Windows Event Viewer file
application/octet-stream
Magic Bytes
Offset: 0
4C 66 4C 65
The Windows Event Viewer file (EVT) is a proprietary binary log format developed by Microsoft for recording system activity within early Windows operating systems. It serves as a centralized repository for application logs, security audits, and system events used by system administrators for troubleshooting and diagnostic purposes. Superseded by the newer XML-based EVTX format in Windows Vista, this legacy standard remains relevant primarily for digital forensics and legacy system maintenance.
Validation Code
How to validate .evt files in Python
Python
def is_evt(file_path: str) -> bool:
"""Check if file is a valid EVT by magic bytes."""
signature = bytes([0x4C, 0x66, 0x4C, 0x65])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .evt files in Node.js
Node.js
function isEVT(buffer: Buffer): boolean {
const signature = Buffer.from([0x4C, 0x66, 0x4C, 0x65]);
return buffer.subarray(0, 4).equals(signature);
}
Go
func IsEVT(data []byte) bool {
signature := []byte{0x4C, 0x66, 0x4C, 0x65}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
GET
/api/v1/evt
curl https://filesignature.org/api/v1/evt