Malicious code in chai-as-evm (npm)
The npm package chai-as-evm version 1.1.2 contains malicious code that, when imported, downloads and executes a command-and-control (C2) dropper from a remote URL. This behavior is similar to previously observed malware in other npm packages such as chai-await-test. There is no CVSS score available for this threat.
AI Analysis
Technical Summary
The chai-as-evm package version 1.1.2 is identified as malicious because it includes code that fetches a C2 dropper from https://jsonkeeper[.]com/b/FAWPU and executes it upon import. This indicates the package is designed to perform unauthorized remote code execution by downloading and running external malware. The malicious behavior is confirmed by Amazon Inspector and is catalogued under MAL-2026-2889 and GHSA-826h-2vvx-vf77. No official patch or remediation guidance is provided in the available data.
Potential Impact
If a developer or system imports chai-as-evm version 1.1.2, the malicious code will execute, potentially allowing an attacker to run arbitrary code on the host system via the downloaded C2 dropper. This can lead to system compromise, data theft, or further malware deployment. No known exploits in the wild are reported at this time.
Mitigation Recommendations
Avoid using the chai-as-evm package version 1.1.2. Since no patch or remediation is provided, users should remove this package from their projects and replace it with a trusted alternative. Monitor dependency sources carefully to prevent inclusion of malicious packages.
Malicious code in chai-as-evm (npm)
Description
The npm package chai-as-evm version 1.1.2 contains malicious code that, when imported, downloads and executes a command-and-control (C2) dropper from a remote URL. This behavior is similar to previously observed malware in other npm packages such as chai-await-test. There is no CVSS score available for this threat.
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 chai-as-evm package version 1.1.2 is identified as malicious because it includes code that fetches a C2 dropper from https://jsonkeeper[.]com/b/FAWPU and executes it upon import. This indicates the package is designed to perform unauthorized remote code execution by downloading and running external malware. The malicious behavior is confirmed by Amazon Inspector and is catalogued under MAL-2026-2889 and GHSA-826h-2vvx-vf77. No official patch or remediation guidance is provided in the available data.
Potential Impact
If a developer or system imports chai-as-evm version 1.1.2, the malicious code will execute, potentially allowing an attacker to run arbitrary code on the host system via the downloaded C2 dropper. This can lead to system compromise, data theft, or further malware deployment. No known exploits in the wild are reported at this time.
Mitigation Recommendations
Avoid using the chai-as-evm package version 1.1.2. Since no patch or remediation is provided, users should remove this package from their projects and replace it with a trusted alternative. Monitor dependency sources carefully to prevent inclusion of malicious packages.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- MAL-2026-2889
- Osv Schema Version
- 1.7.4
- Aliases
- ["GHSA-826h-2vvx-vf77"]
- Ecosystems
- ["npm"]
Threat ID: 6a96f319acd9273b49e4973f
Added to database: 09/01/2026, 15:45:29 UTC
Last enriched: 09/08/2026, 09:07:57 UTC
Last updated: 09/10/2026, 19:38:50 UTC
Views: 4
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.