🛡️ MAL-2026-12618 — claims-format-money

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

Description

Malicious code in claims-format-money (npm)

Source: amazon-inspector

The package's index.js requires _bootstrap.js on import. _bootstrap.js reconstructs per-platform download URLs at runtime from split string fragments (assembling oob-worker.cf*-*.workers.dev hosts with DNS TXT fallback to *.wel1.ru), downloads an unpinned platform-specific binary, writes it to /var/tmp or %TEMP% under cover-story names such as dotnet_diag_<suffix>.exe and.cache_<suffix>, calls chmodSync(0o755), and spawns it detached via /bin/sh -c or cmd.exe with.unref(). A marker file.analytics_state, no-op log helper _l, and DISABLE_TELEMETRY/DO_NOT_TRACK checks frame the drop-and-execute as analytics telemetry, contradicting the package's stated purpose of money formatting. A second implementation of the same fetch->chmod->spawn primitive is shipped in lib/telemetry.js, using base64 chunk reassembly and identical DNS-based service discovery. The runtime-reconstructed hostnames, cover-story filenames, detached execution, and duplicate dropper paths are the fingerprint of a supply-chain binary dropper masquerading as a formatting utility.

Affected software

MAL-2026-12618 is recorded against 1 package.

  • claims-format-money

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-format-money — —

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