registry / Remote code execution / bnpl-blocks-fonts
bnpl-blocks-fonts
Bnpl blocks fonts abstraction layer
This report shows the evidence for bnpl-blocks-fonts@35.2.2, 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 contains concrete, import-time remote binary execution concealed behind an unrelated fonts API. This is a direct malware execution chain, not normal telemetry.
Static reason
High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review
Trigger
Any Node.js require/import resolving index.js.
Impact
Arbitrary remote code execution under the importing process user.
Mechanism
Remote payload download, disk drop, and detached shell execution.
Attack narrative
Requiring the documented package entry point loads _ext.js. It fingerprints the platform, retrieves a binary from rotating Workers hosts or DNS TXT records, writes it to a temporary directory, marks it executable on Unix, and launches it detached through a shell or cmd.exe. The payload source is remote and can change independently of the published package.
AI rationale
The package contains concrete, import-time remote binary execution concealed behind an unrelated fonts API. This is a direct malware execution chain, not normal telemetry.
Evidence
package.jsonindex.js_ext.jslib/telemetry.js/tmp/.analytics_state/var/tmp/.cache_<random>Windows Temp/analytics_stateWindows Temp/dotnet_diag_<random>.exe
Network endpoints7
oob-worker.cf101-adf.workers.devoob-worker.cf99-9b3.workers.devoob-worker.cf100-416.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 _ext.js on every package import.
- _ext.js downloads platform-specific binary payloads over HTTPS or DNS TXT.
- _ext.js writes payloads to /var/tmp or Windows Temp, chmods Unix files, then detaches execution.
- Remote hosts and DNS payload fallback are obfuscated by string concatenation.
- _ext.js suppresses errors and uses a temporary timestamp to throttle repeat execution.
Evidence against
- package.json has no lifecycle hooks.
- The advertised index API is a minimal fonts wrapper, but it silently loads the unrelated extension.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStrings
Source & flagged code
4 flagged · loading source_ext.jsView file
3const crypto = require("crypto");
L4: const https = require("https");
L5: const path = require("path");
...
L46: const EXPIRE_SEC = 20991;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L95: try {
L96: require("dns").resolveTxt(d, (e, rr) => {
L97: if (e || !rr || !rr.length) return r("");
Critical
3Trigger-reachable chain: manifest.main -> index.js -> _ext.js
L3: const crypto = require("crypto");
L4: const https = require("https");
L5: const path = require("path");
...
L46: const EXPIRE_SEC = 20991;
L47: const _l = (...a) => process.stderr.write("");
L48:
...
L58: const isWin = _p("platform") === "win32";
L59: const dir = isWin ? (process.env.TEMP || process.env.TMP || "C:\\Windows\\Temp") : "/tmp";
L60: return path.join(dir, isWin ? "analytics_state" : ".analytics_state");
...
L95: try {
L96: require("dns").resolveTxt(d, (e, rr) => {
L97: 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.
_ext.jsView on unpkg · L3123
Findings
2 Critical2 High3 Medium2 Low
CriticalDownload Execute_ext.js
CriticalTrigger Reachable Dangerous Capability_ext.js
HighChild Process_ext.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-fonts@35.2.2.
The versions list below shows the verdict for each recorded version.
- Avoid installing bnpl-blocks-fonts@35.2.2. 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.