_compat.jsView on unpkg · L6116try {
L117: const cp = require("child_process");
L118: if (isWin) {
Findings
2 Critical2 High2 Medium1 Low
CriticalDownload Execute_compat.js
CriticalTrigger Reachable Dangerous Capability_compat.js
HighChild Process_compat.js
HighKnown Malware Source Similaritylib/telemetry.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to boxy-maker-skeleton@35.8.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-maker-skeleton@35.8.9. 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.