Function at 0x45c0a0
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 0x5911f1
mov eax, dword fs:[0]
push eax
mov dword fs:[0], esp
sub esp, 0x2cc
mov eax, dword [ebp + 0x14]
mov dword [ebp - 0x18], ecx
push ebx
push esi
push edi
test eax, eax
je 0x45c0ce
mov byte [eax], 0
mov esi, dword [ebp + 8]
push ecx
mov eax, esp
mov dword [eax], esi
call fcn.004708a0
add esp, 4
test al, al
jne 0x45c0f5
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 - 0x90]
mov dword [eax], 0
mov eax, esp
mov dword [eax], esi
call fcn.00470340
push 0
push 0
push 3
push 0
push 1
push SysReAllocString
lea ecx, [ebp - 0x90]
mov dword [ebp - 4], 0
call fcn.004718a0
mov ebx, dword [sym.imp.KERNEL32.dll_CreateFileW]
push eax
call ebx
mov edi, eax
cmp edi, 0xffffffff
je 0x45c16b
push 0x34
lea eax, [ebp - 0xd8]
push 0
push eax
call fcn.0056cd70
add esp, 0xc
lea eax, [ebp - 0xd8]
push eax
push edi
call dword [sym.imp.KERNEL32.dll_GetFileInformationByHandle]
test eax, eax
jne 0x45c18d
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor bl, bl
lea ecx, [ebp - 0x90]
call fcn.00470590
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 - 0xb8]
xor ecx, ecx
or ecx, dword [ebp - 0xb4]
cmp eax, dword [ebp + 0x1c]
jb 0x45c1a7
ja 0x45c164
cmp ecx, dword [ebp + 0x18]
ja 0x45c164
push dword [ebp + 0xc]
lea eax, [ebp - 0x28]
push str._s.tmp
push eax
call fcn.0046a950
add esp, 0xc
cmp byte [ebp - 0x19], 0
mov byte [ebp - 4], 1
jge 0x45c1d3
mov ecx, dword [ebp - 0x28]
test ecx, ecx
jne 0x45c1d6
mov ecx, 0x593544
jmp 0x45c1d6
lea ecx, [ebp - 0x28]
push ecx
mov eax, esp
push ecx
lea ecx, [ebp - 0x4c]
mov dword [eax], 0
call fcn.00470340
lea ecx, [ebp - 0x4c]
mov byte [ebp - 4], 2
call fcn.004718a0
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 0x45c2a1
push 0
lea eax, [ebp + 0x1c]
mov dword [ebp + 0x1c], 0
push eax
push 0x200
lea eax, [ebp - 0x2d8]
mov dword [ebp - 0x10], 0
push eax
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x45c29e
mov eax, dword [ebp + 0x1c]
test eax, eax
je 0x45c2fc
add dword [ebp - 0x14], eax
lea ecx, [ebp - 0x10]
push 0
push ecx
push eax
lea eax, [ebp - 0x2d8]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_WriteFile]
test eax, eax
je 0x45c2d2
mov eax, dword [ebp + 0x1c]
cmp eax, dword [ebp - 0x10]
jne 0x45c2d2
push 0
lea eax, [ebp + 0x1c]
push eax
push 0x200
lea eax, [ebp - 0x2d8]
push eax
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x45c252
push esi
call ebx
push edi
call ebx
xor bl, bl
lea ecx, [ebp - 0x4c]
call fcn.00470590
cmp byte [ebp - 0x19], 0
mov byte [ebp - 4], 0x10
jge 0x45c16d
call fcn.0047fa50
push 0
push dword [ebp - 0x28]
