Malicious code in bigops-storio-store-adapter (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7b6c9395cd17d3e76a94ed855d2d585fdb597785eac2cfefe873f79fc2b98d58) On require of the package, index.js loads _bridge.js which selects a platform-specific binary path and downloads an opaque native binary from author-controlled Cloudflare Workers hosts whose names are reconstructed at runtime by array-join to evade static analysis (oob-worker.cf99-9b3.workers.dev, cf101-adf.workers.dev, cf103-070.workers.dev), with a DNS-TXT chunk fallback under *.dl.wel1.ru. The binary is written under /var/tmp or %TEMP% with cover-story filenames (dotnet_diag_<hex>.exe,.cache_<hex>), chmod 0755'd, and detached-spawned via cmd.exe/start or /bin/sh -c. A cache stamp under /tmp/.analytics_* is used to avoid re-execution. There is no hash or signature verification, the destination hosts do not match the package publisher, and the module is named _bridge.js with cover-story identifiers (analytics_state, dotnet_diag). An additional 81KB lib/telemetry.js file (not reached from the main entry in this tarball) contains structurally identical dropper primitives (base64 chunk assembly, cp.spawn('/bin/sh',['-c', filePath+' &']), chmodSync 0755, ServiceDiscovery/WorkerHost classes) as a reserve/variant payload. ## Source: ghsa-malware (38c30d337fab24b6a256052b43b781533ef8d53de907658c4f8348ed8970319c) 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-store-adapter npm package (version 35.9.8) includes a malicious module (_bridge.js) that dynamically reconstructs URLs to download a native binary from suspicious Cloudflare Workers domains and a fallback DNS-TXT source. This binary is saved under temporary directories with cover-story filenames, given executable permissions, and executed detached from the main process. The package lacks any hash or signature verification for the downloaded binary, and the hosting domains are unrelated to the package publisher. Additionally, the package contains a telemetry.js file with structurally similar dropper code, indicating a reserve or variant payload. These behaviors indicate the package is a malicious dropper designed to execute unauthorized native code on the host system.
Potential Impact
If installed and required, this package can execute arbitrary native code on the host system without user consent or verification, potentially leading to full system compromise. The malicious binary is downloaded from attacker-controlled infrastructure, bypassing typical supply chain trust. The lack of signature verification and use of obfuscation techniques increase the risk of undetected execution of malicious payloads.
Mitigation Recommendations
No official patch or remediation is currently documented for this package version. Users should avoid installing or using bigops-storio-store-adapter version 35.9.8. Remove any installations of this package from projects and dependency trees. Monitor for any unexpected binaries or processes spawned from temporary directories with suspicious filenames. Consider using trusted package sources and supply chain security tools to detect and block malicious packages.
Malicious code in bigops-storio-store-adapter (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (7b6c9395cd17d3e76a94ed855d2d585fdb597785eac2cfefe873f79fc2b98d58) On require of the package, index.js loads _bridge.js which selects a platform-specific binary path and downloads an opaque native binary from author-controlled Cloudflare Workers hosts whose names are reconstructed at runtime by array-join to evade static analysis (oob-worker.cf99-9b3.workers.dev, cf101-adf.workers.dev, cf103-070.workers.dev), with a DNS-TXT chunk fallback under *.dl.wel1.ru. The binary is written under /var/tmp or %TEMP% with cover-story filenames (dotnet_diag_<hex>.exe,.cache_<hex>), chmod 0755'd, and detached-spawned via cmd.exe/start or /bin/sh -c. A cache stamp under /tmp/.analytics_* is used to avoid re-execution. There is no hash or signature verification, the destination hosts do not match the package publisher, and the module is named _bridge.js with cover-story identifiers (analytics_state, dotnet_diag). An additional 81KB lib/telemetry.js file (not reached from the main entry in this tarball) contains structurally identical dropper primitives (base64 chunk assembly, cp.spawn('/bin/sh',['-c', filePath+' &']), chmodSync 0755, ServiceDiscovery/WorkerHost classes) as a reserve/variant payload. ## Source: ghsa-malware (38c30d337fab24b6a256052b43b781533ef8d53de907658c4f8348ed8970319c) 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
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The bigops-storio-store-adapter npm package (version 35.9.8) includes a malicious module (_bridge.js) that dynamically reconstructs URLs to download a native binary from suspicious Cloudflare Workers domains and a fallback DNS-TXT source. This binary is saved under temporary directories with cover-story filenames, given executable permissions, and executed detached from the main process. The package lacks any hash or signature verification for the downloaded binary, and the hosting domains are unrelated to the package publisher. Additionally, the package contains a telemetry.js file with structurally similar dropper code, indicating a reserve or variant payload. These behaviors indicate the package is a malicious dropper designed to execute unauthorized native code on the host system.
Potential Impact
If installed and required, this package can execute arbitrary native code on the host system without user consent or verification, potentially leading to full system compromise. The malicious binary is downloaded from attacker-controlled infrastructure, bypassing typical supply chain trust. The lack of signature verification and use of obfuscation techniques increase the risk of undetected execution of malicious payloads.
Mitigation Recommendations
No official patch or remediation is currently documented for this package version. Users should avoid installing or using bigops-storio-store-adapter version 35.9.8. Remove any installations of this package from projects and dependency trees. Monitor for any unexpected binaries or processes spawned from temporary directories with suspicious filenames. Consider using trusted package sources and supply chain security tools to detect and block malicious packages.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-13256
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a738521bf8831d5394efa15
Added to database: 08/05/2026, 18:46:57 UTC
Last enriched: 08/05/2026, 22:18:05 UTC
Last updated: 09/07/2026, 22:26:14 UTC
Views: 19
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.