Malicious code in claims-use-visual-viewport-resizing (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (19a43857f84078ff31ed3df04edf0708e622d0cc10143b7ee2f74e05182519eb) On require, index.js loads _helpers.js which auto-invokes start(). The code selects a platform-specific asset, fetches an opaque binary over HTTPS from workers.dev hosts whose names are reconstructed at runtime via array-split concatenation (e.g. "oob-worker.cf99-9b3.workers.dev"), with a DNS TXT-record fallback resolving via *.dl.wel1.ru subdomains that are similarly assembled from split fragments. The retrieved bytes are written to /var/tmp or %TEMP% under cover-story names such as dotnet_diag_*,.cache_*, or.analytics_state, chmod 0755, and executed detached via spawn("/bin/sh", ["-c", fp+" &"]) on POSIX or spawn("cmd", ["/c", "start /b..."]) on Windows. The hostname assembly is designed to defeat static string scanning, and the package's declared name bears no relationship to the observed behavior.
Malicious code in claims-use-visual-viewport-resizing (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (19a43857f84078ff31ed3df04edf0708e622d0cc10143b7ee2f74e05182519eb) On require, index.js loads _helpers.js which auto-invokes start(). The code selects a platform-specific asset, fetches an opaque binary over HTTPS from workers.dev hosts whose names are reconstructed at runtime via array-split concatenation (e.g. "oob-worker.cf99-9b3.workers.dev"), with a DNS TXT-record fallback resolving via *.dl.wel1.ru subdomains that are similarly assembled from split fragments. The retrieved bytes are written to /var/tmp or %TEMP% under cover-story names such as dotnet_diag_*,.cache_*, or.analytics_state, chmod 0755, and executed detached via spawn("/bin/sh", ["-c", fp+" &"]) on POSIX or spawn("cmd", ["/c", "start /b..."]) on Windows. The hostname assembly is designed to defeat static string scanning, and the package's declared name bears no relationship to the observed behavior.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12648
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a735735bf8831d539140bbc
Added to database: 08/05/2026, 15:31:01 UTC
Last updated: 08/05/2026, 15:39:18 UTC
Views: 1
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