🛡️ MAL-2026-12634 — claims-payout-offer-domain

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

Description

Malicious code in claims-payout-offer-domain (npm)

Source: amazon-inspector

On require() of the package, index.js unconditionally loads _vendor.js, which selects an OS/arch-specific payload path and fetches an opaque binary over HTTPS from string-obfuscated Cloudflare Workers hosts (oob-worker.cf*-*.workers.dev, assembled at runtime via array-join to evade static analysis). A DNS-TXT covert-channel fallback reads a chunk count from c.dl.wel1.ru and reassembles base64-encoded bytes across numbered subdomains of dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under disguised names (e.g. dotnet_diag_*.exe,.cache_*), chmod 0755, and spawned detached via /bin/sh -c or cmd. No pinning, hash check, or signature verification is performed, and the destinations are not the publisher's infrastructure.

Affected software

MAL-2026-12634 is recorded against 1 package.

  • claims-payout-offer-domain

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
claims-payout-offer-domain — —

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