registry / Remote code execution / checkout-desktop-legal
checkout-desktop-legal
Checkout desktop legal abstraction layer
This report shows the evidence for checkout-desktop-legal@35.2.8, 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 import-time remote payload download and detached execution are direct malicious behavior, not package-aligned telemetry. The package has no legitimate implementation that requires this capability.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any Node.js require/import of the package main entrypoint.
Impact
Unconsented arbitrary native code execution under the importing user's privileges.
Mechanism
remote binary download/DNS staging followed by detached execution
Attack narrative
Requiring index.js loads _compat.js, which marks a temp state file, fetches an opaque payload from obfuscated Workers hosts or DNS TXT records, saves it under /var/tmp or the Windows temp directory, makes it executable on Unix, and launches it through a detached shell/cmd process. This is a concrete staged payload execution chain without user invocation.
AI rationale
The import-time remote payload download and detached execution are direct malicious behavior, not package-aligned telemetry. The package has no legitimate implementation that requires this capability.
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.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 unconditionally requires ./_compat on import.
- _compat.js downloads platform binaries from worker hosts.
- _compat.js falls back to DNS TXT payload retrieval.
- _compat.js writes payloads to temp storage, chmods, and detached-spawns them.
- _compat.js obscures hosts with split strings and suppresses errors/output.
- lib/telemetry.js contains the same download-to-temp-and-execute mechanism.
Evidence against
- package.json has no lifecycle scripts.
- The public legal API itself is minimal and does not use telemetry.js.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading source_compat.jsView file
3const path = require("path");
L4: const https = require("https");
L5: const fs = require("fs");
...
L45: const TTL = 21496;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
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");
...
L92: try {
L93: require("dns").resolveTxt(d, (e, rr) => {
L94: if (e || !rr || !rr.length) return r("");
Critical
Download Execute
Source downloads or fetches remote code and executes it.
_compat.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _compat.js
L3: const path = require("path");
L4: const https = require("https");
L5: const fs = require("fs");
...
L45: const TTL = 21496;
L46: const _l = (...a) => process.stderr.write("");
L47:
...
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");
...
L92: try {
L93: require("dns").resolveTxt(d, (e, rr) => {
L94: 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 · L3Findings
2 Critical2 High3 Medium2 Low
CriticalDownload Execute_compat.js
CriticalTrigger Reachable Dangerous Capability_compat.js
HighChild Process_compat.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 checkout-desktop-legal@35.2.8.
The versions list below shows the verdict for each recorded version.
- Avoid installing checkout-desktop-legal@35.2.8. 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.