Function at 0x45c0f0
Capabilities:
Check if file exists
Copy file
Get file attributes
Read file on windows
Set file attributes
Write file on windows

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x590a9b
mov eax, dword fs:[0]
push eax
mov dword fs:[0], esp
sub esp, 0x2d4
mov eax, dword [ebp + 0x14]
mov dword [ebp - 0x18], ecx
push ebx
push esi
push edi
test eax, eax
je 0x45c11e
mov byte [eax], 0
mov esi, dword [ebp + 8]
push ecx
mov eax, esp
mov dword [eax], esi
call fcn.00470f70
add esp, 4
test al, al
jne 0x45c145
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret 0x18
push ecx
mov eax, esp
push ecx
lea ecx, [ebp - 0x68]
mov dword [eax], 0
mov eax, esp
mov dword [eax], esi
call fcn.004708f0
push 0
push 0
push 3
push 0
push 1
push SysReAllocString
lea ecx, [ebp - 0x68]
mov dword [ebp - 4], 0
call fcn.00472180
mov ebx, dword [sym.imp.KERNEL32.dll_CreateFileW]
push eax
call ebx
mov edi, eax
cmp edi, 0xffffffff
je 0x45c1b5
push 0x34
lea eax, [ebp - 0xe0]
push 0
push eax
call fcn.0056d4f0
add esp, 0xc
lea eax, [ebp - 0xe0]
push eax
push edi
call dword [sym.imp.KERNEL32.dll_GetFileInformationByHandle]
test eax, eax
jne 0x45c1d4
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor bl, bl
lea ecx, [ebp - 0x68]
call fcn.00470bd0
mov ecx, dword [ebp - 0xc]
mov al, bl
pop edi
pop esi
mov dword fs:[0], ecx
pop ebx
mov esp, ebp
pop ebp
ret 0x18
mov eax, dword [ebp - 0xc0]
xor ecx, ecx
or ecx, dword [ebp - 0xbc]
cmp eax, dword [ebp + 0x1c]
jb 0x45c1ee
ja 0x45c1ae
cmp ecx, dword [ebp + 0x18]
ja 0x45c1ae
push dword [ebp + 0xc]
lea eax, [ebp - 0x28]
push str._s.tmp
push eax
call fcn.0046aaa0
add esp, 0xc
cmp byte [ebp - 0x19], 0
mov byte [ebp - 4], 1
jge 0x45c21a
mov ecx, dword [ebp - 0x28]
test ecx, ecx
jne 0x45c21d
mov ecx, 0x593544
jmp 0x45c21d
lea ecx, [ebp - 0x28]
push ecx
mov eax, esp
push ecx
lea ecx, [ebp - 0x4c]
mov dword [eax], 0
call fcn.004708f0
lea ecx, [ebp - 0x4c]
mov byte [ebp - 4], 2
call fcn.00472180
mov esi, eax
xor eax, eax
push eax
push eax
push eax
push edi
mov dword [ebp - 0x14], eax
call dword [sym.imp.KERNEL32.dll_SetFilePointer]
push 0
push 0x80
push 2
push 0
push 0
push 0x40000000
push esi
call ebx
mov ebx, dword [sym.imp.KERNEL32.dll_CloseHandle]
mov esi, eax
cmp esi, 0xffffffff
je 0x45c2ef
push 0
lea eax, [ebp + 0x1c]
mov dword [ebp + 0x1c], 0
push eax
push 0x200
lea eax, [ebp - 0x2e0]
mov dword [ebp - 0x10], 0
push eax
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x45c2ec
lea ecx, [ecx]
mov eax, dword [ebp + 0x1c]
test eax, eax
je 0x45c342
add dword [ebp - 0x14], eax
lea ecx, [ebp - 0x10]
push 0
push ecx
push eax
lea eax, [ebp - 0x2e0]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_WriteFile]
test eax, eax
je 0x45c320
mov eax, dword [ebp + 0x1c]
cmp eax, dword [ebp - 0x10]
jne 0x45c320
push 0
lea eax, [ebp + 0x1c]
push eax
push 0x200
lea eax, [ebp - 0x2e0]
push eax
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x45c2a0