mov ecx, eax
mov edx, dword [eax]
call dword [edx + 0x1c]
jmp 0x45c16d
push str.SteamService:_Failed_to_copy_to_service_DLL_destination_n
lea eax, [ebp - 0x64]
push eax
lea eax, [ebp - 0x7c]
push eax
lea eax, [ebp - 0x84]
push eax
push 1
push 1
push 3
push 4
push 0
push 0
call fcn.0045e590
add esp, 0x28
jmp 0x45c29e
push esi
call ebx
cmp dword [ebp - 0x14], 0
je 0x45c2a1
push edi
call ebx
lea ecx, [ebp - 0xa4]
call fcn.0045a990
push str.f17b6178030a3149805d92b9ce0f681b1d37f7085a66e7f60acf31bc892f2f86
lea ecx, [ebp - 0xa4]
mov byte [ebp - 4], 3
call fcn.00447770
xor edi, edi
lea ecx, [ebp - 0x84]
push edi
push edi
push edi
xor esi, esi
call fcn.0046b5c0
cmp byte [ebp - 0x19], 0
mov byte [ebp - 4], 4
jge 0x45c351
mov eax, dword [ebp - 0x28]
test eax, eax
jne 0x45c354
mov eax, 0x593544
jmp 0x45c354
lea eax, [ebp - 0x28]
push 0
push 1
lea ecx, [ebp - 0x84]
push ecx
push eax
call fcn.00471c70
add esp, 0x10
test al, al
je 0x45c3f7
mov dword [ebp + 0x1c], 0
lea ecx, [ebp + 0x1c]
mov byte [ebp - 4], 5
call fcn.0045af90
push 0
lea ecx, [ebp - 0x84]
push ecx
push str.SteamService
mov ecx, eax
call fcn.0046e860
test al, al
je 0x45c3e7
push 0
lea eax, [ebp - 0xa4]
push eax
lea ecx, [ebp + 0x1c]
call fcn.0045af90
push eax
call fcn.00456ac0
add esp, 0xc
test al, al
jne 0x45c3c7
mov eax, dword [ebp - 0x18]
mov al, byte [eax + 0x250]
test al, al
je 0x45c3e7
lea ecx, [ebp + 0x1c]
call fcn.0045af90
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 0x45c3f7
call fcn.0046fe60
lea ecx, [ebp - 0x84]
mov byte [ebp - 4], 3
call fcn.0046a5f0
mov eax, esi
or eax, edi
jne 0x45c456
cmp byte [ebp - 0x19], al
jge 0x45c438
mov eax, dword [ebp - 0x28]
test eax, eax
jne 0x45c43b
mov eax, 0x593544
push eax
call fcn.00482020
add esp, 4
lea ecx, [ebp - 0xa4]
xor bl, bl
call fcn.00446f60
jmp 0x45c2a6
lea eax, [ebp - 0x28]
push eax
call fcn.00482020
add esp, 4
lea ecx, [ebp - 0xa4]
xor bl, bl
call fcn.00446f60
jmp 0x45c2a6
push ecx
mov ecx, dword [ebp + 0xc]
mov eax, esp
xor ebx, ebx
mov dword [ebp - 0x10], ebx
mov dword [eax], ecx
call fcn.004708a0
add esp, 4
test al, al
je 0x45c538
push ebx
push ebx
push ebx
lea ecx, [ebp - 0x84]
call fcn.0046b5c0
push ebx
push 1
lea eax, [ebp - 0x84]
mov byte [ebp - 4], 7
push eax
push ecx
mov ecx, dword [ebp + 0xc]
mov eax, esp
mov dword [eax], ecx
call fcn.00471c70
add esp, 0x10
test al, al
je 0x45c529
mov dword [ebp + 0x1c], ebx
lea ecx, [ebp + 0x1c]
mov byte [ebp - 4], 8
call fcn.0045af90
push ebx
lea ecx, [ebp - 0x84]
push ecx
push str.SteamService
mov ecx, eax
call fcn.0046e860
test al, al
je 0x45c519
push ebx
lea eax, [ebp - 0xa4]
