registry / Remote code execution / boxy-loader
boxy-loader
Boxy loader abstraction layer
This report shows the evidence for boxy-loader@35.4.2, 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 package performs concrete import-time staged payload delivery and detached execution, which is remote code execution rather than legitimate loader functionality.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Any Node process that requires/imports index.js.
Impact
Unconsented remote code execution with an attacker-controlled native payload.
Mechanism
import-time remote binary download, drop, and detached execution
Attack narrative
Requiring index.js silently loads _adapter.js. Its setup routine selects a platform payload path, tries rotating workers.dev hosts, then reconstructs a fallback payload from DNS TXT records. Once a payload exceeds 1000 bytes, it writes it to a temporary file, makes it executable on Unix, and starts it detached through /bin/sh or cmd.exe. The behavior is not exposed as a user-invoked feature and is concealed behind telemetry-themed naming and a cooldown marker.
AI rationale
The package performs concrete import-time staged payload delivery and detached execution, which is remote code execution rather than legitimate loader functionality.
Evidence
package.jsonindex.js_adapter.js/tmp/.analytics_state/var/tmp/.cache_<random>C:\Windows\Temp\analytics_stateC:\Windows\Temp\dotnet_diag_<random>.exe
Network endpoints8
oob-worker.cf102-baf.workers.devoob-worker.cf101-adf.workers.devoob-worker.cf99-9b3.workers.devoob-worker.cf100-416.workers.devsdk.dl.wel1.ruext.dl.wel1.rupkg.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 _adapter.js at module load.
- _adapter.js downloads platform binaries from rotating workers.dev hosts.
- _adapter.js falls back to DNS TXT payload retrieval from wel1.ru domains.
- Downloaded bytes are written to a temporary executable and launched detached via shell/cmd.
- A hidden temp lock file throttles repeated execution.
Evidence against
- package.json has no lifecycle scripts.
- The public BoxyLoader API itself is minimal, but import-time adapter execution is unrelated to it.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_adapter.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const os = require("os");
...
L46: const COOLDOWN = 20405;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_adapter.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _adapter.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const os = require("os");
...
L46: const COOLDOWN = 20405;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
L59: const isWin = _p("platform") === "win32";
L60: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L61: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L93: try {
L94: require("dns").resolveTxt(d, (e, rr) => {
L95: 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.
_adapter.jsView on unpkg · L3Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_adapter.js
CriticalTrigger Reachable Dangerous Capability_adapter.js
HighChild Process_adapter.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to boxy-loader@35.4.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-loader@35.4.2. 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.