Function at 0x421130
Capabilities:
Check if file exists
Get common file path
Get file size
Read file on windows

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x534723
mov eax, dword fs:[0]
push eax
sub esp, 0x250
mov eax, dword [0x5917ec]
xor eax, ebp
mov dword [ebp - 0x10], eax
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov eax, dword [ebp + 0xc]
mov edi, dword [ebp + 8]
mov dword [ebp - 0x258], eax
mov eax, dword [ebp + 0x10]
mov dword [ebp - 0x25c], edi
mov dword [ebp - 0x250], eax
mov eax, dword [ebp + 0x14]
mov dword [ebp - 0x254], 0
mov dword [edi + 0x10], 0
mov dword [edi + 0x14], 0
cmp dword [eax + 0x14], 0x10
mov ecx, dword [eax + 0x10]
mov dword [ebp - 4], 0
mov dword [ebp - 0x238], edi
mov dword [ebp - 0x244], eax
mov dword [ebp - 0x23c], ecx
jb 0x4211bd
mov eax, dword [eax]
mov dword [ebp - 0x244], eax
cmp ecx, 0x10
jae 0x4211d4
movups xmm0, xmmword [eax]
movups xmmword [edi], xmm0
mov dword [edi + 0x10], ecx
mov dword [edi + 0x14], 0xf
jmp 0x421215
mov esi, ecx
mov eax, SysReAllocString
or esi, 0xf
mov ecx, edi
cmp esi, eax
cmova esi, eax
lea eax, [esi + 1]
push eax
call fcn.00424180
mov ecx, eax
mov eax, dword [ebp - 0x23c]
inc eax
mov dword [edi], ecx
push eax
push dword [ebp - 0x244]
push ecx
call fcn.004c1b00
mov eax, dword [ebp - 0x23c]
add esp, 0xc
mov dword [edi + 0x10], eax
mov dword [edi + 0x14], esi
push 0x208
lea eax, [ebp - 0x218]
mov dword [ebp - 0x254], 1
push 0
push eax
call fcn.004c0d00
add esp, 0xc
lea eax, [ebp - 0x218]
push 0
push 0x1a
push eax
push 0
call dword [sym.imp.SHELL32.dll_SHGetSpecialFolderPathW]
mov eax, dword [0x594fe4]
test al, 1
jne 0x421263
or eax, 1
mov dword [0x594fe0], 0
mov dword [0x594fe4], eax
mov byte [ebp - 0x231], 0
lea eax, [ebp - 0x240]
mov dword [ebp - 4], 1
push eax
call fcn.00475ea5
lea eax, [ebp - 0x240]
mov dword [ebp - 4], 2
mov dword [ebp - 0x24c], eax
lea eax, [ebp - 0x231]
mov dword [ebp - 0x248], eax
lea eax, [ebp - 0x24c]
push eax
push 0x41dc30
push 0x594fe0
call fcn.00476e7d
add esp, 0x10
test eax, eax
je 0x42158e
lea eax, [ebp - 0x240]
mov dword [ebp - 4], 3
push eax
call fcn.00475edf
add esp, 4
mov byte [ebp - 4], 0
lea eax, [ebp - 0x218]
push 0x594fe8
push eax
call dword [sym.imp.SHLWAPI.dll_PathAppendW]
mov esi, dword [sym.imp.SHLWAPI.dll_PathFileExistsW]
lea eax, [ebp - 0x218]
push eax
call esi
test eax, eax
je 0x42156b
mov dword [ebp - 0x220], 0
mov dword [ebp - 0x21c], 0xf
mov byte [ebp - 0x230], 0
lea eax, [ebp - 0x218]
mov dword [ebp - 4], 6
push eax
call esi
test eax, eax
je 0x421560
xor edi, edi
mov dword [ebp - 0x240], edi
mov dword [ebp - 0x23c], edi
push edi
push 0x80
push 3
push edi
push 1
push SysReAllocString
lea eax, [ebp - 0x218]
mov byte [ebp - 4], 7
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileW]
cmp eax, 0xffffffff
jne 0x421376
call fcn.0041fd70
test eax, eax
js 0x421560
jmp 0x42137e
mov edi, eax
