Function at 0x48f3b4
Capabilities:
Get file size
Write file on windows

Disassembly:
push ebp
mov ebp, esp
push ecx
mov ecx, 0x19
push 0
push 0
dec ecx
jne 0x48f3bd
xchg dword [ebp - 4], ecx
push ebx
push esi
push edi
mov ebx, ecx
mov dword [ebp - 4], edx
mov dword [ebp - 0x24], eax
mov esi, dword [ebp + 8]
mov eax, dword [ebp - 4]
call fcn.00409d44
xor eax, eax
push ebp
push 0x48fd6a
push dword fs:[eax]
mov dword fs:[eax], esp
mov byte [ebp - 0x25], 0
cmp dword [ebp - 4], 0
je 0x48fcc8
cmp dword [ebp - 0x24], 0
jne 0x48f621
lea edx, [ebp - 8]
mov eax, esi
mov ecx, dword [eax]
call dword [ecx + 0x1f8]
cmp byte [ebp + 0xc], 0
jne 0x48f603
mov eax, 0xfa
call fcn.0046bf00
test al, al
je 0x48f434
push 0
call sub.user32.dll_MessageBeep
jmp 0x48fcc8
push 0x7fffffff
mov edi, dword [0x718240]
mov edi, dword [edi]
mov ecx, 1
mov edx, dword [ebp - 8]
mov eax, 0x48fd90
call edi
test eax, eax
jle 0x48f47d
lea edx, [ebp - 0x94]
mov eax, dword [ebp - 8]
call fcn.0046a13c
mov edx, dword [ebp - 0x94]
lea eax, [ebp - 8]
call fcn.0040a088
lea edx, [ebp - 0xc]
mov eax, dword [ebp - 8]
call fcn.004181a8
jmp 0x48f48c
lea ecx, [ebp - 0xc]
mov dl, 1
mov eax, 0x10
call fcn.0046c610
lea edx, [ebp - 0x98]
mov eax, dword [ebp - 8]
call fcn.00418168
mov edx, dword [ebp - 0x98]
lea eax, [ebp - 8]
call fcn.0040a088
lea eax, [ebp - 8]
mov edx, 0x48fda0
call fcn.0040add0
lea eax, [ebp - 8]
mov edx, 0x105
call fcn.0040ad50
lea edx, [ebp - 0x10]
mov eax, esi
mov ecx, dword [eax]
call dword [ecx + 0x2ac]
lea eax, [ebp - 0x8d]
mov edx, 0x4c
call fcn.00413eac
mov dword [ebp - 0x8d], 0x4c
mov dword [ebp - 0x89], ebx
mov dword [ebp - 0x75], 1
mov dword [ebp - 0x6d], 0x104
mov dword [ebp - 0x59], 0x8004
call sub.kernel32.dll_GetVersion
test eax, 0x80000000
jne 0x48f568
mov eax, dword [ebp - 8]
call fcn.0040abbc
mov dword [ebp - 0x71], eax
mov eax, dword [ebp - 0xc]
call fcn.0040abbc
mov dword [ebp - 0x61], eax
mov eax, dword [ebp - 0x10]
call fcn.0040abbc
mov dword [ebp - 0x5d], eax
mov eax, 0x48fda4
mov dword [ebp - 0x81], eax
mov eax, 0x48fdc0
mov dword [ebp - 0x51], eax
lea eax, [ebp - 0x8d]
push eax
call sub.comdlg32.dll_GetSaveFileNameW
test eax, eax
je 0x48fcc8
lea eax, [ebp - 8]
mov edx, dword [ebp - 0x71]
call fcn.0040ac24
jmp 0x48f62c
lea eax, [ebp - 0x14]
mov edx, dword [ebp - 8]
mov ecx, 0
call fcn.0040a85c
lea eax, [ebp - 0x18]
mov edx, dword [ebp - 0xc]
mov ecx, 0
call fcn.0040a85c
lea eax, [ebp - 0x1c]
mov edx, dword [ebp - 0x10]
mov ecx, 0
call fcn.0040a85c
mov eax, dword [ebp - 0x14]
call fcn.0040a6b0
mov dword [ebp - 0x71], eax
mov eax, dword [ebp - 0x18]
call fcn.0040a6b0
