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Malicious code in claims-get-base-url (npm)

0
Unknown
Published: 08/05/2026 (08/05/2026, 14:05:09 UTC)
Source: GCVE Database
Product: claims-get-base-url

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7e7b7dbbb58284ead0ecb4d93490e9683b4f58b31955d817de52495fb7399106) index.js requires./setup on load, so any require() of this package triggers a dropper chain. setup.js selects a platform-specific payload path (linux/darwin/win32), downloads a binary over HTTPS from string-split-obfuscated hosts of the form oob-worker.cf10X-*.workers.dev with a DNS TXT-record fallback channel under sdk.dl.wel1.ru (hostnames are assembled at runtime via array joins such as ["oob-worker.cf102-baf.workers.de","v"].join("") to hide the.dev TLD from static scanners), writes it to a hidden path under /var/tmp or %TEMP% (.cache_<hex> / dotnet_diag_<hex>.exe), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe with stdio ignored and unref()'d. lib/telemetry.js contains a second, dormant copy of the same dropper shape (base64 chunk assembly, chmod 0755, detached /bin/sh spawn), referencing child_process as 'child_'+'process'. The package's advertised purpose ("claims get base url interface") has no legitimate need for cross-platform binary fetch-and-execute; the obfuscation, DNS fallback channel, and hidden dotfile staging are canonical import-time dropper tradecraft. Installing and loading this package runs attacker-controlled native code on the installer's machine.

Affected software

npmghsa
claims-get-base-url
Affected versions
=35.4.5

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-12619
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a735734bf8831d53913d19c

Added to database: 08/05/2026, 15:31:00 UTC

Last updated: 08/05/2026, 15:31:00 UTC

Views: 1

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