mov dword [ebp - 0x240], edi
lea eax, [ebp - 0x248]
push eax
push edi
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov esi, eax
mov dword [ebp - 0x24c], esi
cmp esi, 0xffffffff
jne 0x4213ac
call fcn.0041fd70
test eax, eax
js 0x421555
mov esi, dword [ebp - 0x24c]
mov eax, dword [ebp - 0x248]
test eax, eax
jb 0x421555
ja 0x421555
test esi, esi
je 0x421555
test eax, eax
ja 0x421555
jb 0x4213de
cmp esi, 0x500000
jae 0x421555
mov ecx, dword [ebp - 0x220]
cmp esi, ecx
ja 0x421408
cmp dword [ebp - 0x21c], 0x10
lea eax, [ebp - 0x230]
mov dword [ebp - 0x220], esi
cmovae eax, dword [ebp - 0x230]
mov byte [eax + esi], 0
jmp 0x42141a
mov eax, esi
sub eax, ecx
lea ecx, [ebp - 0x230]
push 0
push eax
call fcn.004242c0
cmp dword [ebp - 0x21c], 0x10
lea ecx, [ebp - 0x23c]
push 0
push ecx
lea eax, [ebp - 0x230]
mov dword [ebp - 0x23c], 0
cmovae eax, dword [ebp - 0x230]
push esi
push eax
push edi
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
jne 0x421457
call fcn.0041fd70
mov esi, eax
jmp 0x42146f
xor eax, eax
mov ecx, 0x80070026
cmp dword [ebp - 0x23c], esi
cmovne eax, ecx
mov dword [ebp - 0x244], eax
mov esi, eax
mov byte [ebp - 4], 6
test edi, edi
je 0x42147e
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
test esi, esi
js 0x421560
cmp dword [ebp - 0x220], 0
je 0x421560
cmp dword [ebp - 0x21c], 0x10
lea eax, [ebp - 0x230]
cmovae eax, dword [ebp - 0x230]
push eax
call fcn.00446290
mov edi, eax
add esp, 4
test edi, edi
je 0x421517
mov eax, dword [ebp - 0x258]
cmp dword [eax + 0x14], 0x10
jb 0x4214c4
mov eax, dword [eax]
push eax
push edi
call fcn.00446180
add esp, 8
test eax, eax
jne 0x4214e0
push edi
call fcn.00445fa0
add esp, 4
jmp 0x421560
mov ecx, dword [ebp - 0x250]
cmp dword [ecx + 0x14], 0x10
jb 0x4214ee
mov ecx, dword [ecx]
push ecx
push eax
call fcn.00446180
add esp, 8
test eax, eax
je 0x4214d2
push dword [eax + 0x10]
mov esi, dword [ebp - 0x238]
mov ecx, esi
call fcn.004245a0
push edi
call fcn.00445fa0
add esp, 4
jmp 0x42151d
mov esi, dword [ebp - 0x238]
mov edx, dword [ebp - 0x21c]
cmp edx, 0x10
jb 0x421571
mov ecx, dword [ebp - 0x230]
inc edx
mov eax, ecx
cmp edx, 0x1000
jb 0x421549
mov ecx, dword [ecx - 4]
add edx, 0x23
sub eax, ecx
add eax, 0xfffffffc
cmp eax, 0x1f
ja 0x4215ae
push edx
push ecx
call fcn.0049b8c9
add esp, 8
jmp 0x421571
test edi, edi
je 0x421560
push edi
call dword [sym.imp.KERNEL32.dll_CloseHandle]
lea ecx, [ebp - 0x230]
call fcn.0040bd70
mov esi, dword [ebp - 0x238]
mov eax, esi
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
mov ecx, dword [ebp - 0x10]
xor ecx, ebp
call fcn.0049b8b8
mov esp, ebp
pop ebp
ret
lea eax, [ebp - 0x240]
mov byte [ebp - 4], 4
push eax
call fcn.00475f21
add esp, 4
mov byte [ebp - 4], 2
test al, al
jne 0x4215b3
call fcn.00476f4e
call fcn.004dbf83
sub esp, 8
lea eax, [ebp - 0x240]
mov ecx, esp
push eax
call fcn.0040bca0
call fcn.0040e0a0
int3