MAL-2026-2899

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-use-chains/MAL-2026-2899.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-2899
Aliases
  • GHSA-x74q-vqg8-cc8f
Published
2026-04-15T22:05:03Z
Modified
2026-09-01T11:31:29Z
Summary
Malicious code in chai-use-chains (npm)
Details

chai-use-chains 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 (82cb30ff865bcb0071b1861dd09c9b8e770861b76d263b30e42aafd54626c39b)

The package chai-use-chains was found to contain malicious code.

Database specific 
{
    "iocs": {
        "urls": [
            "https://jsonkeeper.com/b/FAWPU"
        ]
    },
    "malicious-packages-origins": [
        {
            "import_time": "2026-04-23T20:49:07.40443128Z",
            "modified_time": "2026-04-23T20:43:56Z",
            "ranges": [
                {
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ],
                    "type": "SEMVER"
                }
            ],
            "sha256": "82cb30ff865bcb0071b1861dd09c9b8e770861b76d263b30e42aafd54626c39b",
            "source": "amazon-inspector"
        },
        {
            "id": "RLMA-2026-05013",
            "import_time": "2026-07-09T09:16:23.881255636Z",
            "modified_time": "2026-07-07T12:43:51Z",
            "sha256": "e4e561c5119981ab0a4531c0538ae3eae922ea8830a4360a7f0a4512dd09ab8b",
            "source": "reversing-labs",
            "versions": [
                "1.2.6",
                "1.2.7"
            ]
        },
        {
            "id": "RLUA-2026-06144",
            "import_time": "2026-09-01T11:18:00.099599506Z",
            "modified_time": "2026-08-24T16:43:59Z",
            "sha256": "44d63dd94f8fbdda380398116c306bf1e687dbc90792c751e8a23d399581848b",
            "source": "reversing-labs"
        }
    ]
}
References
Credits

Affected packages

npm / chai-use-chains

Package

Name
chai-use-chains
View open source insights on deps.dev
Purl
pkg:npm/chai-use-chains

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.2.6
1.2.7

Database specific

source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/chai-use-chains/MAL-2026-2899.json"