Function at 0x4032bf
Capabilities:
Accept command line arguments
Check os version
Copy file
Delete file
Get common file path
Get file system object information
Set current directory
Set environment variable
Shutdown system
Terminate process

Disassembly:
sub esp, 0x184
push ebx
push esi
push edi
xor ebx, ebx
push 0x8001
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x20], ebx
mov byte [esp + 0x14], 0x20
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
call dword [sym.imp.KERNEL32.dll_GetVersion]
cmp ax, 6
je 0x403307
push ebx
call fcn.00406290
cmp eax, ebx
je 0x403307
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406222
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x40330c
push ebp
push 9
call fcn.00406290
push 7
call fcn.00406290
mov dword [0x423724], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x4237d8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x41ecf0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x422f20
call fcn.00405ef7
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x429000
push eax
push ebp
call fcn.00405ef7
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x429000], 0x22
mov dword [0x423720], eax
mov eax, ebp
jne 0x4033a0
mov byte [esp + 0x14], 0x22
mov eax, 0x429001
push dword [esp + 0x14]
push eax
call fcn.00405994
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x40347a
cmp cl, 0x20
jne 0x4033c5
inc eax
cmp byte [eax], 0x20
je 0x4033bf
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x4033d5
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x40346a
inc eax
cmp byte [eax], 0x53
jne 0x4033fa
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x4033f0
cmp cl, bl
jne 0x4033fa
mov dword [0x4237c0], 1
movsx ecx, byte [0x4091e7]
movsx edx, byte [0x4091e6]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x4091e5]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x40343a
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403435
cmp cl, bl
jne 0x40343a
or dword [esp + 0x20], 4
movsx ecx, byte [0x4091df]
movsx edx, byte [0x4091de]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x4091dd]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x403486
push dword [esp + 0x14]
push eax
call fcn.00405994
cmp byte [eax], 0x22
jne 0x40347a
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x4033ba
jmp 0x403497
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x429400
call fcn.00405ef7
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x42a400
push esi
push 0x400
call edi
call fcn.0040328e
test eax, eax
jne 0x403509
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.0040328e
test eax, eax
jne 0x403509
push esi
push 0x3fc
call edi
push 0x4091d0
push esi
call sub.KERNEL32.dll_lstrcatA
mov edi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push esi
push str.TEMP
call edi
push esi
push 0x4091c4
call edi
call fcn.0040328e
test eax, eax
je 0x4035b7
push 0x42a000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402d4a
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4035b7
cmp dword [0x42373c], ebx
je 0x4035a7
push ebx
push ebp
call fcn.00405994
mov edi, eax
cmp edi, ebp
jb 0x403572
movsx eax, byte [0x4091bf]
movsx ecx, byte [0x4091be]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x4091bd]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x403572
dec edi
cmp edi, ebp
jae 0x403569
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4035e3
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405a57
test eax, eax
je 0x4035b7
push edi
push 0x429400
call fcn.00405ef7
push edi
push 0x429800
call fcn.00405ef7
mov dword [esp + 0x10], ebx
or dword [0x4237cc], 0xffffffff
call fcn.00403877
mov dword [esp + 0x18], eax
call fcn.00403785
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x4036eb
push 0x200010
push dword [esp + 0x10]
call fcn.004056ed
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405670
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x403604
push 0x4091b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x429c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x4035b7
cmp edi, ebx
push esi
je 0x40362c
call fcn.004055d6
jmp 0x403631
call fcn.00405653
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x429400], bl
jne 0x40364b
push ebp
push 0x429400
call fcn.00405ef7
push dword [esp + 0x1c]
push section..ndata
call fcn.00405ef7
movsx cx, byte [0x4091a4]
xor eax, eax
push 0x1a
mov ah, byte [0x4091a5]
pop ebp
or eax, ecx
mov edi, 0x41e8f0
mov word [0x424400], ax
mov eax, dword [0x423730]
push dword [eax + 0x120]
push edi
call fcn.00405f19
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x4036d6
push 1
push edi
push 0x42ac00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x4036d6
push ebx
push edi
call fcn.00405db2
mov eax, dword [0x423730]
push dword [eax + 0x124]
push edi
call fcn.00405f19
push edi
call fcn.00405688
cmp eax, ebx
je 0x4036d6
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x424400]
dec ebp
jne 0x403679
push ebx
push esi
call fcn.00405db2
jmp 0x4035b7
cmp dword [0x4237b4], ebx
je 0x40376d
lea eax, [esp + 0x18]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
push 2
test eax, eax
pop edi
je 0x40373e
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebx
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
push ebx
push ebx
lea eax, [esp + 0x28]
push ebx
push eax
push ebx
push dword [esp + 0x2c]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], edi
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.00406290
cmp eax, ebx
mov esi, 0x80040002
je 0x40375a
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403766
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40376d
push 9
call fcn.0040140b
mov eax, dword [0x4237cc]
cmp eax, 0xffffffff
je 0x40377b
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]