MAL-2026-2889

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Import Source

https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-evm/MAL-2026-2889.json

JSON Data

https://api.osv.dev/v1/vulns/MAL-2026-2889

Published

2026-04-15T22:05:03Z

Modified

2026-04-23T21:14:00.700833Z

Summary

Malicious code in chai-as-evm (npm)

Details

chai-as-evm is a malicious npm package that when imported downloads a C2 dropper from https://jsonkeeper[.]com/b/FAWPU and executes it (similar to malware in to chai-await-test).

-= Per source details. Do not edit below this line.=-

Source: amazon-inspector (022142050af16941071ae35d9336fdbfda3482fde1d22711c0d7cb231cac513a)

The package chai-as-evm was found to contain malicious code.

Database specific

{
    "malicious-packages-origins": [
        {
            "modified_time": "2026-04-23T20:43:56Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "022142050af16941071ae35d9336fdbfda3482fde1d22711c0d7cb231cac513a",
            "source": "amazon-inspector",
            "import_time": "2026-04-23T20:49:16.236612219Z"
        }
    ],
    "iocs": {
        "urls": [
            "https://jsonkeeper.com/b/FAWPU"
        ]
    }
}

References

https://www.indece.com/en-US/blog/7df041ba-feb1-4d87-918b-7fc2c709d805

Credits

- Amazon Inspector - FINDER
- - actran@amazon.com
- indece - FINDER
- - https://indece.com

Affected packages

npm / chai-as-evm

Package

Name: chai-as-evm; View open source insights on deps.dev
Purl: pkg:npm/chai-as-evm

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Database specific

source

"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-as-evm/MAL-2026-2889.json"