Malicious code in beaver-ui-side-navigation (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (868e87654c2af06a8362918fbcd52680c253a85063f1a0c7fc71494b0cfd304d) On require()/import of the package, index.js unconditionally loads _helpers.js which fetches a platform-specific binary from attacker-controlled Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with DNS-TXT-based fallback via *.dl.wel1.ru subdomains. Host names and sensitive API identifiers (child_process, chmodSync) are assembled at runtime from split string fragments via.join("") to evade static detection. The fetched opaque binary is written to /tmp or %TEMP% under cover names (.cache_<rand> on Unix, dotnet_diag_<rand>.exe on Windows), chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe with no hash or signature verification. A cover-story telemetry framing (DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env checks,.analytics_state marker file) accompanies the dropper. lib/telemetry.js contains a second implementation of the same fetch-write-chmod-spawn pattern. The name resembles a legitimate UI component package but the code has no UI functionality. ## Source: ghsa-malware (1c7e152f4dd2321e9c855b7658a7eca2e365c9260f0a7d962d0bd7e6359db6a7) 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 beaver-ui-side-navigation npm package version 35.7.1 is a malicious package that, when required or imported, loads a helper script which fetches a platform-specific opaque binary from attacker-controlled Cloudflare Workers domains and fallback DNS TXT records. The binary is saved to temporary directories under disguised filenames, permissions are set to executable, and it is executed detached via shell commands without any integrity checks. The package uses runtime string assembly to hide sensitive API calls such as child_process and chmodSync. Additional telemetry code attempts to mask the malicious behavior. The package name mimics a legitimate UI component but contains no UI code.
Potential Impact
This malicious package can execute arbitrary code on the host system with the permissions of the user running the Node.js process. The dropped binary is opaque and attacker-controlled, potentially enabling a wide range of malicious activities including system compromise, data exfiltration, or persistence. The lack of signature verification and obfuscation techniques increase the risk of undetected compromise.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately remove the beaver-ui-side-navigation package version 35.7.1 from their projects and replace it with a trusted alternative. Audit dependencies for this package and any related malicious code. Monitor for unusual process executions originating from Node.js environments. Check vendor advisories or trusted security sources for updates or fixes regarding this package.
Malicious code in beaver-ui-side-navigation (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (868e87654c2af06a8362918fbcd52680c253a85063f1a0c7fc71494b0cfd304d) On require()/import of the package, index.js unconditionally loads _helpers.js which fetches a platform-specific binary from attacker-controlled Cloudflare Workers hosts (oob-worker.cf99-9b3.workers.dev, oob-worker.cf103-070.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf101-adf.workers.dev) with DNS-TXT-based fallback via *.dl.wel1.ru subdomains. Host names and sensitive API identifiers (child_process, chmodSync) are assembled at runtime from split string fragments via.join("") to evade static detection. The fetched opaque binary is written to /tmp or %TEMP% under cover names (.cache_<rand> on Unix, dotnet_diag_<rand>.exe on Windows), chmod 0755'd, and spawned detached via /bin/sh -c or cmd.exe with no hash or signature verification. A cover-story telemetry framing (DISABLE_TELEMETRY / ANALYTICS_OPT_OUT / DO_NOT_TRACK env checks,.analytics_state marker file) accompanies the dropper. lib/telemetry.js contains a second implementation of the same fetch-write-chmod-spawn pattern. The name resembles a legitimate UI component package but the code has no UI functionality. ## Source: ghsa-malware (1c7e152f4dd2321e9c855b7658a7eca2e365c9260f0a7d962d0bd7e6359db6a7) 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 beaver-ui-side-navigation npm package version 35.7.1 is a malicious package that, when required or imported, loads a helper script which fetches a platform-specific opaque binary from attacker-controlled Cloudflare Workers domains and fallback DNS TXT records. The binary is saved to temporary directories under disguised filenames, permissions are set to executable, and it is executed detached via shell commands without any integrity checks. The package uses runtime string assembly to hide sensitive API calls such as child_process and chmodSync. Additional telemetry code attempts to mask the malicious behavior. The package name mimics a legitimate UI component but contains no UI code.
Potential Impact
This malicious package can execute arbitrary code on the host system with the permissions of the user running the Node.js process. The dropped binary is opaque and attacker-controlled, potentially enabling a wide range of malicious activities including system compromise, data exfiltration, or persistence. The lack of signature verification and obfuscation techniques increase the risk of undetected compromise.
Mitigation Recommendations
No official patch or remediation is currently documented. Users should immediately remove the beaver-ui-side-navigation package version 35.7.1 from their projects and replace it with a trusted alternative. Audit dependencies for this package and any related malicious code. Monitor for unusual process executions originating from Node.js environments. Check vendor advisories or trusted security sources for updates or fixes regarding this package.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12823
- Osv Schema Version
- 1.7.4
- Aliases
- []
- Ecosystems
- ["npm"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a738536bf8831d5394f0c01
Added to database: 08/05/2026, 18:47:18 UTC
Last enriched: 08/05/2026, 18:58:04 UTC
Last updated: 08/16/2026, 19:58:46 UTC
Views: 38
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