Function at 0x4201d0
Capabilities:
Get file size
Read file on windows
Write file on windows

Disassembly:
sub esp, 0x30
push ebx
push ebp
push esi
push edi
mov edi, dword [esp + 0x44]
xor ebx, ebx
push edi
mov dword [esp + 0x34], ebx
mov dword [esp + 0x30], ebx
mov dword [esp + 0x14], ebx
mov dword [0x426a58], ebx
call fcn.00420000
add esp, 4
test eax, eax
je 0x4208a3
push ebx
push edi
call dword [sym.imp.KERNEL32.dll_GetFileSize]
cmp eax, 0x500000
mov dword [esp + 0x1c], eax
jb 0x420275
cmp eax, 0xc00000
ja 0x420275
push ebx
push ebx
push ebx
push edi
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov eax, dword [esp + 0x1c]
push eax
call fcn.004211bb
mov edx, dword [esp + 0x20]
add esp, 4
lea ecx, [esp + 0x1c]
mov esi, eax
push ebx
push ecx
push edx
push esi
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
mov eax, dword [esp + 0x1c]
push eax
push esi
call fcn.00420180
add esp, 8
test eax, eax
je 0x420260
mov dword [esp + 0x30], 1
push esi
call fcn.004211b0
mov eax, dword [esp + 0x34]
add esp, 4
cmp eax, ebx
jne 0x4208a3
mov eax, dword [0x426968]
cmp eax, 0x527d6994
mov eax, dword [0x426988]
jne 0x420291
cmp eax, 0x22d2
je 0x4208a3
mov edx, dword [0x4269e0]
xor ebp, ebp
mov bp, word [0x426966]
mov dword [0x426a5c], eax
xor eax, eax
cmp ebp, ebx
mov dword [esp + 0x3c], ebp
mov dword [0x426a60], edx
jle 0x4202e4
mov esi, dword [0x426a58]
lea ecx, [esi + 0xc]
mov ebx, dword [ecx + 4]
add ebx, dword [ecx]
cmp ebx, edx
ja 0x4202d1
inc eax
add ecx, 0x28
cmp eax, ebp
jl 0x4202be
jmp 0x4202e4
lea ecx, [eax + eax*4]
lea eax, [esi + ecx*8 + 0x24]
mov ecx, dword [esi + ecx*8 + 0x24]
or ecx, 0x80000000
mov dword [eax], ecx
mov edx, dword [0x426a58]
lea eax, [ebp + ebp*4]
shl eax, 3
mov dword [esp + 0x34], eax
mov ebx, dword [eax + edx - 0x1c]
mov eax, dword [0x426a00]
cmp eax, ebx
jne 0x420374
mov eax, dword [0x426a04]
mov dword [0x426a70], ebx
push eax
push 0x40
mov dword [esp + 0x28], eax
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
test eax, eax
mov dword [esp + 0x2c], eax
je 0x4208a3
mov eax, dword [0x426a58]
dec ebp
push 0
push 0
lea esi, [ebp + ebp*4]
mov dword [esp + 0x44], ebp
shl esi, 3
mov dword [esp + 0x3c], esi
mov ecx, dword [esi + eax + 0x14]
push ecx
push edi
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov eax, dword [esp + 0x20]
mov ecx, dword [esp + 0x2c]
lea edx, [esp + 0x18]
push 0
push edx
push eax
push ecx
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
mov edx, dword [0x426a58]
push 0
push 0
mov eax, dword [esi + edx + 0x14]
push eax
jmp 0x420394
test eax, eax
mov dword [esp + 0x20], 0
jne 0x4208a3
mov ebx, dword [0x4269b0]
push 2
push eax
mov dword [0x426a70], ebx
push eax
push edi
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov eax, dword [0x426a80]
mov edx, dword [0x426a58]
mov esi, dword [0x426a7c]
mov dword [0x426a64], ebp
lea ecx, [eax + eax*4]
mov eax, dword [esp + 0x34]
shl ecx, 3
lea edi, [eax + edx]
mov edx, ecx
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, edx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov eax, dword [0x426a98]
cmp eax, 0x1000
ja 0x4203de
mov eax, 0x1000
push eax
push 0x40
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
test eax, eax
mov dword [esp + 0x14], eax
je 0x420885
mov edx, dword [0x426a94]
mov esi, dword [0x426a7c]
mov ecx, dword [0x426a98]
mov edi, dword [0x426a74]
lea edx, [edx + edx*4]
mov dword [esp + 0x24], eax
mov esi, dword [esi + edx*8 + 0xc]
mov edx, ecx
add esi, edi
mov edi, eax
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, edx
add eax, 8
and ecx, 3
mov dword [esp + 0x38], eax
rep movsb byte es:[edi], byte [esi]
mov ecx, dword [0x426a80]