push esi
call ebx
push edi
call ebx
xor bl, bl
lea ecx, [ebp - 0x4c]
call fcn.00470bd0
cmp byte [ebp - 0x19], 0
mov byte [ebp - 4], 0x10
jge 0x45c1b7
call fcn.00480220
push 0
push dword [ebp - 0x28]
mov ecx, eax
mov edx, dword [eax]
call dword [edx + 0x1c]
jmp 0x45c1b7
push str.SteamService:_Failed_to_copy_to_service_DLL_destination_n
lea eax, [ebp - 0xac]
push eax
push 1
push 1
push 3
push 4
push 0
push 0
call fcn.0045e4c0
add esp, 0x20
jmp 0x45c2ec
push esi
call ebx
cmp dword [ebp - 0x14], 0
je 0x45c2ef
push edi
call ebx
lea ecx, [ebp - 0x7c]
call fcn.0045aa20
push str.f17b6178030a3149805d92b9ce0f681b1d37f7085a66e7f60acf31bc892f2f86
lea ecx, [ebp - 0x7c]
mov byte [ebp - 4], 3
call fcn.00447760
xor edi, edi
lea ecx, [ebp - 0xa0]
push edi
push edi
push edi
xor esi, esi
call fcn.0046b940
cmp byte [ebp - 0x19], 0
mov byte [ebp - 4], 4
jge 0x45c391
mov eax, dword [ebp - 0x28]
test eax, eax
jne 0x45c394
mov eax, 0x593544
jmp 0x45c394
lea eax, [ebp - 0x28]
push 0
push 1
lea ecx, [ebp - 0xa0]
push ecx
push eax
call fcn.00472550
add esp, 0x10
test al, al
je 0x45c434
mov dword [ebp + 0x1c], 0
lea ecx, [ebp + 0x1c]
mov byte [ebp - 4], 5
call fcn.0045b080
push 0
lea ecx, [ebp - 0xa0]
push ecx
push str.SteamService
mov ecx, eax
call fcn.0046ee00
test al, al
je 0x45c424
push 0
lea eax, [ebp - 0x7c]
push eax
lea ecx, [ebp + 0x1c]
call fcn.0045b080
push eax
call fcn.00456ab0
add esp, 0xc
test al, al
jne 0x45c404
mov eax, dword [ebp - 0x18]
mov al, byte [eax + 0x24c]
test al, al
je 0x45c424
lea ecx, [ebp + 0x1c]
call fcn.0045b080
push 0
push 0
push ecx
mov ecx, esp
mov dword [ecx], str.version
mov ecx, eax
call fcn.0045ed60
mov esi, eax
mov edi, edx
mov ecx, dword [ebp + 0x1c]
mov byte [ebp - 4], 6
test ecx, ecx
je 0x45c434
call fcn.00470410
lea ecx, [ebp - 0xa0]
mov byte [ebp - 4], 3
call fcn.00446fa0
mov eax, esi
or eax, edi
jne 0x45c48d
cmp byte [ebp - 0x19], al
jge 0x45c472
mov eax, dword [ebp - 0x28]
test eax, eax
jne 0x45c475
mov eax, 0x593544
push eax
call fcn.00482840
add esp, 4
lea ecx, [ebp - 0x7c]
xor bl, bl
call fcn.00446f10
jmp 0x45c2f4
lea eax, [ebp - 0x28]
push eax
call fcn.00482840
add esp, 4
lea ecx, [ebp - 0x7c]
xor bl, bl
call fcn.00446f10
jmp 0x45c2f4
push ecx
mov ecx, dword [ebp + 0xc]
mov eax, esp
xor ebx, ebx
mov dword [ebp - 0x10], ebx
mov dword [eax], ecx
call fcn.00470f70
add esp, 4
test al, al
je 0x45c56c
push ebx
push ebx
push ebx
lea ecx, [ebp - 0xa0]
call fcn.0046b940
push ebx
push 1
lea eax, [ebp - 0xa0]
mov byte [ebp - 4], 7
push eax
push ecx
mov ecx, dword [ebp + 0xc]
mov eax, esp
mov dword [eax], ecx
call fcn.00472550
add esp, 0x10
test al, al
je 0x45c55d
mov dword [ebp + 0x1c], ebx
lea ecx, [ebp + 0x1c]
mov byte [ebp - 4], 8
call fcn.0045b080
push ebx
lea ecx, [ebp - 0xa0]
push ecx
push str.SteamService
mov ecx, eax
call fcn.0046ee00
test al, al
je 0x45c54d
push ebx
lea eax, [ebp - 0x7c]
push eax
lea ecx, [ebp + 0x1c]
