Malicious code in devplatform-select-fields (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (25bec256fbaf68018dbca1fad82b3616a04cf8d932b67e30b5164ee74dfc4882) [email protected] executes a binary dropper on any require() of the package. index.js loads _shim.js, which reconstructs C2 hostnames from split string fragments (Cloudflare Workers hosts of the form oob-worker.cf*-*.workers.dev, plus *.dl.wel1.ru), downloads a platform-specific payload over HTTPS, and falls back to a covert DNS TXT channel (reads a count from c.<domain> and reassembles a base64 payload from numbered TXT records). The payload is written to /var/tmp or %TEMP% under cover-story names (.cache_<rand>, dotnet_diag_<rand>.exe), chmod 0755'd, and spawned detached via spawn("/bin/sh", ["-c", fp + " &"]) or spawn("cmd",...). No hash or signature verification is performed. A setup() gate honors DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK and writes an.analytics_state cool-down stamp (22583s) to suppress re-execution, framing the dropper as telemetry. Hostname string-splitting and the DNS-TXT reassembly path are anti-analysis measures. The package name resembles unrelated legitimate packages but the shipped code performs no advertised functionality. ## Source: ghsa-malware (65ad66039e3b7f7982e6539751ee90ae748d1de73569af1765aa15b4d1e0879a) 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-select-fields npm package at version 35.2.6 includes a malicious binary dropper triggered on require(). It reconstructs C2 hostnames from split string fragments, targeting Cloudflare Workers and other domains, to download a payload over HTTPS. If that fails, it uses a covert DNS TXT record channel to reassemble a base64-encoded payload. The payload is saved to /var/tmp or %TEMP% with deceptive filenames, permissions are set to executable, and it is spawned detached via shell commands. The dropper respects environment variables to suppress repeated execution, framing itself as telemetry. Anti-analysis techniques include hostname string splitting and DNS TXT reassembly. The package name mimics legitimate packages but contains no legitimate functionality. No official patch or fix is indicated.
Potential Impact
This malicious package can execute arbitrary code on any system that installs and requires it, potentially leading to unauthorized remote code execution and system compromise. The payload is delivered covertly and executed with minimal detection, posing a significant risk to affected environments. There is no indication of active exploitation in the wild yet.
Mitigation Recommendations
No official patch or remediation is currently available. Users should avoid installing or using devplatform-select-fields version 35.2.6. Remove the package from any environments where it is present. Monitor for any unexpected processes or files matching the described behavior. Verify package integrity before installation and prefer trusted sources. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for updates.
Malicious code in devplatform-select-fields (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (25bec256fbaf68018dbca1fad82b3616a04cf8d932b67e30b5164ee74dfc4882) [email protected] executes a binary dropper on any require() of the package. index.js loads _shim.js, which reconstructs C2 hostnames from split string fragments (Cloudflare Workers hosts of the form oob-worker.cf*-*.workers.dev, plus *.dl.wel1.ru), downloads a platform-specific payload over HTTPS, and falls back to a covert DNS TXT channel (reads a count from c.<domain> and reassembles a base64 payload from numbered TXT records). The payload is written to /var/tmp or %TEMP% under cover-story names (.cache_<rand>, dotnet_diag_<rand>.exe), chmod 0755'd, and spawned detached via spawn("/bin/sh", ["-c", fp + " &"]) or spawn("cmd",...). No hash or signature verification is performed. A setup() gate honors DISABLE_TELEMETRY/ANALYTICS_OPT_OUT/DO_NOT_TRACK and writes an.analytics_state cool-down stamp (22583s) to suppress re-execution, framing the dropper as telemetry. Hostname string-splitting and the DNS-TXT reassembly path are anti-analysis measures. The package name resembles unrelated legitimate packages but the shipped code performs no advertised functionality. ## Source: ghsa-malware (65ad66039e3b7f7982e6539751ee90ae748d1de73569af1765aa15b4d1e0879a) 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-select-fields npm package at version 35.2.6 includes a malicious binary dropper triggered on require(). It reconstructs C2 hostnames from split string fragments, targeting Cloudflare Workers and other domains, to download a payload over HTTPS. If that fails, it uses a covert DNS TXT record channel to reassemble a base64-encoded payload. The payload is saved to /var/tmp or %TEMP% with deceptive filenames, permissions are set to executable, and it is spawned detached via shell commands. The dropper respects environment variables to suppress repeated execution, framing itself as telemetry. Anti-analysis techniques include hostname string splitting and DNS TXT reassembly. The package name mimics legitimate packages but contains no legitimate functionality. No official patch or fix is indicated.
Potential Impact
This malicious package can execute arbitrary code on any system that installs and requires it, potentially leading to unauthorized remote code execution and system compromise. The payload is delivered covertly and executed with minimal detection, posing a significant risk to affected environments. There is no indication of active exploitation in the wild yet.
Mitigation Recommendations
No official patch or remediation is currently available. Users should avoid installing or using devplatform-select-fields version 35.2.6. Remove the package from any environments where it is present. Monitor for any unexpected processes or files matching the described behavior. Verify package integrity before installation and prefer trusted sources. Patch status is not yet confirmed — check the vendor advisory or npm security advisories for updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12751
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735739bf8831d53914f730
Added to database: 08/05/2026, 15:31:05 UTC
Last enriched: 08/05/2026, 16:39:44 UTC
Last updated: 09/08/2026, 00:12:32 UTC
Views: 16
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