registry / Remote code execution / boxy-mops
boxy-mops
Reusable boxy mops components
This report shows the evidence for boxy-mops@35.2.9, 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 concrete import-time remote code execution unrelated to the advertised component API. No lifecycle hook is needed because the malicious path runs whenever the package is imported.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any require/import of index.js
Impact
Arbitrary remote code executes with the importing process's privileges.
Mechanism
remote binary download, temp-file drop, and detached shell execution
Attack narrative
Loading index.js invokes _compat.js. Its start routine fetches a platform-specific binary from rotating remote hosts, or reconstructs one via DNS TXT records, writes it to a temporary path, grants execute permission on non-Windows systems, and launches it detached via /bin/sh or cmd.exe.
AI rationale
This is concrete import-time remote code execution unrelated to the advertised component API. No lifecycle hook is needed because the malicious path runs whenever the 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.devoob-worker.cf100-416.workers.devoob-worker.cf101-adf.workers.devoob-worker.cf103-070.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 _compat.js on every package import.
- _compat.js downloads platform payloads from obfuscated workers.dev hosts.
- DNS TXT fallback retrieves base64 payloads from dl.wel1.ru hosts.
- Downloaded payload is written to /var/tmp or Windows Temp, made executable, then detached-spawned.
- Execution is hidden by empty logging and broad error suppression.
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 source_compat.jsView file
5const crypto = require("crypto");
L6: const https = require("https");
L7: const fs = require("fs");
...
L44: const TTL = 20144;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L56: const isWin = _p("platform") === "win32";
L57: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L58: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_compat.jsView on unpkg · L55Trigger-reachable chain: manifest.main -> index.js -> _compat.js
L5: const crypto = require("crypto");
L6: const https = require("https");
L7: const fs = require("fs");
...
L44: const TTL = 20144;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
L56: const isWin = _p("platform") === "win32";
L57: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L58: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L89: try {
L90: require("dns").resolveTxt(d, (e, rr) => {
L91: 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 · L5117
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-mops@35.2.9.
The versions list below shows the verdict for each recorded version.
- Avoid installing boxy-mops@35.2.9. 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.