xor eax, eax
cmp ecx, eax
mov dword [esp + 0x28], eax
jle 0x4208ce
mov esi, dword [esp + 0x34]
xor ebp, ebp
mov dword [esp + 0x34], esi
mov edi, dword [esp + 0x44]
push 1
push 0
push 0
push edi
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov ecx, dword [0x426a58]
mov dword [esi + ecx + 0x14], eax
mov edx, dword [0x426a58]
mov dword [esi + edx + 0xc], ebx
mov eax, dword [0x426a7c]
mov ecx, dword [eax + ebp + 0x10]
mov eax, dword [0x42699c]
lea edx, [ecx + eax - 1]
mov ecx, dword [esp + 0x28]
neg eax
and edx, eax
mov eax, dword [0x426a58]
mov dword [esi + eax + 0x10], edx
mov eax, dword [0x426a94]
cmp ecx, eax
jne 0x420551
mov edx, dword [0x426a98]
mov ecx, dword [esp + 0x20]
mov dword [0x426a00], ebx
push 0
lea eax, [edx + ecx]
mov edx, dword [0x426a58]
mov dword [0x426a04], eax
mov dword [esi + edx + 8], eax
mov eax, dword [0x42699c]
mov edx, dword [0x426a98]
add edx, eax
neg eax
lea edx, [edx + ecx - 1]
and edx, eax
mov eax, dword [0x426a58]
mov dword [esi + eax + 0x10], edx
mov eax, dword [esp + 0x30]
lea edx, [esp + 0x1c]
push edx
push ecx
push eax
push edi
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov edx, dword [0x426a98]
mov eax, dword [esp + 0x14]
lea ecx, [esp + 0x18]
push 0
push ecx
push edx
push eax
push edi
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov edi, dword [esp + 0x14]
mov ecx, 0x400
xor eax, eax
rep stosd dword es:[edi], eax
mov edx, dword [0x426a58]
push eax
lea ecx, [esp + 0x1c]
mov eax, dword [esi + edx + 0x10]
mov edx, dword [0x426a98]
push ecx
mov ecx, dword [esp + 0x28]
sub eax, edx
mov edx, dword [esp + 0x4c]
sub eax, ecx
mov ecx, dword [esp + 0x1c]
push eax
push ecx
push edx
call dword [sym.imp.KERNEL32.dll_WriteFile]
jmp 0x420732
mov eax, dword [0x426a7c]
mov ecx, dword [eax + ebp + 0x10]
push ecx
push 0x40
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
test eax, eax
mov dword [esp + 0x10], eax
je 0x420881
mov eax, dword [0x426a7c]
mov edx, dword [0x426a74]
mov edi, dword [esp + 0x10]
mov esi, dword [eax + ebp + 0xc]
mov ecx, dword [eax + ebp + 0x10]
add esi, edx
mov edx, ecx
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov eax, dword [esp + 0x24]
mov ecx, edx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
mov ecx, dword [0x426a7c]
mov edx, dword [eax]
mov eax, dword [ecx + ebp + 0x10]
mov edi, dword [ecx + ebp + 0xc]
add eax, edi
cmp eax, edx
jbe 0x420687
mov eax, dword [0x426a9c]
mov esi, dword [esp + 0x14]
add eax, esi
mov esi, dword [esp + 0x38]
cmp esi, eax
jae 0x420687
mov eax, dword [ecx + ebp + 0xc]
sub edx, eax
mov eax, dword [esp + 0x24]
mov eax, dword [eax + 4]
sub eax, 8
shr eax, 1
mov edi, eax
dec eax
test edi, edi
je 0x42064e
inc eax
mov dword [esp + 0x38], eax
mov ax, word [esi]
mov edi, eax
and edi, 0xf000
cmp edi, 0x3000
jne 0x420640
mov edi, dword [esp + 0x10]
mov ecx, dword [ecx + ebp + 0xc]
and eax, 0xfff
add eax, edx
add eax, edi
mov edi, dword [0x426a78]
add ecx, dword [edi + 0x34]
mov edi, dword [eax]
sub edi, ecx
mov ecx, dword [esp + 0x10]
mov dword [eax], edi
mov ax, word [esi]
and eax, 0xfff
add eax, edx
add eax, ecx
mov ecx, dword [0x426994]
add ecx, ebx
mov edi, dword [eax]
add edi, ecx
mov dword [eax], edi
mov ecx, dword [0x426a7c]
mov eax, dword [esp + 0x38]
add esi, 2
dec eax
mov dword [esp + 0x38], eax
jne 0x4205e9
mov eax, dword [ecx + ebp + 0xc]
mov edx, ebx
sub edx, eax
mov eax, dword [esp + 0x24]
mov edi, dword [eax]
add edi, edx
mov dword [eax], edi
mov ecx, dword [0x426a7c]
mov eax, esi
add esi, 8
mov edi, dword [ecx + ebp + 0xc]
mov dword [esp + 0x24], eax
mov edx, dword [eax]
mov eax, dword [ecx + ebp + 0x10]
add eax, edi
mov dword [esp + 0x38], esi
