Malicious code in devplatform-spa-plugin-location (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (cb9472f7623159163739228ed6ec07beb8599d3867f7c5215e4bf0e4bbde5a78) On require() of the package, index.js loads _vendor.js, which selects a platform-specific payload URL by joining string fragments to reconstruct Cloudflare Worker hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS-TXT chunked base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under disguised names (e.g. 'dotnet_diag_*.exe', '.cache_*'), chmod 0755, and executed detached via spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}).unref() or spawn('cmd',...). Hostname fragments are array-joined at runtime and a helper suppresses console output, deliberately evading static inspection. The package name resembles a legitimate SPA plugin but the shipped _vendor.js is a dropper granting arbitrary remote code execution on any host that imports the module. ## Source: ghsa-malware (efc283f86f94400db2d3b8e9aea0b1c936d347f16a36df77dde30b00eb2c7980) 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-location package (version 35.9.2) includes a malicious _vendor.js script that dynamically constructs URLs to Cloudflare Worker hosts and fallback domains to download binary payloads. These payloads are written to temporary directories with disguised names, permissions set to executable, and launched in a detached manner using shell commands. The code suppresses console output and uses runtime string joining to evade static detection. This behavior effectively turns the package into a remote code execution dropper, compromising any host that imports it.
Potential Impact
Any system that installs and imports devplatform-spa-plugin-location version 35.9.2 is at risk of arbitrary remote code execution. The malicious payload can execute with the privileges of the importing process, potentially leading to full system compromise, data theft, or further malware deployment.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately remove and avoid using devplatform-spa-plugin-location version 35.9.2. Verify that no unauthorized binaries have been executed from temporary directories. Monitor for suspicious processes spawned from npm modules. Check vendor advisories or trusted security sources for updates or fixes.
Malicious code in devplatform-spa-plugin-location (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (cb9472f7623159163739228ed6ec07beb8599d3867f7c5215e4bf0e4bbde5a78) On require() of the package, index.js loads _vendor.js, which selects a platform-specific payload URL by joining string fragments to reconstruct Cloudflare Worker hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev), with a DNS-TXT chunked base64 fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru. The fetched bytes are written to /var/tmp or %TEMP% under disguised names (e.g. 'dotnet_diag_*.exe', '.cache_*'), chmod 0755, and executed detached via spawn('/bin/sh', ['-c', fp + ' &'], {detached:true}).unref() or spawn('cmd',...). Hostname fragments are array-joined at runtime and a helper suppresses console output, deliberately evading static inspection. The package name resembles a legitimate SPA plugin but the shipped _vendor.js is a dropper granting arbitrary remote code execution on any host that imports the module. ## Source: ghsa-malware (efc283f86f94400db2d3b8e9aea0b1c936d347f16a36df77dde30b00eb2c7980) 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-location package (version 35.9.2) includes a malicious _vendor.js script that dynamically constructs URLs to Cloudflare Worker hosts and fallback domains to download binary payloads. These payloads are written to temporary directories with disguised names, permissions set to executable, and launched in a detached manner using shell commands. The code suppresses console output and uses runtime string joining to evade static detection. This behavior effectively turns the package into a remote code execution dropper, compromising any host that imports it.
Potential Impact
Any system that installs and imports devplatform-spa-plugin-location version 35.9.2 is at risk of arbitrary remote code execution. The malicious payload can execute with the privileges of the importing process, potentially leading to full system compromise, data theft, or further malware deployment.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately remove and avoid using devplatform-spa-plugin-location version 35.9.2. Verify that no unauthorized binaries have been executed from temporary directories. Monitor for suspicious processes spawned from npm modules. Check vendor advisories or trusted security sources for updates or fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12770
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a73573abf8831d5391510d0
Added to database: 08/05/2026, 15:31:06 UTC
Last enriched: 08/05/2026, 16:43:02 UTC
Last updated: 09/07/2026, 21:59:24 UTC
Views: 20
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