Function at 0x543d11
Capabilities:
Create a process with modified i/o handles and window
Create pipe
Create process on windows

Disassembly:
sub esp, 0xc0
push ebx
push ebp
push esi
push edi
push 0x20
pop ebp
xor ebx, ebx
lea eax, [esp + 0x34]
push 0xc
pop esi
push esi
push ebx
push eax
mov dword [esp + 0x1c], ebx
mov edi, ebx
mov dword [esp + 0x2c], ebx
mov dword [esp + 0x34], ebx
mov dword [esp + 0x20], ebx
mov dword [esp + 0x28], ebx
mov dword [esp + 0x24], ebx
mov dword [esp + 0x30], ebx
call sub.MSVCRT.dll_memset
push 0x44
xor eax, eax
mov dword [esp + 0x44], esi
pop esi
inc eax
mov dword [esp + 0x44], ebx
push esi
mov dword [esp + 0x4c], eax
lea eax, [esp + 0x60]
push ebx
push eax
call sub.MSVCRT.dll_memset
mov ebx, dword [esp + 0xf8]
xor ecx, ecx
inc ecx
mov dword [esp + 0x68], esi
add esp, 0x18
mov dword [esp + 0x7c], ecx
test bl, 2
je 0x543d94
xor eax, eax
push 0x30
mov word [esp + 0x84], ax
pop ebp
jmp 0x543d9c
mov word [esp + 0x80], cx
mov esi, dword [sym.imp.KERNEL32.dll_CreatePipe]
test bl, 0x40
je 0x543dce
mov eax, dword [esp + 0xe4]
test eax, eax
je 0x543dce
mov eax, dword [eax + 0xc]
test eax, eax
je 0x543dce
mov dword [esp + 0x7c], 0x101
mov dword [esp + 0x88], eax
mov dword [esp + 0x24], ecx
jmp 0x543e16
test bl, 4
je 0x543e19
test bl, 0x10
je 0x543e19
xor eax, eax
push eax
lea eax, [esp + 0x38]
push eax
lea eax, [esp + 0x28]
push eax
lea eax, [esp + 0x1c]
push eax
call esi
test eax, eax
je 0x543e19
mov eax, dword [esp + 0x10]
or dword [esp + 0x7c], 0x100
mov dword [esp + 0x88], eax
lea eax, [esp + 0x20]
push eax
call fcn.00543ca1
pop ecx
mov dword [esp + 0x24], 1
and ebp, 0xffffffef
mov eax, ebx
and eax, 4
mov dword [esp + 0x30], eax
je 0x543eb4
test bl, 8
je 0x543e6e
xor eax, eax
push eax
lea eax, [esp + 0x38]
push eax
lea eax, [esp + 0x1c]
push eax
lea eax, [esp + 0x34]
push eax
call esi
test eax, eax
je 0x543e6e
mov eax, dword [esp + 0x14]
or dword [esp + 0x7c], 0x100
mov dword [esp + 0x8c], eax
lea eax, [esp + 0x28]
push eax
call fcn.00543ca1
pop ecx
and ebp, 0xffffffef
mov dword [esp + 0x24], 1
test bl, 0x20
je 0x543eb4
xor eax, eax
push eax
lea eax, [esp + 0x38]
push eax
lea eax, [esp + 0x20]
push eax
lea eax, [esp + 0x28]
push eax
call esi
test eax, eax
je 0x543eb4
mov eax, dword [esp + 0x18]
or dword [esp + 0x7c], 0x100
mov dword [esp + 0x90], eax
lea eax, [esp + 0x1c]
push eax
call fcn.00543ca1
pop ecx
and ebp, 0xffffffef
mov dword [esp + 0x24], 1
test dword [esp + 0x7c], 0x100
je 0x543f00
mov esi, dword [sym.imp.KERNEL32.dll_GetStdHandle]
cmp dword [esp + 0x88], edi
jne 0x543ed8
push 0xfffffffffffffff6
call esi
mov dword [esp + 0x88], eax
cmp dword [esp + 0x8c], edi
jne 0x543eec
push 0xfffffffffffffff5
call esi
mov dword [esp + 0x8c], eax
cmp dword [esp + 0x90], edi
jne 0x543f00
push 0xfffffffffffffff4
call esi
mov dword [esp + 0x90], eax
mov ebx, dword [esp + 0xd4]
mov eax, 0x5f8008
test ebx, ebx
jne 0x543f12
mov ebx, eax
cmp dword [esp + 0xd8], edi
jne 0x543f22
mov dword [esp + 0xd8], eax
push ebx
call sub.MSVCRT.dll_wcslen
push dword [esp + 0xdc]
mov esi, eax
call sub.MSVCRT.dll_wcslen
add esi, eax
pop ecx
pop ecx
lea eax, [esi*2 + 8]
push eax
xor eax, eax
push eax
push dword [0x6720e4]
call dword [sym.imp.KERNEL32.dll_HeapAlloc]
cmp word [ebx], 0x22
mov esi, eax
mov dword [esp + 0x2c], esi
je 0x543f7f
push 0x5f814c
push esi
call sub.MSVCRT.dll_wcscpy
push ebx
push esi
call sub.MSVCRT.dll_wcscat
push 0x5f814c
push esi
call sub.MSVCRT.dll_wcscat
add esp, 0x18
jmp 0x543f88
push ebx
push esi
call sub.MSVCRT.dll_wcscpy
pop ecx
pop ecx
mov eax, dword [esp + 0xd8]
xor edx, edx
cmp word [eax], dx
je 0x543fb3
push 0x5f8134
push esi
call sub.MSVCRT.dll_wcscat
push dword [esp + 0xe0]
push esi
call sub.MSVCRT.dll_wcscat
add esp, 0x10
xor edx, edx
mov ecx, dword [esp + 0xdc]
