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exohaxor
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Posts: 101
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 Posted: Sun Jul 28, 2019 4:04 pm Post subject: dumping hex from executable |
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| Code: |
local f = assert(io.open("test.exe", "rb"))
local block = 10
while true do
local bytes = f:read(block)
if not bytes then break end
for b in string.gfind(bytes, ".") do
io.write(string.format("%02X ", string.byte(b)))
end
io.write(string.rep(" ", block - string.len(bytes) + 1))
io.write(string.gsub(bytes, "%c", "."), "\n")
end
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this code works great but its slow i see hex editors that loads 100mb files fast but when i try 500kb file it takes forever is there a faster way to do this?
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Dark Byte
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| Posted: Sun Jul 28, 2019 4:33 pm Post subject: |
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openFileAsProcess(filename) and then use read/write memory functions, or open the hexview window
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exohaxor
Expert Cheater
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Joined: 02 Sep 2018
Posts: 101
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| Posted: Mon Jul 29, 2019 5:10 am Post subject: |
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but i want dump hex into txt file
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FreeER
Grandmaster Cheater Supreme
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| Posted: Mon Jul 29, 2019 8:00 am Post subject: |
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get some form of linux and use objdump?
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Corroder
Grandmaster Cheater Supreme
 Reputation: 75
Joined: 10 Apr 2015
Posts: 1668
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| Posted: Mon Jul 29, 2019 11:38 pm Post subject: |
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| exohaxor wrote: | | but i want dump hex into txt file |
Just make little modification your code.
| Code: | local f = assert(io.open("E:\\test.exe", "rb"))
local output = assert(io.open("E:\\output.txt", "w"))
local block = 16
while true do
local bytes = f:read(block)
if not bytes then break end
for b in string.gfind(bytes, ".") do
output:write(string.format("%02X ", string.byte(b)))
end
output:write(string.rep(" ", block - string.len(bytes) + 1))
output:write(string.gsub(bytes, "%c", "."), "\n")
end
f:close()
output:close() |
output.txt contains:
| Code: | 4D 5A 90 00 03 00 00 00 04 00 00 00 FF FF 00 00 MZ...........
B8 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 .......@.......
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 E8 00 00 00 ...............
0E 1F BA 0E 00 B4 09 CD 21 B8 01 4C CD 21 54 68 .....!.L!Th
69 73 20 70 72 6F 67 72 61 6D 20 63 61 6E 6E 6F is program canno
74 20 62 65 20 72 75 6E 20 69 6E 20 44 4F 53 20 t be run in DOS
6D 6F 64 65 2E 0D 0D 0A 24 00 00 00 00 00 00 00 mode....$.......
97 EF 55 84 D3 8E 3B D7 D3 8E 3B D7 D3 8E 3B D7 Uӎ;ӎ;ӎ;
CD DC BF D7 CC 8E 3B D7 CD DC AE D7 C3 8E 3B D7 ܿ̎;ܮÎ;
CD DC B8 D7 B3 8E 3B D7 F4 48 40 D7 DA 8E 3B D7 ܸ׳;H@ڎ;
D3 8E 3A D7 B0 8E 3B D7 CD DC B1 D7 D1 8E 3B D7 ӎ:װ;ܱю;
CD DC AF D7 D2 8E 3B D7 CD DC AA D7 D2 8E 3B D7 ܯҎ;ܪҎ;
52 69 63 68 D3 8E 3B D7 00 00 00 00 00 00 00 00 Richӎ;........
00 00 00 00 00 00 00 00 50 45 00 00 4C 01 05 00 ........PE..L...
98 A1 CD 51 00 00 00 00 00 00 00 00 E0 00 02 01 Q...........
0B 01 09 00 00 8E 00 00 00 F0 42 00 00 00 00 00 ........B.....
EB 15 00 00 00 10 00 00 00 A0 00 00 00 00 40 00 ............@.
00 10 00 00 00 02 00 00 05 00 00 00 00 00 00 00 ................
05 00 00 00 00 00 00 00 00 C0 43 00 00 04 00 00 |
and so on
EDIT :
The easy way is using HxD Editor
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predprey
Master Cheater
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Posts: 486
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| Posted: Tue Jul 30, 2019 3:54 am Post subject: Re: dumping hex from executable |
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| exohaxor wrote: | | Code: |
local f = assert(io.open("test.exe", "rb"))
local block = 10
while true do
local bytes = f:read(block)
if not bytes then break end
for b in string.gfind(bytes, ".") do
io.write(string.format("%02X ", string.byte(b)))
end
io.write(string.rep(" ", block - string.len(bytes) + 1))
io.write(string.gsub(bytes, "%c", "."), "\n")
end
|
this code works great but its slow i see hex editors that loads 100mb files fast but when i try 500kb file it takes forever is there a faster way to do this? |
I think why HxD load 100mb files fast is because it doesn't load the file in its entirety but on demand as the user scrolls through.
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exohaxor
Expert Cheater
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Joined: 02 Sep 2018
Posts: 101
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| Posted: Tue Jul 30, 2019 5:34 am Post subject: |
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corroder thanks it worked faster
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