mov dword [ebp - 0x61], eax
mov eax, dword [ebp - 0x1c]
call fcn.0040a6b0
mov dword [ebp - 0x5d], eax
mov eax, 0x48fdcc
mov dword [ebp - 0x81], eax
mov eax, 0x48fddc
mov dword [ebp - 0x51], eax
lea eax, [ebp - 0x8d]
push eax
call sub.comdlg32.dll_GetSaveFileNameA
test eax, eax
je 0x48fcc8
lea eax, [ebp - 0x9c]
mov edx, dword [ebp - 0x71]
mov ecx, 0
call fcn.0040a3a8
mov edx, dword [ebp - 0x9c]
lea eax, [ebp - 8]
call fcn.0040ac94
jmp 0x48f62c
lea edx, [ebp - 0xa0]
mov eax, dword [ebp - 8]
call fcn.0046a13c
mov edx, dword [ebp - 0xa0]
lea eax, [ebp - 8]
call fcn.0040a088
jmp 0x48f62c
lea eax, [ebp - 8]
mov edx, dword [ebp - 0x24]
call fcn.0040a088
push ebp
mov eax, dword [ebp - 8]
call fcn.0048f088
pop ecx
call sub.kernel32.dll_GetVersion
test eax, 0x80000000
jne 0x48f663
push 0
push 0
push 4
push 0
push 0
push 0xc0000000
mov eax, dword [ebp - 8]
call fcn.0040abbc
push eax
call sub.kernel32.dll_CreateFileW
mov ebx, eax
jmp 0x48f698
push 0
push 0
push 4
push 0
push 0
push 0xc0000000
lea eax, [ebp - 0xa4]
mov edx, dword [ebp - 8]
mov ecx, 0
call fcn.0040a85c
mov eax, dword [ebp - 0xa4]
call fcn.0040a6b0
push eax
call sub.kernel32.dll_CreateFileA
mov ebx, eax
cmp ebx, 0xffffffff
jne 0x48f7c4
push 0x7fffffff
lea edx, [ebp - 0xa8]
mov eax, esi
mov ecx, dword [eax]
call dword [ecx + 0x1f8]
mov edx, dword [ebp - 0xa8]
mov edi, dword [0x718240]
mov edi, dword [edi]
mov ecx, 1
mov eax, 0x48fd90
call edi
test eax, eax
jne 0x48f7c4
push 0x48fdf0
lea edx, [ebp - 0xb4]
xor eax, eax
call fcn.0046a048
mov eax, dword [ebp - 0xb4]
lea edx, [ebp - 0xb0]
call fcn.00418168
mov eax, dword [ebp - 0xb0]
lea edx, [ebp - 0xac]
call fcn.0046a0fc
push dword [ebp - 0xac]
push 0x48fd90
lea edx, [ebp - 0xb8]
mov eax, esi
mov ecx, dword [eax]
call dword [ecx + 0x1f8]
push dword [ebp - 0xb8]
lea eax, [ebp - 8]
mov edx, 4
call fcn.0040aeb0
push 0x48fe1c
push 0x48fe40
push 0x48fe64
lea edx, [ebp - 8]
mov ecx, 0x48fe90
xor eax, eax
call fcn.0046c94c
push ebp
mov eax, dword [ebp - 8]
call fcn.0048f088
pop ecx
call sub.kernel32.dll_GetVersion
test eax, 0x80000000
jne 0x48f78f
push 0
push 0
push 4
push 0
push 0
push 0xc0000000
mov eax, dword [ebp - 8]
call fcn.0040abbc
push eax
call sub.kernel32.dll_CreateFileW
mov ebx, eax
jmp 0x48f7c4
push 0
push 0
push 4
push 0
push 0
push 0xc0000000
lea eax, [ebp - 0xbc]
mov edx, dword [ebp - 8]
mov ecx, 0
call fcn.0040a85c
mov eax, dword [ebp - 0xbc]
call fcn.0040a6b0
push eax
call sub.kernel32.dll_CreateFileA
mov ebx, eax
cmp ebx, 0xffffffff
je 0x48fcc8
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x200]
test al, al
je 0x48fc48
push 0
push ebx
