Malicious code in devplatform-jscodeshift-utils (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (3b08e96920cfa51b02e6ac450e73eb86615b96651f96cd8c94f0f272880689b9) The package presents itself as a jscodeshift helper library exporting deepMerge/sleep/retry/chunk utilities, but index.js unconditionally invokes `try { require('./_bootstrap'); } catch (_) {}` on module load, hiding the malicious side effect behind a swallowed exception. _bootstrap.js selects a platform-specific payload path, downloads bytes from one of three hardcoded Cloudflare Workers hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev) — with a DNS-TXT fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru — writes the payload to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0755, and spawns it detached via `/bin/sh -c "<path> &"` or `cmd /c start`. Destination hostnames are reconstructed at runtime by array-joining split literals to evade static inspection, and cache/payload filenames (`analytics_state`, `dotnet_diag_<hex>.exe`) are chosen to blend in with legitimate telemetry artifacts. An 80KB lib/telemetry.js is shipped but never referenced from index.js, consistent with cover-story padding. Requiring or installing this package causes attacker-controlled native code to execute on the developer's host. ## Source: ghsa-malware (d662b5ea3e0d9ad955f194ab74515a958541234a800ca195728a1b464ce67ee7) 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-jscodeshift-utils npm package (version 35.3.8) masquerades as a utility library but includes malicious code that triggers on module load. It attempts to require a hidden '_bootstrap.js' script, which downloads a native payload from multiple obfuscated Cloudflare Workers domains or fallback DNS-TXT sources. The payload is saved to temporary directories with names designed to blend in with legitimate telemetry files, then executed detached via shell commands. The package includes unused telemetry.js code likely intended as cover. This results in attacker-controlled native code execution on the host system simply by installing or requiring the package.
Potential Impact
This malicious package enables remote attackers to execute arbitrary native code on the developer's host system without user consent or interaction beyond installing or requiring the package. This can lead to full system compromise, data theft, persistence, or further malware deployment. The attack is stealthy, using obfuscated domain names and legitimate-looking filenames to evade detection.
Mitigation Recommendations
No official patch or remediation is currently documented for this malicious package. Users should immediately remove devplatform-jscodeshift-utils version 35.3.8 from their environments and avoid installing or requiring it. Conduct a thorough investigation for potential compromise on any systems where this package was used. Employ supply chain security best practices such as verifying package provenance and using trusted sources. Monitor for updates from npm or security vendors regarding remediation or takedown of this package.
Malicious code in devplatform-jscodeshift-utils (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (3b08e96920cfa51b02e6ac450e73eb86615b96651f96cd8c94f0f272880689b9) The package presents itself as a jscodeshift helper library exporting deepMerge/sleep/retry/chunk utilities, but index.js unconditionally invokes `try { require('./_bootstrap'); } catch (_) {}` on module load, hiding the malicious side effect behind a swallowed exception. _bootstrap.js selects a platform-specific payload path, downloads bytes from one of three hardcoded Cloudflare Workers hostnames (oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev) — with a DNS-TXT fallback via sdk.dl.wel1.ru / ext.dl.wel1.ru / pkg.dl.wel1.ru / net.dl.wel1.ru — writes the payload to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0755, and spawns it detached via `/bin/sh -c "<path> &"` or `cmd /c start`. Destination hostnames are reconstructed at runtime by array-joining split literals to evade static inspection, and cache/payload filenames (`analytics_state`, `dotnet_diag_<hex>.exe`) are chosen to blend in with legitimate telemetry artifacts. An 80KB lib/telemetry.js is shipped but never referenced from index.js, consistent with cover-story padding. Requiring or installing this package causes attacker-controlled native code to execute on the developer's host. ## Source: ghsa-malware (d662b5ea3e0d9ad955f194ab74515a958541234a800ca195728a1b464ce67ee7) 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-jscodeshift-utils npm package (version 35.3.8) masquerades as a utility library but includes malicious code that triggers on module load. It attempts to require a hidden '_bootstrap.js' script, which downloads a native payload from multiple obfuscated Cloudflare Workers domains or fallback DNS-TXT sources. The payload is saved to temporary directories with names designed to blend in with legitimate telemetry files, then executed detached via shell commands. The package includes unused telemetry.js code likely intended as cover. This results in attacker-controlled native code execution on the host system simply by installing or requiring the package.
Potential Impact
This malicious package enables remote attackers to execute arbitrary native code on the developer's host system without user consent or interaction beyond installing or requiring the package. This can lead to full system compromise, data theft, persistence, or further malware deployment. The attack is stealthy, using obfuscated domain names and legitimate-looking filenames to evade detection.
Mitigation Recommendations
No official patch or remediation is currently documented for this malicious package. Users should immediately remove devplatform-jscodeshift-utils version 35.3.8 from their environments and avoid installing or requiring it. Conduct a thorough investigation for potential compromise on any systems where this package was used. Employ supply chain security best practices such as verifying package provenance and using trusted sources. Monitor for updates from npm or security vendors regarding remediation or takedown of this package.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12719
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735738bf8831d53914b505
Added to database: 08/05/2026, 15:31:04 UTC
Last enriched: 08/05/2026, 16:33:34 UTC
Last updated: 09/18/2026, 02:22:32 UTC
Views: 22
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