Malicious code in boxy-fixture-allure (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (ef7772152485e16aab94cf983bcc5470787d75d67bb58b6f9fd8e44e1497fcbc) boxy-fixture-allure ships an index.js that unconditionally requires./_shim on load. _shim.js reconstructs C2 hostnames via runtime string-splitting/.join() over fragments (assembling *.workers.dev CDN endpoints and a DNS TXT-record fallback under *.well1.site), fetches a platform-specific native binary, writes it to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0o755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Payload naming (dotnet_diag,.cache_, analytics_state) and the presence of opt-out environment variable checks (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) serve as cover for the drop-and-execute behavior. The fetch fires on every require() of the package, so any install or import runs attacker-controlled code on the host. ## Source: ghsa-malware (8c900b94efc137cab350c98b3fed461c9b172e9bda43ff02312f879c3f24bc71) 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 boxy-fixture-allure npm package (version 20.8.1) includes an index.js file that unconditionally requires a _shim.js script. This script dynamically reconstructs C2 hostnames using runtime string operations to assemble URLs for fetching a platform-specific native binary payload. The payload is saved to a temporary directory (/var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows), permissions are set to executable (0o755), and the binary is executed detached via shell commands. The payload uses naming conventions and environment variable checks to disguise its drop-and-execute behavior. This fetch and execution process triggers on every require() call of the package, enabling automatic execution of attacker-controlled code on any host importing or installing this package.
Potential Impact
Any system installing or importing boxy-fixture-allure version 20.8.1 will execute attacker-controlled native binaries without user consent. This leads to full remote code execution capabilities for the attacker, potentially compromising system integrity, confidentiality, and availability. The automatic execution on import or install increases the risk of widespread compromise in environments using this package.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately avoid installing or importing boxy-fixture-allure version 20.8.1. Remove the package from existing environments and replace it with trusted alternatives. Monitor for any suspicious activity related to this package. Check vendor or repository advisories for updates or fixes. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Malicious code in boxy-fixture-allure (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (ef7772152485e16aab94cf983bcc5470787d75d67bb58b6f9fd8e44e1497fcbc) boxy-fixture-allure ships an index.js that unconditionally requires./_shim on load. _shim.js reconstructs C2 hostnames via runtime string-splitting/.join() over fragments (assembling *.workers.dev CDN endpoints and a DNS TXT-record fallback under *.well1.site), fetches a platform-specific native binary, writes it to /var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows, chmods it 0o755, and spawns it detached via /bin/sh -c or cmd.exe /c start /b. Payload naming (dotnet_diag,.cache_, analytics_state) and the presence of opt-out environment variable checks (DISABLE_TELEMETRY, ANALYTICS_OPT_OUT, DO_NOT_TRACK) serve as cover for the drop-and-execute behavior. The fetch fires on every require() of the package, so any install or import runs attacker-controlled code on the host. ## Source: ghsa-malware (8c900b94efc137cab350c98b3fed461c9b172e9bda43ff02312f879c3f24bc71) 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 boxy-fixture-allure npm package (version 20.8.1) includes an index.js file that unconditionally requires a _shim.js script. This script dynamically reconstructs C2 hostnames using runtime string operations to assemble URLs for fetching a platform-specific native binary payload. The payload is saved to a temporary directory (/var/tmp/.cache_<hex> on Unix or %TEMP%\dotnet_diag_<hex>.exe on Windows), permissions are set to executable (0o755), and the binary is executed detached via shell commands. The payload uses naming conventions and environment variable checks to disguise its drop-and-execute behavior. This fetch and execution process triggers on every require() call of the package, enabling automatic execution of attacker-controlled code on any host importing or installing this package.
Potential Impact
Any system installing or importing boxy-fixture-allure version 20.8.1 will execute attacker-controlled native binaries without user consent. This leads to full remote code execution capabilities for the attacker, potentially compromising system integrity, confidentiality, and availability. The automatic execution on import or install increases the risk of widespread compromise in environments using this package.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately avoid installing or importing boxy-fixture-allure version 20.8.1. Remove the package from existing environments and replace it with trusted alternatives. Monitor for any suspicious activity related to this package. Check vendor or repository advisories for updates or 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-2026-12342
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a73574dbf8831d53915a4df
Added to database: 08/05/2026, 15:31:25 UTC
Last enriched: 08/05/2026, 17:44:57 UTC
Last updated: 09/07/2026, 22:26:48 UTC
Views: 20
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