call sub.kernel32.dll_GetFileSize
mov dword [ebp - 0x2c], eax
lea eax, [ebp - 8]
call fcn.00409c60
cmp dword [ebp - 0x2c], 0
jbe 0x48f8a7
lea ecx, [ebp - 8]
mov edx, 0x48feb8
mov eax, dword [ebp - 4]
call fcn.0048ee44
mov eax, dword [ebp - 8]
call fcn.0040a150
cmp eax, 0x1f
jne 0x48f89f
lea ecx, [ebp - 0xc0]
mov edx, 0x48fee0
mov eax, dword [ebp - 4]
call fcn.0048ee44
cmp dword [ebp - 0xc0], 0
je 0x48f852
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x210]
mov byte [ebp - 0x41], al
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x220]
jmp 0x48f869
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x218]
mov byte [ebp - 0x41], al
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x228]
cmp byte [ebp - 0x41], 0
jne 0x48f879
lea eax, [ebp - 8]
call fcn.00409c60
jmp 0x48f8a7
sub al, 1
jb 0x48f881
je 0x48f890
jmp 0x48f8a7
lea eax, [ebp - 8]
mov edx, 9
call fcn.0040ad50
jmp 0x48f8a7
lea eax, [ebp - 8]
mov edx, 0x14
call fcn.0040ad50
jmp 0x48f8a7
lea eax, [ebp - 8]
call fcn.00409c60
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x208]
test eax, eax
jbe 0x48f8c4
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x208]
cmp eax, dword [ebp - 0x2c]
jb 0x48f8c8
xor eax, eax
jmp 0x48f8ca
mov al, 1
mov byte [ebp - 0x41], al
cmp byte [ebp - 0x41], 0
jne 0x48f8dd
cmp dword [ebp - 8], 0
je 0x48fc3a
push 0
push 0
push 0
push 4
push 0
push ebx
call sub.kernel32.dll_CreateFileMappingW
mov dword [ebp - 0x3c], eax
cmp dword [ebp - 0x3c], 0
je 0x48fc3a
push 0
push 0
push 0
push 0xf001f
mov eax, dword [ebp - 0x3c]
push eax
call sub.kernel32.dll_MapViewOfFile
mov dword [ebp - 0x40], eax
cmp dword [ebp - 0x40], 0
je 0x48fc31
cmp dword [ebp - 8], 0
je 0x48fb97
lea edx, [ebp - 0x14]
mov eax, dword [ebp - 8]
call fcn.00417f3c
mov eax, dword [ebp - 0x2c]
mov dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x2c]
push eax
push 0
mov eax, dword [ebp - 0x30]
dec eax
push eax
push 0
mov eax, dword [ebp - 0x14]
call fcn.0040a15c
add eax, 2
push eax
lea eax, [ebp - 0xc4]
mov ecx, dword [ebp - 0x14]
mov edx, 0x48ff0c
call fcn.0040a4e4
mov eax, dword [ebp - 0xc4]
call fcn.0040a6b0
mov edi, dword [0x7180a4]
mov edi, dword [edi]
mov edx, dword [ebp - 0x40]
pop ecx
call edi
mov dword [ebp - 0x30], eax
cmp dword [ebp - 0x30], 0
jl 0x48fb8d
mov eax, dword [ebp - 0x2c]
push eax
push 0
mov eax, dword [ebp - 0x30]
push eax
push 0
mov edi, dword [0x7180a4]
mov edi, dword [edi]
mov eax, 0x48ff10
mov ecx, 0xb
mov edx, dword [ebp - 0x40]
call edi
mov dword [ebp - 0x34], eax
cmp dword [ebp - 0x34], 0
jge 0x48f9da
mov eax, dword [ebp - 0x2c]
push eax
push 0
push 0
push 0
