Malicious code in eventea-diag (npm)
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9941ff32c3b2d52ea7b7cccd4af391bfe359cf3766c4f22c484d1a51e178ab6c) On require of the package, index.js loads _shim.js which downloads a platform-specific binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT base64 fallback to dl.well1.site, writes the bytes to a hidden temp file, chmods 755, and spawns it detached via /bin/sh -c or cmd. Host strings and dangerous APIs are assembled from split fragments at runtime (e.g. ["oob-worker.cf102-baf",".w","or","ke","rs",".d","ev"].join(""), require("child_"+"process"), fs["chmod"+"Sync"]) to hide the destinations and primitives from static analysis. Cover-story naming (analytics_state, dotnet_diag_*.exe,.cache_*) does not match the package's stated pub/sub adapter purpose. A second dropper implementation with the same pattern is bundled as lib/telemetry.js (81KB) framed as an 'Analytics SDK'. There is no pinning, no signature verification, and the delivery hosts are anonymous Cloudflare Workers subdomains unrelated to any declared publisher. ## Source: ghsa-malware (f50f3b0e728e475ae1632ffe36294b2f132bd392b3f8878fe8b7f1a5627ccd08) 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 eventea-diag npm package (version 20.5.3) includes malicious functionality where its index.js loads a shim.js script that downloads platform-specific binaries from hardcoded, anonymous Cloudflare Workers subdomains. These binaries are written to hidden temporary files, permissions are set to executable, and they are spawned detached via shell commands. The package uses runtime string assembly to evade static analysis and disguises the malicious binaries with misleading filenames. Additionally, a second dropper is embedded in lib/telemetry.js, framed as an 'Analytics SDK'. There is no pinning or signature verification of the downloaded binaries, and the delivery hosts are unrelated to the declared publisher, indicating a supply chain compromise or malicious intent.
Potential Impact
This malicious package can execute arbitrary code on the host system by downloading and running unsigned binaries from untrusted sources. This can lead to full system compromise, unauthorized data access, or further malware deployment. The obfuscation and lack of integrity checks increase the risk of undetected exploitation.
Mitigation Recommendations
No official patch or remediation is currently available. Users should immediately stop using eventea-diag version 20.5.3 and remove it from their environments. Avoid installing or running this package until a trusted, verified version is released. Monitor for any unexpected network connections or processes spawned by this package. Verify package integrity and source before installation in the future.
Malicious code in eventea-diag (npm)
Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (9941ff32c3b2d52ea7b7cccd4af391bfe359cf3766c4f22c484d1a51e178ab6c) On require of the package, index.js loads _shim.js which downloads a platform-specific binary from hardcoded Cloudflare Workers subdomains (oob-worker.cf102-baf.workers.dev, oob-worker.cf101-adf.workers.dev, oob-worker.cf99-9b3.workers.dev) with a DNS-TXT base64 fallback to dl.well1.site, writes the bytes to a hidden temp file, chmods 755, and spawns it detached via /bin/sh -c or cmd. Host strings and dangerous APIs are assembled from split fragments at runtime (e.g. ["oob-worker.cf102-baf",".w","or","ke","rs",".d","ev"].join(""), require("child_"+"process"), fs["chmod"+"Sync"]) to hide the destinations and primitives from static analysis. Cover-story naming (analytics_state, dotnet_diag_*.exe,.cache_*) does not match the package's stated pub/sub adapter purpose. A second dropper implementation with the same pattern is bundled as lib/telemetry.js (81KB) framed as an 'Analytics SDK'. There is no pinning, no signature verification, and the delivery hosts are anonymous Cloudflare Workers subdomains unrelated to any declared publisher. ## Source: ghsa-malware (f50f3b0e728e475ae1632ffe36294b2f132bd392b3f8878fe8b7f1a5627ccd08) 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 eventea-diag npm package (version 20.5.3) includes malicious functionality where its index.js loads a shim.js script that downloads platform-specific binaries from hardcoded, anonymous Cloudflare Workers subdomains. These binaries are written to hidden temporary files, permissions are set to executable, and they are spawned detached via shell commands. The package uses runtime string assembly to evade static analysis and disguises the malicious binaries with misleading filenames. Additionally, a second dropper is embedded in lib/telemetry.js, framed as an 'Analytics SDK'. There is no pinning or signature verification of the downloaded binaries, and the delivery hosts are unrelated to the declared publisher, indicating a supply chain compromise or malicious intent.
Potential Impact
This malicious package can execute arbitrary code on the host system by downloading and running unsigned binaries from untrusted sources. This can lead to full system compromise, unauthorized data access, or further malware deployment. The obfuscation and lack of integrity checks increase the risk of undetected exploitation.
Mitigation Recommendations
No official patch or remediation is currently available. Users should immediately stop using eventea-diag version 20.5.3 and remove it from their environments. Avoid installing or running this package until a trusted, verified version is released. Monitor for any unexpected network connections or processes spawned by this package. Verify package integrity and source before installation in the future.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-12373
- Osv Schema Version
- 1.7.4
- Ecosystems
- ["npm"]
Threat ID: 6a735746bf8831d539159f79
Added to database: 08/05/2026, 15:31:18 UTC
Last enriched: 08/05/2026, 17:27:14 UTC
Last updated: 09/15/2026, 00:03:32 UTC
Views: 20
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.