cmp eax, edx
ja 0x4205b4
mov edx, dword [esp + 0x28]
mov eax, dword [0x426a8c]
cmp edx, eax
jne 0x4206f8
mov eax, dword [0x426a78]
mov ecx, dword [ecx + ebp + 0xc]
mov esi, dword [esp + 0x10]
mov edx, ebx
mov eax, dword [eax + 0x80]
sub edx, ecx
sub eax, ecx
mov ecx, dword [eax + esi]
add eax, esi
xor edi, edi
cmp ecx, edi
je 0x4206fa
mov esi, dword [eax + 0xc]
mov ecx, dword [eax]
add esi, edx
add ecx, edx
mov dword [eax + 0xc], esi
mov esi, dword [eax + 0x10]
add esi, edx
mov dword [eax], ecx
mov dword [eax + 0x10], esi
mov esi, dword [esp + 0x10]
sub ecx, ebx
mov dword [eax + 8], edi
add ecx, esi
mov dword [eax + 4], edi
mov esi, dword [ecx]
add esi, edx
mov dword [ecx], esi
mov esi, dword [ecx + 4]
add ecx, 4
cmp esi, edi
jne 0x4206de
mov ecx, dword [eax + 0x14]
add eax, 0x14
cmp ecx, edi
jne 0x4206b8
jmp 0x4206fa
xor edi, edi
mov edx, dword [0x426a58]
mov eax, dword [esp + 0x34]
lea ecx, [esp + 0x18]
push edi
push ecx
mov ecx, dword [eax + edx + 0x10]
mov edx, dword [esp + 0x18]
mov eax, dword [esp + 0x4c]
push ecx
push edx
push eax
call dword [sym.imp.KERNEL32.dll_WriteFile]
mov ecx, dword [esp + 0x10]
push ecx
call dword [sym.imp.KERNEL32.dll_GlobalFree]
mov esi, dword [esp + 0x34]
mov dword [esp + 0x10], edi
mov edx, dword [0x426a58]
mov eax, dword [0x426998]
add ebp, 0x28
mov ecx, dword [esi + edx + 8]
add esi, 0x28
mov dword [esp + 0x34], esi
lea ecx, [ecx + eax - 1]
neg eax
and ecx, eax
mov eax, dword [esp + 0x28]
add ebx, ecx
mov ecx, dword [0x426a80]
inc eax
cmp eax, ecx
mov dword [esp + 0x28], eax
jl 0x42044d
mov ebp, dword [esp + 0x3c]
xor eax, eax
mov dword [0x426a30], eax
mov dword [0x426a34], eax
mov dword [0x426a38], eax
mov dword [0x426a3c], eax
mov eax, dword [0x426a84]
mov edi, dword [0x426a90]
add eax, ebp
add ebp, ecx
lea eax, [eax + eax*4]
mov esi, dword [edx + eax*8 + 0xc]
lea eax, [edx + eax*8 + 0xc]
add esi, edi
xor edi, edi
mov dword [0x4269e0], esi
mov esi, dword [0x426a78]
mov esi, dword [esi + 0x84]
mov dword [0x4269b0], ebx
mov dword [0x4269e4], esi
mov eax, dword [eax]
mov esi, dword [0x426a88]
xor ebx, ebx
add eax, esi
xor esi, esi
mov dword [0x426988], eax
xor eax, eax
mov ax, bp
mov word [0x426966], bp
test eax, eax
mov dword [0x42697c], ebx
mov dword [0x426980], edi
mov dword [0x426984], esi
jle 0x42082b
lea ecx, [edx + 0x10]
mov dl, 0x80
test byte [ecx + 0x14], 0x20
je 0x42080a
add ebx, dword [ecx]
mov dword [0x42697c], ebx
test byte [ecx + 0x14], 0x40
je 0x420818
add edi, dword [ecx]
mov dword [0x426980], edi
test byte [ecx + 0x14], dl
je 0x420825
add esi, dword [ecx]
mov dword [0x426984], esi
add ecx, 0x28
dec eax
jne 0x4207fc
mov ecx, dword [0x426a6c]
mov esi, dword [esp + 0x44]
push 0
add ecx, 0xffffff08
push 0
push ecx
push esi
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
mov edi, dword [sym.imp.KERNEL32.dll_WriteFile]
lea edx, [esp + 0x18]
push 0
push edx
push 0xf8
push 0x426960
push esi
call edi
lea eax, [esp + 0x18]
push 0
push eax
xor eax, eax
mov ax, word [0x426966]
mov edx, dword [0x426a58]
lea ecx, [eax + eax*4]
shl ecx, 3
push ecx
push edx
push esi
call edi
mov eax, dword [esp + 0x14]
mov ecx, dword [esp + 0x2c]
test ecx, ecx
je 0x420898
push ecx
call dword [sym.imp.KERNEL32.dll_GlobalFree]
mov eax, dword [esp + 0x14]
test eax, eax
je 0x4208a3
push eax
call dword [sym.imp.KERNEL32.dll_GlobalFree]
mov eax, dword [0x426a58]
pop edi
pop esi
pop ebp
test eax, eax
pop ebx
je 0x4208b7
push eax
call dword [sym.imp.KERNEL32.dll_GlobalFree]
mov eax, dword [esp]
test eax, eax
je 0x4208c6
push eax
call dword [sym.imp.KERNEL32.dll_GlobalFree]
mov eax, dword [esp + 0x20]
add esp, 0x30
ret
mov edx, dword [0x426a58]
jmp 0x420772