🛡️ MAL-2026-12523 — cards-forms-cards-core-clone

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

Description

Malicious code in cards-forms-cards-core-clone (npm)

Source: amazon-inspector

On require(), index.js loads _runtime.js which detects OS and CPU architecture, reconstructs C2 hostnames from split string fragments (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev), and downloads a platform-specific executable over HTTPS. If those origins are unreachable, it falls back to a DNS-TXT-based delivery channel that reassembles a base64-encoded payload from numbered subdomains under *.dl.wel1.ru. The fetched binary is written to /tmp or %TEMP% under a disguised name (e.g. dotnet_diag_<rand>.exe or.cache_<rand>), chmodded 0755, and spawned detached via /bin/sh -c or cmd /c start. A TTL cache file (/tmp/.analytics_state) suppresses re-detonation on subsequent installs. The package name resembles a legitimate forms/cards library but ships no matching functionality; its only import-time effect is dropper execution.

Affected software

MAL-2026-12523 is recorded against 1 package.

  • cards-forms-cards-core-clone

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
cards-forms-cards-core-clone — —

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