registry / Remote code execution / bnpl-blocks-utils
bnpl-blocks-utils
utility functions
This report shows the evidence for bnpl-blocks-utils@35.7.1, 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 package claims only helper methods, yet its import path implements a concealed remote binary loader and executor. The behavior creates a direct arbitrary-code-execution chain without user consent.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any runtime require/import of index.js.
Impact
Unconsented arbitrary native code execution as the importing process user.
Mechanism
Remote payload download, drop, and detached execution.
Attack narrative
The public entrypoint suppresses errors while loading _loader.js. On import, it rate-limits via a temporary stamp, retrieves a platform-specific binary from disguised CDN hosts or DNS TXT chunks, writes it into a temporary directory, makes it executable on Unix, and launches it detached through a shell or cmd.exe. The telemetry file contains matching payload-loader functionality, reinforcing that this is deliberate rather than a utility feature.
AI rationale
This package claims only helper methods, yet its import path implements a concealed remote binary loader and executor. The behavior creates a direct arbitrary-code-execution chain without user consent.
Evidence
package.jsonindex.js_loader.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.cf100-416.workers.dev/pkg/packageoob-worker.cf101-adf.workers.dev/pkg/packageoob-worker.cf99-9b3.workers.dev/pkg/packagesdk.dl.wel1.ruext.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 _loader.js on every package import.
- _loader.js downloads platform-specific payloads from Workers hosts or DNS TXT records.
- _loader.js writes payloads to temporary storage, chmods them, then detached-spawns them.
- Network destinations and downloaded binaries are unrelated to the documented utility API.
Evidence against
- package.json has no lifecycle scripts.
- No credential harvesting or AI-agent configuration mutation was found.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading source_loader.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const path = require("path");
...
L44: const MAX_AGE = 22512;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
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");
...
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.
_loader.jsView on unpkg · L33Trigger-reachable chain: manifest.main -> index.js -> _loader.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const path = require("path");
...
L44: const MAX_AGE = 22512;
L45: const _l = (...a) => process.stderr.write("");
L46:
...
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");
...
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.
_loader.jsView on unpkg · L3Findings
2 Critical2 High3 Medium2 Low
CriticalDownload Execute_loader.js
CriticalTrigger Reachable Dangerous Capability_loader.js
HighChild Process_loader.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 bnpl-blocks-utils@35.7.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing bnpl-blocks-utils@35.7.1. 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.