Malicious code in devplatform-spa-plugin-error-boundary (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (282ec333b26c6283eb35916acab1db10c1362d296d0694b1548882c6e48c06be) The package's main index.js unconditionally requires./_ext, which runs at load time and fetches a per-platform binary over HTTPS from string-concatenation-obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev). If HTTPS fails, _ext.js falls back to a DNS TXT covert channel under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), querying c.<domain> for a chunk count then 0.<domain>, 1.<domain>,... and base64-decoding the concatenation into a binary. The fetched bytes are written to a randomly-named file in the temp directory (masquerading as.cache_<hex>, dotnet_diag_<hex>.exe, analytics_state), chmod'd 0755, and spawned detached via /bin/sh -c or cmd /c start /b. There is no version pinning, hash verification, or publisher-owned CDN, and the package's stated purpose (an SPA error-boundary component) has no legitimate reason to fetch and execute a native binary. Endpoint hostnames are assembled from split array literals at runtime to defeat static string scanning. Loading this package causes arbitrary attacker-controlled code to run on the installer's host. ## Source: ghsa-malware (52a6a2f9ca87decad3081725ea4293dce82d4c33a5afe1fdb9774776b95760be) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
AI Analysis
Technical Summary
The devplatform-spa-plugin-error-boundary npm package (version 35.4.6) includes a main index.js that unconditionally requires a module (_ext.js) which, at load time, fetches a platform-specific native binary from obfuscated Cloudflare Workers endpoints or a covert DNS TXT channel under *.dl.wel1.ru. The binary is base64-decoded, saved to a randomly named file in the temporary directory, given executable permissions, and executed detached from the main process. There is no version pinning or hash verification, and the package's legitimate functionality does not justify fetching or executing native code, indicating malicious intent and arbitrary code execution on the installer's host.
Potential Impact
Loading this package results in arbitrary code execution on the host system where it is installed, allowing an attacker to run any native binary of their choosing. This compromises the security and integrity of the affected system and can lead to full system compromise or further malicious activity.
Mitigation Recommendations
No official patch or remediation is currently available. Users should avoid installing or using devplatform-spa-plugin-error-boundary version 35.4.6. Remove the package from any environments where it is present. Monitor for updates from the package maintainer or npm security advisories for any future fixes or removals.
Malicious code in devplatform-spa-plugin-error-boundary (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (282ec333b26c6283eb35916acab1db10c1362d296d0694b1548882c6e48c06be) The package's main index.js unconditionally requires./_ext, which runs at load time and fetches a per-platform binary over HTTPS from string-concatenation-obfuscated Cloudflare Workers hosts (oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev). If HTTPS fails, _ext.js falls back to a DNS TXT covert channel under *.dl.wel1.ru (sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, net.dl.wel1.ru), querying c.<domain> for a chunk count then 0.<domain>, 1.<domain>,... and base64-decoding the concatenation into a binary. The fetched bytes are written to a randomly-named file in the temp directory (masquerading as.cache_<hex>, dotnet_diag_<hex>.exe, analytics_state), chmod'd 0755, and spawned detached via /bin/sh -c or cmd /c start /b. There is no version pinning, hash verification, or publisher-owned CDN, and the package's stated purpose (an SPA error-boundary component) has no legitimate reason to fetch and execute a native binary. Endpoint hostnames are assembled from split array literals at runtime to defeat static string scanning. Loading this package causes arbitrary attacker-controlled code to run on the installer's host. ## Source: ghsa-malware (52a6a2f9ca87decad3081725ea4293dce82d4c33a5afe1fdb9774776b95760be) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The devplatform-spa-plugin-error-boundary npm package (version 35.4.6) includes a main index.js that unconditionally requires a module (_ext.js) which, at load time, fetches a platform-specific native binary from obfuscated Cloudflare Workers endpoints or a covert DNS TXT channel under *.dl.wel1.ru. The binary is base64-decoded, saved to a randomly named file in the temporary directory, given executable permissions, and executed detached from the main process. There is no version pinning or hash verification, and the package's legitimate functionality does not justify fetching or executing native code, indicating malicious intent and arbitrary code execution on the installer's host.
Potential Impact
Loading this package results in arbitrary code execution on the host system where it is installed, allowing an attacker to run any native binary of their choosing. This compromises the security and integrity of the affected system and can lead to full system compromise or further malicious activity.
Mitigation Recommendations
No official patch or remediation is currently available. Users should avoid installing or using devplatform-spa-plugin-error-boundary version 35.4.6. Remove the package from any environments where it is present. Monitor for updates from the package maintainer or npm security advisories for any future fixes or removals.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12766
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a73573abf8831d539152754
Added to database: 08/05/2026, 15:31:06 UTC
Last enriched: 08/05/2026, 16:44:28 UTC
Last updated: 09/07/2026, 21:56:55 UTC
Views: 21
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