william-data-formatter-x

{"modified":"2026-08-05T12:23:00Z","published":"2026-08-05T12:23:00Z","schema_version":"1.7.4","id":"MAL-2026-12501","summary":"Malicious code in william-data-formatter-x (npm)","details":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (df0b15d8ca8cdfac8baf861a2db501b3b52eb0e41fd44a6690c351bda8c90835)\nThe package declares a preinstall script (node index.js) that, on Windows, spawns a hidden PowerShell window (-WindowStyle Hidden) to fetch https://files.catbox.moe/5khq55.zip, extract it to %TEMP%, and execute Verification_Tool.exe. The fetched binary is unpinned, unhashed, and hosted on an anonymous file-drop service unrelated to the package's stated purpose. The package name has a leading space (' william-data-formatter-x') and carries generic 'Internal sync utility' / 'IT Operations' metadata consistent with social-engineering framing. Installing this package on a Windows machine results in arbitrary attacker-controlled code executing on the installer's host at npm install time.\n","affected":[{"package":{"ecosystem":"npm","name":"william-data-formatter-x"},"versions":["1.0.0"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"index.js","sha256":"d456c8e6d47b64505e530d5648071be4319c4abd35a0fa3ee07772111cab9152","tlsh":"66f0dcb243e99034db709ac3bb9137432853d71a1a13e25219aa41857f14a108bdb8ed"}],"package_integrity":[{"filename":"william-data-formatter-x-1.0.0.tgz","hashes":{"sha1":"226743ce2927e9bea3b7a660f7e6f3ffb64185d3","sha512_sri":"sha512-OXWF11tJsu7iPrwOQuvMFbd7cEEVYpVgRByW9iUgIVGIBbk9Ogij+ob7FgWBSG6Wxngb0IcsgiR5dUHSsv/CeA=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/william-data-formatter-x/v/1.0.0"}],"credits":[{"name":"Amazon Inspector","type":"FINDER","contact":["inspector-research@amazon.com"]}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-014637","import_time":"2026-08-05T13:08:32.612383756Z","modified_time":"2026-08-05T12:23:00Z","sha256":"df0b15d8ca8cdfac8baf861a2db501b3b52eb0e41fd44a6690c351bda8c90835","source":"amazon-inspector","versions":["1.0.0"]}]}}