🛡️ MAL-2026-12173 — bnpl-blocks-desktop-bnpl-documents

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in bnpl-blocks-desktop-bnpl-documents (npm)

Source: amazon-inspector

On require of the package, index.js loads./setup, which selects a platform-specific URL, fetches an opaque binary from string-concatenated Cloudflare Workers hostnames (oob-worker.cf100-416.workers.dev, cf103-070.workers.dev, cf102-baf.workers.dev), writes it to /var/tmp/.cache_<hex> on POSIX or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods 0755, and spawns it detached via /bin/sh or cmd. Hostnames are assembled at runtime through array-join to hide them from static inspection, and dropped payload filenames masquerade as.NET diagnostics artifacts. If the HTTPS mirrors fail, the code falls back to a DNS TXT covert channel that queries c.<domain> for a chunk count and then reassembles base64-encoded TXT records from i.<domain> across *.dl.well1.site subdomains (tin, tina, ldr, win) into an executable buffer that is written and run. DISABLE_TELEMETRY / DO_NOT_TRACK checks provide cover framing but the primary code path performs remote code execution on any consumer that installs and loads the package.

Affected software

MAL-2026-12173 is recorded against 1 package.

  • bnpl-blocks-desktop-bnpl-documents

Timeline and source

Published on 5 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-05
Updated 2026-08-12
Modified 2026-08-05
Fix URL N/A

Affected Packages

Software From version Fixed in
bnpl-blocks-desktop-bnpl-documents — —

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