Malicious code in bigops-voximplant (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (e20e151930946a17e9bea02eb51c760264c27138792955452acc4231196ceaae) On require() of bigops-voximplant, index.js loads _ext.js which downloads an OS/arch-specific binary from Cloudflare Workers subdomains whose hostnames are reassembled at runtime from split string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev), with a DNS-over-TXT base64 chunked fallback resolving from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru to bypass HTTPS egress filtering. The fetched bytes are written to /tmp/.cache_<hex> on Unix (or %TEMP%\dotnet_diag_<hex>.exe on Windows), chmod'd 0755 via fs['chmod'+'Sync'], and detached-spawned via /bin/sh -c '<path> &' or cmd /c start /b, with no hash or signature verification and no source-of-truth publisher domain. A second, structurally identical dropper is bundled as lib/telemetry.js under an 'analytics SDK' cover story, using the same base64 chunk assembly, string-concatenated child_process require, and detached /bin/sh spawn. Hosts and dangerous APIs are constructed via runtime string joins ('child_'+'process', split-and-join hostname fragments) to defeat static inspection. The destinations are anonymous Cloudflare Workers and a.ru DNS-TXT channel unrelated to the package's stated Voximplant integration purpose. ## Source: ghsa-malware (883fad29cd53f12c99b7191ee77a0400cca0ee0911467b88f5d64f8b3402798a) 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 bigops-voximplant npm package (versions 20.8.5 and 35.4.8) includes malicious code that, upon require(), loads a script which downloads a binary payload from multiple anonymous Cloudflare Workers subdomains and DNS-over-TXT fallback domains. The payload is saved to temporary file locations on Unix or Windows systems, given executable permissions, and executed in a detached process without any hash or signature verification. A second similar dropper is embedded under an 'analytics SDK' cover, employing obfuscation techniques such as runtime string concatenation and split hostname fragments to evade static detection. The destinations for the payload are unrelated to the package's legitimate Voximplant functionality, indicating a supply chain compromise or malicious package insertion.
Potential Impact
This malicious behavior allows arbitrary code execution on the host system where the package is installed, potentially leading to full system compromise. The lack of verification on downloaded binaries and the use of obfuscation techniques increase the risk of undetected persistent malware installation. The execution of unknown binaries from anonymous sources bypasses typical network security controls, posing a significant threat to affected environments.
Mitigation Recommendations
No official patch or remediation is currently documented for this malicious package. Users should immediately remove the affected versions (=20.8.5 and =35.4.8) of bigops-voximplant from their environments. Avoid installing or using this package until a trusted, verified version is released. Employ supply chain security best practices such as verifying package integrity and source reputation before installation.
Malicious code in bigops-voximplant (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (e20e151930946a17e9bea02eb51c760264c27138792955452acc4231196ceaae) On require() of bigops-voximplant, index.js loads _ext.js which downloads an OS/arch-specific binary from Cloudflare Workers subdomains whose hostnames are reassembled at runtime from split string fragments (oob-worker.cf102-baf.workers.dev, oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev), with a DNS-over-TXT base64 chunked fallback resolving from sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru to bypass HTTPS egress filtering. The fetched bytes are written to /tmp/.cache_<hex> on Unix (or %TEMP%\dotnet_diag_<hex>.exe on Windows), chmod'd 0755 via fs['chmod'+'Sync'], and detached-spawned via /bin/sh -c '<path> &' or cmd /c start /b, with no hash or signature verification and no source-of-truth publisher domain. A second, structurally identical dropper is bundled as lib/telemetry.js under an 'analytics SDK' cover story, using the same base64 chunk assembly, string-concatenated child_process require, and detached /bin/sh spawn. Hosts and dangerous APIs are constructed via runtime string joins ('child_'+'process', split-and-join hostname fragments) to defeat static inspection. The destinations are anonymous Cloudflare Workers and a.ru DNS-TXT channel unrelated to the package's stated Voximplant integration purpose. ## Source: ghsa-malware (883fad29cd53f12c99b7191ee77a0400cca0ee0911467b88f5d64f8b3402798a) 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 bigops-voximplant npm package (versions 20.8.5 and 35.4.8) includes malicious code that, upon require(), loads a script which downloads a binary payload from multiple anonymous Cloudflare Workers subdomains and DNS-over-TXT fallback domains. The payload is saved to temporary file locations on Unix or Windows systems, given executable permissions, and executed in a detached process without any hash or signature verification. A second similar dropper is embedded under an 'analytics SDK' cover, employing obfuscation techniques such as runtime string concatenation and split hostname fragments to evade static detection. The destinations for the payload are unrelated to the package's legitimate Voximplant functionality, indicating a supply chain compromise or malicious package insertion.
Potential Impact
This malicious behavior allows arbitrary code execution on the host system where the package is installed, potentially leading to full system compromise. The lack of verification on downloaded binaries and the use of obfuscation techniques increase the risk of undetected persistent malware installation. The execution of unknown binaries from anonymous sources bypasses typical network security controls, posing a significant threat to affected environments.
Mitigation Recommendations
No official patch or remediation is currently documented for this malicious package. Users should immediately remove the affected versions (=20.8.5 and =35.4.8) of bigops-voximplant from their environments. Avoid installing or using this package until a trusted, verified version is released. Employ supply chain security best practices such as verifying package integrity and source reputation before installation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12172
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a738531bf8831d5394f072a
Added to database: 08/05/2026, 18:47:13 UTC
Last enriched: 08/05/2026, 21:16:34 UTC
Last updated: 09/07/2026, 21:54:35 UTC
Views: 20
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