Brute force excel file with file level encryption

brute_force_excel.py

import pandas as pd
import win32com.client
import string, sys

xlApp = win32com.client.Dispatch("Excel.Application")
print("Excel library version:", xlApp.Version)

path = "Statement.xlsx"
tokens = [str(x) for x in list(range(0,4))]
# tokens.extend([x for x in string.ascii_lowercase])
# tokens.extend([x for x in string.ascii_uppercase])
print(tokens)

tt = [x + x.upper() for x in string.ascii_lowercase]
tt.extend([x.upper() + x for x in string.ascii_lowercase])
num = ["{0:03d}".format(x) for x in range(0, 1000)]
print(tt)
print(num)


def crack():
    for a in tt:
        for b in num:
                pwd = a + b
                print("Trying ", pwd)
                try:
                    xlWb = xlApp.Workbooks.Open(path, False, True, None, pwd)
                    
                    # make sure it was opened. This throws error if it wasnt
                    # Sheets -> 1-indexed
                    print(xlWb.Sheets(1).Name)
                    print("Password is", pwd)
                    return
                except:
                    pass
crack()