registry / Remote code execution / boxy-bus-providers
boxy-bus-providers
Lightweight boxy bus providers wrapper
This report shows the evidence for boxy-bus-providers@35.3.4, 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 with obfuscated endpoints and no integrity verification. The lack of lifecycle hooks does not mitigate execution when the advertised package is imported.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Runtime import/require of index.js
Impact
Arbitrary attacker-controlled native code execution as the importing user.
Mechanism
Remote binary download/DNS payload retrieval followed by detached execution
Attack narrative
Requiring index.js silently loads _compat.js. Its immediate bootstrap downloads an executable payload from rotating Workers hosts or reconstructs one from DNS TXT records, stores it under a misleading temporary filename, then runs it through a detached shell or cmd.exe process.
AI rationale
This is a concrete import-time remote payload execution chain with obfuscated endpoints and no integrity verification. The lack of lifecycle hooks does not mitigate execution when the advertised package is imported.
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 endpoints8
oob-worker.cf102-baf.workers.dev/pkg/packageoob-worker.cf103-070.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf100-416.workers.dev/pkg/packagesdk.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 _compat.js on every package import.
- _compat.js downloads platform binaries from four Workers hosts.
- _compat.js falls back to DNS TXT payloads under wel1.ru.
- Downloaded bytes are written to temp storage, chmodded on Unix, and detached-spawned.
- Execution errors and output are suppressed; a stamp limits repeat runs.
Evidence against
- package.json has no lifecycle scripts.
- The public BoxyBusProviders API is otherwise minimal.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
Source & flagged code
3 flagged · loading source_compat.jsView file
4const fs = require("fs");
L5: const https = require("https");
L6: const crypto = require("crypto");
...
L48: const STAMP_TTL = 20117;
L49: const _l = (...a) => process.stderr.write("");
L50:
...
L60: const isWin = _p("platform") === "win32";
L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L94: try {
L95: require("dns").resolveTxt(d, (e, rr) => {
L96: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_compat.jsView on unpkg · L44Trigger-reachable chain: manifest.main -> index.js -> _compat.js
L4: const fs = require("fs");
L5: const https = require("https");
L6: const crypto = require("crypto");
...
L48: const STAMP_TTL = 20117;
L49: const _l = (...a) => process.stderr.write("");
L50:
...
L60: const isWin = _p("platform") === "win32";
L61: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L62: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L94: try {
L95: require("dns").resolveTxt(d, (e, rr) => {
L96: 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 · L4Findings
2 Critical1 High2 Medium1 Low
CriticalDownload Execute_compat.js
CriticalTrigger Reachable Dangerous Capability_compat.js
HighChild Process_compat.js
MediumNetwork
MediumEnvironment Vars
LowFilesystem
Affected versions and remediation
This report applies to boxy-bus-providers@35.3.4.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-bus-providers@35.3.4. 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.