MAL-2026-4436

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@service-suppliers/select-supplier-watcher-saga/MAL-2026-4436.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-4436
Aliases
  • GHSA-3f9q-2rjw-5grc
Published
2026-05-25T18:07:57Z
Modified
2026-05-28T15:31:49.283471258Z
Summary
Malicious code in @service-suppliers/select-supplier-watcher-saga (npm)
Details

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

Source: amazon-inspector (3829c1a8be4ed51ad5c9d714d223cb037f7d76df868b73e63c69c6c60ff8dbf3)

On npm install, scripts/postinstall.js fetches a platform-specific script from https://oob.moika.tech/payload/{linux|mac|win}, writes it to the OS temp directory as ._service-suppliers_init.{sh,bat}, chmods 0755, and detached-spawns it via /bin/sh or cmd.exe — an unpinned, unauthenticated remote-code-execution channel where the attacker controls every byte run on the installer's machine. The same script iterates process.env against a list of credential-shaped keys (npmtoken, npmconfigauthtoken, awsaccesskeyid, awssecretaccesskey, awssessiontoken, githubtoken, artifactorytoken, nexustoken, nodeauthtoken, npmconfig_auth) and reads ~/.npmrc, /etc/npmrc,./.npmrc, and../.npmrc, then POSTs the collected secrets together with hostname, username, platform, cwd, node/npm versions, PATH, npm registry config, and CI flags to https://oob.moika.tech/report with an X-Secret header. The package self-describes as an 'Internal configuration loader' on a non-existent homepage and squats the @service-suppliers npm scope as a dependency-confusion lure; an in-source comment labels it a 'dependency confusion payload'. Even the author's claim of 'authorized testing' does not change the installer impact: anyone who installs the package experiences full RCE plus credential exfiltration to an attacker-controlled host.

Source: ghsa-malware (a3fda50554d3f545b0e2b578afa383383215f1754d047ee41692bd092f600dbe)

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-2026-004746",
            "import_time": "2026-05-26T05:53:12.244096323Z",
            "sha256": "15f8804a011b27dc3ebb9c56e9e3d0bf34bfbd3724e54455678ea64db7c9b76e",
            "source": "amazon-inspector",
            "modified_time": "2026-05-25T18:10:10Z",
            "versions": [
                "9.9.10"
            ]
        },
        {
            "id": "IN-MAL-2026-004740",
            "import_time": "2026-05-26T05:53:11.566426492Z",
            "sha256": "3829c1a8be4ed51ad5c9d714d223cb037f7d76df868b73e63c69c6c60ff8dbf3",
            "source": "amazon-inspector",
            "modified_time": "2026-05-25T18:07:57Z",
            "versions": [
                "9.9.10"
            ]
        },
        {
            "ranges": [
                {
                    "type": "SEMVER",
                    "events": [
                        {
                            "introduced": "0"
                        }
                    ]
                }
            ],
            "id": "GHSA-3f9q-2rjw-5grc",
            "import_time": "2026-05-28T15:25:19.322846918Z",
            "sha256": "a3fda50554d3f545b0e2b578afa383383215f1754d047ee41692bd092f600dbe",
            "source": "ghsa-malware",
            "modified_time": "2026-05-28T13:39:50Z"
        }
    ]
}
References
Credits

Affected packages

npm / @service-suppliers/select-supplier-watcher-saga

Package

Name
@service-suppliers/select-supplier-watcher-saga
View open source insights on deps.dev
Purl
pkg:npm/%40service-suppliers%2Fselect-supplier-watcher-saga

Affected ranges

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

Affected versions

9.*
9.9.10

Database specific

cwes 
[
    {
        "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"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "scripts/postinstall.js",
            "sha256": "a984b3129e5a5f8ac193e4137c8fa64376603208038cf83117f292b5a485f5e6",
            "tlsh": "94d1ccdb62f7553406d6a5ead91b6412d623b1033906f8e0f65c51005f8a9ac8173eed"
        }
    ],
    "package_integrity": [
        {
            "filename": "select-supplier-watcher-saga-9.9.10.tgz",
            "hashes": {
                "sha512_sri": "sha512-/JIT6yfNC1lCtNXiwWjkfef5WLOrVAshZKpaoVhY8oWVNuOPWBPnKfDg69nmFny6q3upzGJ3h9QDsXy0pJvNGQ==",
                "sha1": "a450f46a500a31a5128d588069156dc229d7b2ef"
            }
        }
    ],
    "domains": [
        "oob.moika.tech"
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/@service-suppliers/select-supplier-watcher-saga/MAL-2026-4436.json"