mov edi, dword [0x7180a4]
mov edi, dword [edi]
mov eax, 0x48ff1c
mov ecx, 9
mov edx, dword [ebp - 0x40]
call edi
mov dword [ebp - 0x34], eax
jmp 0x48f9de
add dword [ebp - 0x34], 2
cmp dword [ebp - 0x34], 0
jl 0x48fb8d
mov eax, dword [ebp - 0x2c]
push eax
push 0
mov eax, dword [ebp - 0x30]
push eax
push 0x7fffffff
mov edi, dword [0x7180a4]
mov edi, dword [edi]
mov eax, 0x48ff10
mov ecx, 0xb
mov edx, dword [ebp - 0x40]
call edi
mov dword [ebp - 0x38], eax
cmp dword [ebp - 0x38], 0
jge 0x48fa1f
mov eax, dword [ebp - 0x2c]
mov dword [ebp - 0x38], eax
jmp 0x48fa23
add dword [ebp - 0x38], 2
push 0
mov ecx, dword [ebp - 0x38]
sub ecx, dword [ebp - 0x34]
mov edx, dword [ebp - 0x40]
add edx, dword [ebp - 0x34]
lea eax, [ebp - 0x18]
call fcn.00409e3c
lea edx, [ebp - 0xc]
mov eax, dword [ebp - 0x18]
call fcn.00417d00
mov ecx, 0x48ff34
mov edx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
call fcn.0048f340
test al, al
je 0x48fb8d
mov ecx, 0x48ff58
mov edx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
call fcn.0048f340
test al, al
je 0x48fb8d
mov ecx, 0x48fee0
mov edx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
call fcn.0048f340
test al, al
je 0x48fb8d
mov ecx, 0x48ff84
mov edx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
call fcn.0048f340
test al, al
je 0x48fb8d
lea ecx, [ebp - 0xc8]
mov edx, 0x48ff84
mov eax, dword [ebp - 0xc]
call fcn.0048ee44
cmp dword [ebp - 0xc8], 0
jne 0x48faf0
mov ecx, 0x48ffa0
mov edx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
call fcn.0048f340
test al, al
je 0x48fb8d
mov ecx, 0x48ffcc
mov edx, dword [ebp - 4]
mov eax, dword [ebp - 0xc]
call fcn.0048f340
test al, al
je 0x48fb8d
lea ecx, [ebp - 8]
mov edx, 0x48fffc
mov eax, dword [ebp - 0xc]
call fcn.0048ee44
cmp dword [ebp - 8], 0
je 0x48fb2b
mov eax, dword [ebp - 8]
call fcn.0040a150
push eax
mov eax, dword [ebp - 8]
call fcn.0040abbc
mov edx, eax
mov edi, dword [0x71841c]
mov edi, dword [edi]
xor eax, eax
pop ecx
call edi
mov dword [ebp - 0x30], eax
jmp 0x48fb32
mov dword [ebp - 0x30], 1
lea eax, [ebp - 0xcc]
push eax
mov eax, dword [ebp - 0x30]
inc eax
mov cx, 0x30
mov edx, 1
call fcn.00416b8c
mov eax, dword [ebp - 0xcc]
push eax
lea eax, [ebp - 4]
mov ecx, 0x48feb8
mov edx, 0x48fffc
call fcn.0048f1dc
mov eax, dword [ebp - 0x38]
cmp eax, dword [ebp - 0x2c]
jae 0x48fb82
mov ecx, dword [ebp - 0x2c]
sub ecx, eax
mov edx, dword [ebp - 0x40]
add edx, dword [ebp - 0x34]
mov eax, dword [ebp - 0x40]
add eax, dword [ebp - 0x38]
call fcn.004066ec
mov eax, dword [ebp - 0x38]
sub eax, dword [ebp - 0x34]
sub dword [ebp - 0x2c], eax
jmp 0x48fb97
