Malicious code in devplatform-react-rest-client (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (755ebe99a58cc94ddd8953897d01f30fcbacd145f6acf635761cf08b33d4868c) On require of this package, index.js loads _ext.js, which fetches a platform-specific binary from a rotating list of Cloudflare workers.dev hosts assembled at runtime via array.join to defeat static string scanning (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked fallback channel via *.dl.wel1.ru (sdk, ext, pkg, net). The fetched binary is written to /tmp or %TEMP% under a cover-story name impersonating.NET diagnostics tooling (dotnet_diag_<hex>.exe on Windows,.cache_<hex> on POSIX), chmod 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe. Any consumer that requires the package on install/import receives arbitrary attacker-controlled code execution on the host. ## Source: ghsa-malware (26008a5d95840ff404c5a75362ed3d81eedbd8989fcd37a6c40441421a96dc29) 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-react-rest-client package version 35.4.8 includes malicious functionality where its index.js loads an auxiliary script (_ext.js) that fetches a platform-specific binary from a set of dynamically assembled Cloudflare workers.dev URLs to evade static detection. If the fetch fails, a DNS-TXT chunked fallback mechanism from *.dl.wel1.ru is used. The binary is stored in temporary directories under names impersonating legitimate .NET diagnostic executables and executed detached via shell commands. This results in arbitrary code execution on any system that installs or imports this package version.
Potential Impact
Any user or system that installs or imports devplatform-react-rest-client version 35.4.8 is at risk of arbitrary code execution by an attacker. This can lead to full compromise of the host environment, including unauthorized access, data theft, or further malware deployment.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately avoid installing or importing devplatform-react-rest-client version 35.4.8. Remove this package from any environments where it is present. Monitor for suspicious activity related to this package. Check vendor or repository advisories for updates or official fixes. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Malicious code in devplatform-react-rest-client (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (755ebe99a58cc94ddd8953897d01f30fcbacd145f6acf635761cf08b33d4868c) On require of this package, index.js loads _ext.js, which fetches a platform-specific binary from a rotating list of Cloudflare workers.dev hosts assembled at runtime via array.join to defeat static string scanning (oob-worker.cf99-9b3.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS-TXT chunked fallback channel via *.dl.wel1.ru (sdk, ext, pkg, net). The fetched binary is written to /tmp or %TEMP% under a cover-story name impersonating.NET diagnostics tooling (dotnet_diag_<hex>.exe on Windows,.cache_<hex> on POSIX), chmod 0755 on POSIX, and spawned detached via /bin/sh -c or cmd.exe. Any consumer that requires the package on install/import receives arbitrary attacker-controlled code execution on the host. ## Source: ghsa-malware (26008a5d95840ff404c5a75362ed3d81eedbd8989fcd37a6c40441421a96dc29) 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-react-rest-client package version 35.4.8 includes malicious functionality where its index.js loads an auxiliary script (_ext.js) that fetches a platform-specific binary from a set of dynamically assembled Cloudflare workers.dev URLs to evade static detection. If the fetch fails, a DNS-TXT chunked fallback mechanism from *.dl.wel1.ru is used. The binary is stored in temporary directories under names impersonating legitimate .NET diagnostic executables and executed detached via shell commands. This results in arbitrary code execution on any system that installs or imports this package version.
Potential Impact
Any user or system that installs or imports devplatform-react-rest-client version 35.4.8 is at risk of arbitrary code execution by an attacker. This can lead to full compromise of the host environment, including unauthorized access, data theft, or further malware deployment.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately avoid installing or importing devplatform-react-rest-client version 35.4.8. Remove this package from any environments where it is present. Monitor for suspicious activity related to this package. Check vendor or repository advisories for updates or official fixes. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12740
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735739bf8831d53914e0c3
Added to database: 08/05/2026, 15:31:05 UTC
Last enriched: 08/05/2026, 16:37:12 UTC
Last updated: 09/07/2026, 22:10:11 UTC
Views: 18
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