test ecx, ecx
je 0x543fce
movzx eax, word [ecx]
neg eax
sbb eax, eax
and ecx, eax
mov dword [esp + 0xdc], ecx
lea eax, [esp + 0x40]
push eax
lea eax, [esp + 0x54]
push eax
push ecx
push edx
push ebp
push dword [esp + 0x38]
push edx
push edx
push esi
push edx
call dword [sym.imp.KERNEL32.dll_CreateProcessW]
test eax, eax
je 0x544097
mov esi, dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp dword [esp + 0x14], edi
je 0x544003
push dword [esp + 0x14]
call esi
cmp dword [esp + 0x10], edi
je 0x54400f
push dword [esp + 0x10]
call esi
cmp dword [esp + 0x18], edi
je 0x54401b
push dword [esp + 0x18]
call esi
push dword [esp + 0x44]
call esi
mov ebx, dword [esp + 0xe0]
test bl, 1
je 0x544039
push 0xffffffffffffffff
push dword [esp + 0x44]
call dword [sym.imp.KERNEL32.dll_WaitForSingleObject]
cmp dword [esp + 0x30], edi
je 0x54408c
mov esi, 0x673e60
push esi
call dword [sym.imp.KERNEL32.dll_EnterCriticalSection]
push 0x20
push 0x6724e0
call fcn.00559d2c
pop ecx
pop ecx
push esi
mov edi, eax
call dword [sym.imp.KERNEL32.dll_LeaveCriticalSection]
mov eax, dword [esp + 0x40]
mov dword [edi], eax
mov eax, dword [esp + 0x48]
mov dword [edi + 4], eax
mov eax, dword [esp + 0x28]
mov dword [edi + 0xc], eax
mov eax, dword [esp + 0x20]
mov dword [edi + 8], eax
mov eax, dword [esp + 0x1c]
mov dword [edi + 0x10], eax
mov dword [edi + 0x14], ebx
jmp 0x544223
push dword [esp + 0x40]
call esi
jmp 0x544220
mov ebp, dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp dword [esp + 0x14], edi
je 0x5440a9
push dword [esp + 0x14]
call ebp
cmp dword [esp + 0x28], edi
je 0x5440b5
push dword [esp + 0x28]
call ebp
cmp dword [esp + 0x20], edi
je 0x5440c1
push dword [esp + 0x20]
call ebp
cmp dword [esp + 0x10], edi
je 0x5440cd
push dword [esp + 0x10]
call ebp
cmp dword [esp + 0x18], edi
je 0x5440d9
push dword [esp + 0x18]
call ebp
cmp dword [esp + 0x1c], edi
je 0x5440e5
push dword [esp + 0x1c]
call ebp
test byte [esp + 0xe0], 0x78
jne 0x544223
cmp dword [esp + 0xdc], edi
jne 0x544140
push ebx
call sub.MSVCRT.dll_wcslen
pop ecx
lea esi, [eax - 1]
lea esi, [ebx + esi*2]
cmp esi, ebx
jbe 0x544140
cmp word [esi], 0x5c
je 0x54411a
sub esi, 2
cmp esi, ebx
ja 0x54410d
cmp esi, ebx
jbe 0x544140
push ebx
push dword [esp + 0x30]
call sub.MSVCRT.dll_wcscpy
mov eax, dword [esp + 0x34]
sub esi, ebx
pop ecx
sar esi, 1
pop ecx
xor ecx, ecx
mov dword [esp + 0xdc], eax
mov word [eax + esi*2 + 2], cx
push 0x3c
pop esi
xor eax, eax
push esi
push eax
lea eax, [esp + 0x9c]
push eax
call sub.MSVCRT.dll_memset
movzx eax, word [esp + 0x8c]
add esp, 0xc
mov dword [esp + 0xb0], eax
xor eax, eax
mov dword [esp + 0xa0], eax
mov eax, dword [esp + 0xdc]
mov dword [esp + 0xac], eax
mov eax, dword [esp + 0xd8]
mov dword [esp + 0xa8], eax
lea eax, [esp + 0x94]
push eax
mov dword [esp + 0x98], esi
mov dword [esp + 0x9c], 0x540
mov dword [esp + 0xa8], ebx
call dword [sym.imp.SHELL32.dll_ShellExecuteExW]
test eax, eax
je 0x544223
mov ebx, dword [esp + 0xe0]
test bl, 1
je 0x5441d1
push 0xffffffffffffffff
push dword [esp + 0xd0]
call dword [sym.imp.KERNEL32.dll_WaitForSingleObject]
cmp dword [esp + 0x30], edi
je 0x544217
mov esi, 0x673e60
push esi
call dword [sym.imp.KERNEL32.dll_EnterCriticalSection]
push 0x20
push 0x6724e0
call fcn.00559d2c
pop ecx
pop ecx
push esi
mov edi, eax
call dword [sym.imp.KERNEL32.dll_LeaveCriticalSection]
mov eax, dword [esp + 0xcc]
or dword [edi + 4], 0xffffffff
mov dword [edi], eax
xor eax, eax
mov dword [edi + 0xc], eax
mov dword [edi + 8], eax
mov dword [edi + 0x10], eax
mov dword [edi + 0x14], ebx
jmp 0x544225
push dword [esp + 0xcc]
call ebp
xor edi, edi
inc edi
xor eax, eax
push dword [esp + 0x2c]
push eax
push dword [0x6720e4]
call dword [sym.imp.KERNEL32.dll_HeapFree]
mov eax, edi
pop edi
pop esi
pop ebp
pop ebx
add esp, 0xc0
ret 0x14