MAL-2026-13697

See a problem?
Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/simple-date-formatter-new-10/MAL-2026-13697.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-13697
Published
2026-08-10T11:53:39Z
Modified
2026-08-10T12:50:28.630655896Z
Summary
Malicious code in simple-date-formatter-new-10 (npm)
Details

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

Source: amazon-inspector (c1cc0707c5a58067075648ef1c040ceeb07c2550b9f06d53b5c8c41ec167c841)

simple-date-formatter-new-10@1.0.0 presents itself as a trivial date-formatting utility but ships two attack payloads that fire when npm installs the package. The package.json postinstall script opens an interactive bash reverse shell over /dev/tcp to 124.221.154.135:4444, giving the publisher remote command execution on the installer's host. A bundled postinstall.js reads the installer's ~/.ssh directory and POSTs its contents together with username and platform to https://124.221.154.135/post, the same C2 endpoint. The advertised date-formatting API (index.js exporting formatDate) is a cover story for the reverse-shell and SSH-key-theft payloads.

Database specific 
{
    "malicious-packages-origins": [
        {
            "id": "IN-MAL-2026-017229",
            "import_time": "2026-08-10T12:24:44.057145262Z",
            "sha256": "c1cc0707c5a58067075648ef1c040ceeb07c2550b9f06d53b5c8c41ec167c841",
            "versions": [
                "1.0.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-10T11:53:39Z"
        }
    ]
}
References
Credits

Affected packages

npm / simple-date-formatter-new-10

Package

Name
simple-date-formatter-new-10
View open source insights on deps.dev
Purl
pkg:npm/simple-date-formatter-new-10

Affected ranges

Affected versions

1.*
1.0.0

Database specific

cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
indicators 
{
    "evidence_files": [
        {
            "path": "package.json",
            "tlsh": "c1e07d40cd208c7326c185bd855285026b18ee1f00003d0db39b1609a79fe7355fc70e",
            "sha256": "5d17ead0cfd3f403ba2b3dd92a1a4713ecc159c7af346c0c2373cde4b44118ef"
        },
        {
            "path": "postinstall.js",
            "tlsh": "273165d558f9cd3007778685639b91263102fe13650ee940f3c807a51fe9a5449f2dee",
            "sha256": "f2be6940c08d36a7f1ce83d5fe16fefd8c14edda5d124e0f6406725beb5020ef"
        }
    ],
    "package_integrity": [
        {
            "filename": "simple-date-formatter-new-10-1.0.0.tgz",
            "hashes": {
                "sha1": "5f1762fc3e8d99f0f7653ecce53fa07d3c60ce76",
                "sha512_sri": "sha512-JFRe2l95Y6b7mr98e9yjIbGRGZHYghkDFNeamdoClnF40lbwehrW9ZYe9x6q5s3hiEWuoIFgo8rrOWoKRLXFTA=="
            }
        }
    ]
}
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/simple-date-formatter-new-10/MAL-2026-13697.json"