cmp dword [ebp - 0x30], 0xffffffff
jne 0x48f936
cmp byte [ebp - 0x41], 0
je 0x48fc28
push 0
push 0
push 0
push ebx
call sub.kernel32.dll_SetFilePointer
xor eax, eax
mov dword [ebp - 0x30], eax
mov eax, dword [ebp - 0x2c]
push eax
push 0
mov eax, dword [ebp - 0x30]
inc eax
push eax
push 0x7fffffff
mov edi, dword [0x7180a4]
mov edi, dword [edi]
mov eax, 0x48ff10
mov ecx, 0xb
mov edx, dword [ebp - 0x40]
call edi
mov dword [ebp - 0x30], eax
cmp dword [ebp - 0x30], 0xffffffff
je 0x48fc07
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x208]
mov edi, eax
mov eax, esi
mov edx, dword [eax]
call dword [edx + 0x208]
shr eax, 2
sub edi, eax
mov eax, dword [ebp - 0x2c]
sub eax, dword [ebp - 0x30]
cmp edi, eax
jbe 0x48fbb2
cmp dword [ebp - 0x30], 0xffffffff
je 0x48fc28
add dword [ebp - 0x30], 2
mov eax, dword [ebp - 0x30]
sub dword [ebp - 0x2c], eax
mov edx, dword [ebp - 0x40]
mov eax, dword [ebp - 0x40]
add eax, dword [ebp - 0x30]
mov ecx, dword [ebp - 0x2c]
call fcn.004066ec
mov eax, dword [ebp - 0x40]
push eax
call sub.kernel32.dll_UnmapViewOfFile
mov eax, dword [ebp - 0x3c]
push eax
call sub.kernel32.dll_CloseHandle
push 0
push 0
mov eax, dword [ebp - 0x2c]
push eax
push ebx
call sub.kernel32.dll_SetFilePointer
push dword [ebp - 4]
push 0x490014
push 0x490014
lea eax, [ebp - 4]
mov edx, 3
call fcn.0040aeb0
lea edx, [ebp - 0x14]
mov eax, dword [ebp - 4]
call fcn.00417f3c
push 0
lea eax, [ebp - 0x2c]
push eax
mov eax, dword [ebp - 0x14]
call fcn.0040a15c
push eax
mov eax, dword [ebp - 0x14]
push eax
push ebx
call sub.kernel32.dll_WriteFile
cmp eax, 1
sbb eax, eax
inc eax
mov byte [ebp - 0x25], al
push ebx
call sub.kernel32.dll_SetEndOfFile
push ebx
call sub.kernel32.dll_CloseHandle
cmp dword [ebp - 0x24], 0
sete al
and al, byte [ebp + 0xc]
je 0x48fcc8
lea eax, [ebp - 0x20]
call fcn.0040d710
push eax
push 0x49001c
push esi
mov eax, dword [esi]
call dword [eax]
test eax, eax
jne 0x48fcc8
mov dl, 1
mov eax, dword [ebp - 0x20]
mov ecx, dword [eax]
call dword [ecx + 0x24]
xor eax, eax
pop edx
pop ecx
pop ecx
mov dword fs:[eax], edx
push 0x48fd74
lea eax, [ebp - 0xcc]
mov edx, 2
call fcn.00409cc0
lea eax, [ebp - 0xc4]
call fcn.00409c84
lea eax, [ebp - 0xc0]
call fcn.00409c60
lea eax, [ebp - 0xbc]
call fcn.00409c84
lea eax, [ebp - 0xb8]
mov edx, 5
call fcn.00409cc0
lea eax, [ebp - 0xa4]
call fcn.00409c84
lea eax, [ebp - 0xa0]
call fcn.00409c60
lea eax, [ebp - 0x9c]
call fcn.00409c84
lea eax, [ebp - 0x98]
mov edx, 2
call fcn.00409cc0
lea eax, [ebp - 0x20]
call fcn.0040d710
lea eax, [ebp - 0x1c]
mov edx, 3
call fcn.00409cf0
lea eax, [ebp - 0x10]
mov edx, 4
call fcn.00409cc0
ret