MAL-2026-12194

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Import Source
https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/simple-date-formatter-new-2/MAL-2026-12194.json
JSON Data
https://api.osv.dev/v1/vulns/MAL-2026-12194
Published
2026-08-05T08:48:24Z
Modified
2026-08-05T10:06:17.782920163Z
Summary
Malicious code in simple-date-formatter-new-2 (npm)
Details

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

Source: amazon-inspector (1a752053edcc35b1de91b1eb5bb0a8b18e22ac32120f4b8871ecf84c3c4aec54)

The package presents itself as a trivial date-formatting utility (index.js exports a one-line wrapper around toLocaleDateString), but its package.json postinstall script runs a shell pipeline that probes sandbox and host state (tmpfs mount capability, bind-mount of /home/work, /proc/self/attr/current, LSM/AppArmor info, cgroups layout, /proc/partitions, and a listing of /home/work) and POSTs the combined output via curl to http://safjhdvsfwzhieemkdzbgr54r0yjhrmok.oast.fun/escinfo6, an interactsh/OAST out-of-band callback domain. The tarball additionally ships postinstall.js, which reads the installer's ~/.ssh directory, packages the filenames together with the local username and platform, and POSTs the JSON over HTTPS to the hardcoded IP 124.221.154.135:443/post; Chinese-language comments in that file describe stealing SSH keys and sending them to a C2. The benign facade contradicts the install-time behavior and the shipped stealer module.

Database specific 
{
    "malicious-packages-origins": [
        {
            "sha256": "1a752053edcc35b1de91b1eb5bb0a8b18e22ac32120f4b8871ecf84c3c4aec54",
            "versions": [
                "1.0.0"
            ],
            "source": "amazon-inspector",
            "modified_time": "2026-08-05T08:48:24Z",
            "import_time": "2026-08-05T09:28:09.585876852Z",
            "id": "IN-MAL-2026-014424"
        }
    ]
}
References
Credits

Affected packages

npm / simple-date-formatter-new-2

Package

Name
simple-date-formatter-new-2
View open source insights on deps.dev
Purl
pkg:npm/simple-date-formatter-new-2

Affected ranges

Affected versions

1.*
1.0.0

Database specific

indicators 
{
    "evidence_files": [
        {
            "tlsh": "5411dc50f5246e7356cd89acbc9f8545ba82ae1f29913c4cd0c7883c62c59f6407df4b",
            "path": "package.json",
            "sha256": "b4df8713cc4e79fdd7052d575cfe4c9d6458be3d21f3bb0ffb8cf3d4e3aac570"
        },
        {
            "tlsh": "273165d558f9cd3007778685639b91263102fe13650ee940f3c807a51fe9a5449f2dee",
            "path": "postinstall.js",
            "sha256": "f2be6940c08d36a7f1ce83d5fe16fefd8c14edda5d124e0f6406725beb5020ef"
        },
        {
            "tlsh": "8cc08c94a716b2866326122096a74100be5cc2300b9a6a62b88ec0c00144c12805ef8c",
            "path": "index.js",
            "sha256": "1d5404dbbd7f6a35142bc11e276bcff7b334f927a198399e6b0d9aa09ecfd098"
        }
    ],
    "package_integrity": [
        {
            "hashes": {
                "sha1": "a44d3cc574ed713882277329a70aeed6a2e38a23",
                "sha512_sri": "sha512-OnP1DE9Jb9yYV89YrkHUmyh12c3qzZGHLYW4muWp5yvL8ln61obBT4b5cEH38GSTfibkRoVXilr5lxK7hiflUA=="
            },
            "filename": "simple-date-formatter-new-2-1.0.0.tgz"
        }
    ]
}
cwes 
[
    {
        "description": "The product contains code that appears to be malicious in nature.",
        "name": "Embedded Malicious Code",
        "cweId": "CWE-506"
    }
]
source 
"https://github.com/ossf/malicious-packages/blob/main/osv/malicious/npm/simple-date-formatter-new-2/MAL-2026-12194.json"