Microsoft® Windows® User State Migration Tool
application/octet-stream
Magic Bytes
Offset: 0
50 4D 4F 43 43 4D 4F 43
Microsoft Windows User State Migration Tool (USMT) data files are proprietary containers developed by Microsoft Corporation for managing enterprise-scale system transitions. These files are primarily used by administrators to migrate user profiles, operating system configurations, and application settings during Windows upgrades or hardware refreshes. Although the format is inherently secure, migration stores frequently contain sensitive user information, requiring administrators to implement encryption and access controls to prevent unauthorized data exposure during transit.
Validation Code
How to validate .dat files in Python
Python
def is_dat(file_path: str) -> bool:
"""Check if file is a valid DAT by magic bytes."""
signature = bytes([0x50, 0x4D, 0x4F, 0x43, 0x43, 0x4D, 0x4F, 0x43])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .dat files in Node.js
Node.js
function isDAT(buffer: Buffer): boolean {
const signature = Buffer.from([0x50, 0x4D, 0x4F, 0x43, 0x43, 0x4D, 0x4F, 0x43]);
return buffer.subarray(0, 8).equals(signature);
}
Go
func IsDAT(data []byte) bool {
signature := []byte{0x50, 0x4D, 0x4F, 0x43, 0x43, 0x4D, 0x4F, 0x43}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
GET
/api/v1/dat
curl https://filesignature.org/api/v1/dat