Malicious code in bigops-storio-ngrx (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (6eb386f3b0d35ecf71762d0e719f883a3e1e207a2a3a9e1f52e7729de7753ae0) On require(), index.js loads./_ext.js which selects a per-OS asset path and downloads a binary payload from one of three runtime-assembled Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT covert-channel fallback that reassembles a base64 payload from numbered subdomains under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache_<rand> on Unix or %TEMP%\dotnet_diag_<rand>.exe on Windows, chmod 0755, and spawned detached via spawn("/bin/sh", ["-c", path + " &"]) or spawn("cmd",...). Host strings are constructed via array-split.join("") to evade static inspection, and there is no hash or signature verification. Staging paths mimic system diagnostics names to blend in. ## Source: ghsa-malware (b9e509d532bb46f434ea0a124cf22b50558357d28e0a316974709d2a7bde00dc) 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 bigops-storio-ngrx package version 35.2.2 includes malicious functionality in its index.js file, which loads an auxiliary script (_ext.js) that dynamically selects an OS-specific asset path. It downloads a binary payload from one of three Cloudflare Workers hosts or reconstructs it via a DNS TXT covert channel from multiple subdomains. The binary is saved to temporary system directories with randomized names resembling system diagnostic tools, given executable permissions, and executed detached from the parent process. Host strings are obfuscated to evade static detection, and no integrity checks (hash or signature verification) are performed on the downloaded payload.
Potential Impact
This malicious behavior allows arbitrary code execution on the host system when the package is required, potentially leading to system compromise, unauthorized access, or further malicious activities. The stealthy download and execution mechanism increases the risk of undetected infection. No known exploits in the wild have been reported yet.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Users should avoid using version 35.2.2 of bigops-storio-ngrx. Verify package integrity before installation and consider removing or replacing this package if found in your environment. Monitor for updates from the package maintainer or security advisories for any forthcoming fixes.
Malicious code in bigops-storio-ngrx (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (6eb386f3b0d35ecf71762d0e719f883a3e1e207a2a3a9e1f52e7729de7753ae0) On require(), index.js loads./_ext.js which selects a per-OS asset path and downloads a binary payload from one of three runtime-assembled Cloudflare Workers hosts (oob-worker.cf101-adf.workers.dev, oob-worker.cf100-416.workers.dev, oob-worker.cf102-baf.workers.dev), with a DNS TXT covert-channel fallback that reassembles a base64 payload from numbered subdomains under sdk.dl.wel1.ru, ext.dl.wel1.ru, pkg.dl.wel1.ru, and net.dl.wel1.ru. The fetched bytes are written to /var/tmp/.cache_<rand> on Unix or %TEMP%\dotnet_diag_<rand>.exe on Windows, chmod 0755, and spawned detached via spawn("/bin/sh", ["-c", path + " &"]) or spawn("cmd",...). Host strings are constructed via array-split.join("") to evade static inspection, and there is no hash or signature verification. Staging paths mimic system diagnostics names to blend in. ## Source: ghsa-malware (b9e509d532bb46f434ea0a124cf22b50558357d28e0a316974709d2a7bde00dc) 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 bigops-storio-ngrx package version 35.2.2 includes malicious functionality in its index.js file, which loads an auxiliary script (_ext.js) that dynamically selects an OS-specific asset path. It downloads a binary payload from one of three Cloudflare Workers hosts or reconstructs it via a DNS TXT covert channel from multiple subdomains. The binary is saved to temporary system directories with randomized names resembling system diagnostic tools, given executable permissions, and executed detached from the parent process. Host strings are obfuscated to evade static detection, and no integrity checks (hash or signature verification) are performed on the downloaded payload.
Potential Impact
This malicious behavior allows arbitrary code execution on the host system when the package is required, potentially leading to system compromise, unauthorized access, or further malicious activities. The stealthy download and execution mechanism increases the risk of undetected infection. No known exploits in the wild have been reported yet.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Users should avoid using version 35.2.2 of bigops-storio-ngrx. Verify package integrity before installation and consider removing or replacing this package if found in your environment. Monitor for updates from the package maintainer or security advisories for any forthcoming fixes.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-13253
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a738521bf8831d5394efa1e
Added to database: 08/05/2026, 18:46:57 UTC
Last enriched: 08/05/2026, 22:17:48 UTC
Last updated: 09/07/2026, 23:28:06 UTC
Views: 21
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