call fcn.0045b080
push eax
call fcn.00456ab0
add esp, 0xc
test al, al
jne 0x45c52c
mov eax, dword [ebp - 0x18]
mov al, byte [eax + 0x24c]
test al, al
je 0x45c54d
lea ecx, [ebp + 0x1c]
call fcn.0045b080
push 0
push 0
push ecx
mov ecx, esp
mov dword [ecx], str.version
mov ecx, eax
call fcn.0045ed60
mov ebx, eax
mov dword [ebp - 0x10], edx
mov ecx, dword [ebp + 0x1c]
mov byte [ebp - 4], 9
test ecx, ecx
je 0x45c55d
call fcn.00470410
lea ecx, [ebp - 0xa0]
mov byte [ebp - 4], 3
call fcn.00446fa0
cmp edi, dword [ebp - 0x10]
ja 0x45c5a4
jb 0x45c577
cmp esi, ebx
ja 0x45c5a4
mov eax, dword [ebp - 0x18]
mov al, byte [eax + 0x24c]
test al, al
jne 0x45c5a4
lea ecx, [ebp - 0x4c]
call fcn.00472180
push eax
call fcn.0045e640
add esp, 4
lea ecx, [ebp - 0x7c]
mov bl, 1
call fcn.00446f10
jmp 0x45c2f4
push dword [ebp + 0x10]
lea ecx, [ebp + 8]
mov dword [ebp + 8], 0
call fcn.0046b5e0
mov eax, dword [ebp + 8]
mov byte [ebp - 4], 0xa
test eax, eax
je 0x45c5c6
cmp byte [eax], 0
jne 0x45c5d4
push dword [ebp + 0xc]
lea ecx, [ebp + 8]
call fcn.0046b5e0
mov eax, dword [ebp + 8]
test eax, eax
mov esi, 0x593544
mov ecx, esi
cmovne ecx, eax
push ecx
mov eax, esp
push ecx
lea ecx, [ebp - 0x40]
mov dword [eax], 0
call fcn.004708f0
mov eax, dword [ebp + 8]
test eax, eax
mov byte [ebp - 4], 0xb
cmovne esi, eax
lea eax, [ebp - 0x5c]
push esi
push str._s.old
push eax
call fcn.0046aaa0
add esp, 0xc
cmp byte [ebp - 0x4d], 0
mov byte [ebp - 4], 0xc
jge 0x45c628
mov ecx, dword [ebp - 0x5c]
test ecx, ecx
jne 0x45c62b
mov ecx, 0x593544
jmp 0x45c62b
lea ecx, [ebp - 0x5c]
push ecx
mov eax, esp
push ecx
lea ecx, [ebp - 0x34]
mov dword [eax], 0
call fcn.004708f0
lea ecx, [ebp - 0x34]
mov byte [ebp - 4], 0xd
call fcn.00472180
lea ecx, [ebp - 0x40]
mov esi, eax
call fcn.00472180
push esi
mov edi, eax
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
je 0x45c67a
test al, 3
je 0x45c67a
and eax, 0xfffffffc
push eax
push esi
call dword [sym.imp.KERNEL32.dll_SetFileAttributesW]
cmp eax, 1
sete al
test al, al
je 0x45c684
push 0
push esi
push edi
call dword [sym.imp.KERNEL32.dll_CopyFileW]
lea ecx, [ebp - 0x40]
call fcn.00472180
lea ecx, [ebp - 0x4c]
mov esi, eax
call fcn.00472180
push 1
push esi
push eax
call fcn.0045e690
add esp, 0xc
test al, al
jne 0x45c6c8
lea ecx, [ebp - 0x40]
call fcn.00472180
lea ecx, [ebp - 0x34]
mov esi, eax
call fcn.00472180
push 1
push esi
push eax
call fcn.0045e690
add esp, 0xc
xor bl, bl
jmp 0x45c6e5
lea ecx, [ebp - 0x34]
call fcn.00472180
push eax
call fcn.0045e640
mov eax, dword [ebp + 0x14]
add esp, 4
test eax, eax
je 0x45c6e3
mov byte [eax], 1
mov bl, 1
lea ecx, [ebp - 0x34]
call fcn.00470bd0
lea ecx, [ebp - 0x5c]
call fcn.0045afa0
lea ecx, [ebp - 0x40]
call fcn.00470bd0
mov byte [ebp - 4], 0xf
call fcn.00480220
push 0
push dword [ebp + 8]
mov ecx, dword [eax]
mov edx, dword [ecx + 0x1c]
mov ecx, eax
call edx
lea ecx, [ebp - 0x7c]
call fcn.00446f10
jmp 0x45c2f4