push eax
lea ecx, [ebp + 0x1c]
call fcn.0045af90
push eax
call fcn.00456ac0
add esp, 0xc
test al, al
jne 0x45c4f8
mov eax, dword [ebp - 0x18]
mov al, byte [eax + 0x250]
test al, al
je 0x45c519
lea ecx, [ebp + 0x1c]
call fcn.0045af90
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 0x45c529
call fcn.0046fe60
lea ecx, [ebp - 0x84]
mov byte [ebp - 4], 3
call fcn.0046a5f0
cmp edi, dword [ebp - 0x10]
ja 0x45c573
jb 0x45c543
cmp esi, ebx
ja 0x45c573
mov eax, dword [ebp - 0x18]
mov al, byte [eax + 0x250]
test al, al
jne 0x45c573
lea ecx, [ebp - 0x4c]
call fcn.004718a0
push eax
call fcn.0045e710
add esp, 4
lea ecx, [ebp - 0xa4]
mov bl, 1
call fcn.00446f60
jmp 0x45c2a6
push dword [ebp + 0x10]
lea ecx, [ebp + 8]
mov dword [ebp + 8], 0
call fcn.0046b270
mov eax, dword [ebp + 8]
mov byte [ebp - 4], 0xa
test eax, eax
je 0x45c595
cmp byte [eax], 0
jne 0x45c5a3
push dword [ebp + 0xc]
lea ecx, [ebp + 8]
call fcn.0046b270
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.00470340
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.0046a950
add esp, 0xc
cmp byte [ebp - 0x4d], 0
mov byte [ebp - 4], 0xc
jge 0x45c5f7
mov ecx, dword [ebp - 0x5c]
test ecx, ecx
jne 0x45c5fa
mov ecx, 0x593544
jmp 0x45c5fa
lea ecx, [ebp - 0x5c]
push ecx
mov eax, esp
push ecx
lea ecx, [ebp - 0x34]
mov dword [eax], 0
call fcn.00470340
lea ecx, [ebp - 0x34]
mov byte [ebp - 4], 0xd
call fcn.004718a0
lea ecx, [ebp - 0x40]
mov esi, eax
call fcn.004718a0
push esi
mov edi, eax
call dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
cmp eax, 0xffffffff
je 0x45c649
test al, 3
je 0x45c649
and eax, 0xfffffffc
push eax
push esi
call dword [sym.imp.KERNEL32.dll_SetFileAttributesW]
cmp eax, 1
sete al
test al, al
je 0x45c653
push 0
push esi
push edi
call dword [sym.imp.KERNEL32.dll_CopyFileW]
lea ecx, [ebp - 0x40]
call fcn.004718a0
lea ecx, [ebp - 0x4c]
mov esi, eax
call fcn.004718a0
push 1
push esi
push eax
call fcn.0045e760
add esp, 0xc
test al, al
jne 0x45c697
lea ecx, [ebp - 0x40]
call fcn.004718a0
lea ecx, [ebp - 0x34]
mov esi, eax
call fcn.004718a0
push 1
push esi
push eax
call fcn.0045e760
add esp, 0xc
xor bl, bl
jmp 0x45c6b4
lea ecx, [ebp - 0x34]
call fcn.004718a0
push eax
call fcn.0045e710
mov eax, dword [ebp + 0x14]
add esp, 4
test eax, eax
je 0x45c6b2
mov byte [eax], 1
mov bl, 1
lea ecx, [ebp - 0x34]
call fcn.00470590
lea ecx, [ebp - 0x5c]
call fcn.0045aeb0
lea ecx, [ebp - 0x40]
call fcn.00470590
mov byte [ebp - 4], 0xf
call fcn.0047fa50
push 0
push dword [ebp + 8]
mov ecx, dword [eax]
mov edx, dword [ecx + 0x1c]
mov ecx, eax
call edx
lea ecx, [ebp - 0xa4]
call fcn.00446f60
jmp 0x45c2a6