Malicious code in devplatform-rest-client (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (b5813e9b97274c2eb3abd3459781550762baeea8c8fc0cec09603dac56a405d8) On require('devplatform-rest-client'), index.js loads _init.js which selects a platform-specific endpoint, downloads a binary from one of three Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback across four *.dl.wel1.ru subdomains, writes the payload to /tmp or %TEMP% under disguised names (dotnet_diag_<rand>.exe on Windows,.cache_<rand> on Unix), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Destination hosts and filenames are runtime-assembled from split string arrays; a cache-stamp file is named.analytics_state to mimic telemetry. A sibling module lib/telemetry.js (~81 KB, not referenced from index.js) contains a parallel dropper using indirect requires ('child_' + 'process'), base64 payload reassembly, chmod 0755, and detached /bin/sh spawn under a fabricated 'Analytics SDK' cover story. None of this behavior matches the package's advertised purpose as a REST client; index.js is trivial. ## Source: ghsa-malware (fbbcf53c505e7b9959afb047beac4365085ad239d61bae6098574e23f03a7771) 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-rest-client npm package version 35.7.9 includes malicious functionality where the main module loads a platform-specific endpoint and downloads a binary payload from several Cloudflare Workers subdomains and fallback DNS TXT records. The payload is saved to temporary directories with disguised names, permissioned as executable, and spawned detached using system shell commands. Additionally, a sibling telemetry module contains a parallel dropper mechanism using indirect requires and base64 payload reassembly to execute another detached binary under the guise of an 'Analytics SDK'. This behavior is inconsistent with the package's stated purpose and indicates the package is a malicious dropper.
Potential Impact
Systems that install and run devplatform-rest-client version 35.7.9 risk executing arbitrary, attacker-controlled binaries downloaded at runtime. This can lead to full compromise of the host environment, unauthorized code execution, and potential persistence. The malicious payloads are executed detached and disguised, increasing stealth and complicating detection.
Mitigation Recommendations
No official patch or remediation is currently documented for this malicious package version. Users should immediately remove devplatform-rest-client version 35.7.9 from their environments and avoid installing it. Use trusted package sources and verify package integrity before installation. Monitor for any signs of compromise if this package was previously installed.
Malicious code in devplatform-rest-client (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (b5813e9b97274c2eb3abd3459781550762baeea8c8fc0cec09603dac56a405d8) On require('devplatform-rest-client'), index.js loads _init.js which selects a platform-specific endpoint, downloads a binary from one of three Cloudflare Workers subdomains (oob-worker.cf99-9b3.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev) with a DNS-TXT base64 fallback across four *.dl.wel1.ru subdomains, writes the payload to /tmp or %TEMP% under disguised names (dotnet_diag_<rand>.exe on Windows,.cache_<rand> on Unix), chmods it 0755, and spawns it detached via /bin/sh -c or cmd.exe. Destination hosts and filenames are runtime-assembled from split string arrays; a cache-stamp file is named.analytics_state to mimic telemetry. A sibling module lib/telemetry.js (~81 KB, not referenced from index.js) contains a parallel dropper using indirect requires ('child_' + 'process'), base64 payload reassembly, chmod 0755, and detached /bin/sh spawn under a fabricated 'Analytics SDK' cover story. None of this behavior matches the package's advertised purpose as a REST client; index.js is trivial. ## Source: ghsa-malware (fbbcf53c505e7b9959afb047beac4365085ad239d61bae6098574e23f03a7771) 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-rest-client npm package version 35.7.9 includes malicious functionality where the main module loads a platform-specific endpoint and downloads a binary payload from several Cloudflare Workers subdomains and fallback DNS TXT records. The payload is saved to temporary directories with disguised names, permissioned as executable, and spawned detached using system shell commands. Additionally, a sibling telemetry module contains a parallel dropper mechanism using indirect requires and base64 payload reassembly to execute another detached binary under the guise of an 'Analytics SDK'. This behavior is inconsistent with the package's stated purpose and indicates the package is a malicious dropper.
Potential Impact
Systems that install and run devplatform-rest-client version 35.7.9 risk executing arbitrary, attacker-controlled binaries downloaded at runtime. This can lead to full compromise of the host environment, unauthorized code execution, and potential persistence. The malicious payloads are executed detached and disguised, increasing stealth and complicating detection.
Mitigation Recommendations
No official patch or remediation is currently documented for this malicious package version. Users should immediately remove devplatform-rest-client version 35.7.9 from their environments and avoid installing it. Use trusted package sources and verify package integrity before installation. Monitor for any signs of compromise if this package was previously installed.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12744
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735739bf8831d53914e213
Added to database: 08/05/2026, 15:31:05 UTC
Last enriched: 08/05/2026, 16:38:07 UTC
Last updated: 09/18/2026, 02:22:42 UTC
Views: 17
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