Function at 0x40322b
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 0x403273
push ebx
call fcn.004061fc
cmp eax, ebx
je 0x403273
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.0040618e
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x403278
push ebp
push 9
call fcn.004061fc
push 7
call fcn.004061fc
mov dword [0x446724], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x4467d8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x4294f0
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x442720
call fcn.00405e63
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x46f000
push eax
push ebp
call fcn.00405e63
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x46f000], 0x22
mov dword [0x446720], eax
mov eax, ebp
jne 0x40330c
mov byte [esp + 0x14], 0x22
mov eax, 0x46f001
push dword [esp + 0x14]
push eax
call fcn.00405900
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x4033e6
cmp cl, 0x20
jne 0x403331
inc eax
cmp byte [eax], 0x20
je 0x40332b
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403341
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4033d6
inc eax
cmp byte [eax], 0x53
jne 0x403366
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40335c
cmp cl, bl
jne 0x403366
mov dword [0x4467c0], 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 0x4033a6
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4033a1
cmp cl, bl
jne 0x4033a6
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 0x4033f2
push dword [esp + 0x14]
push eax
call fcn.00405900
cmp byte [eax], 0x22
jne 0x4033e6
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403326
jmp 0x403403
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x471000
call fcn.00405e63
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x479000
push esi
push 0x2000
call edi
call fcn.004031fa
test eax, eax
jne 0x403475
push 0x1ffb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.004031fa
test eax, eax
jne 0x403475
push esi
push 0x1ffc
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.004031fa
test eax, eax
je 0x403523
push 0x477000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402cb6
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403523
cmp dword [0x44673c], ebx
je 0x403513
push ebx
push ebp
call fcn.00405900
mov edi, eax
cmp edi, ebp
jb 0x4034de
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 0x4034de
dec edi
cmp edi, ebp
jae 0x4034d5
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40354f
mov byte [edi], bl
add edi, 4
push edi
call fcn.004059c3
test eax, eax
je 0x403523
push edi
push 0x471000
call fcn.00405e63
push edi
push 0x473000
call fcn.00405e63
mov dword [esp + 0x10], ebx
or dword [0x4467cc], 0xffffffff
call fcn.004037e3
mov dword [esp + 0x18], eax
call fcn.004036f1
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403657
push 0x200010
push dword [esp + 0x10]
call fcn.00405659
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.004055dc
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x403570
push 0x4091b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x475000
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403523
cmp edi, ebx
push esi
je 0x403598
call fcn.00405542
jmp 0x40359d
call fcn.004055bf
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x471000], bl
jne 0x4035b7
push ebp
push 0x471000
call fcn.00405e63
push dword [esp + 0x1c]
push section..ndata
call fcn.00405e63
movsx cx, byte [0x4091a4]
xor eax, eax
push 0x1a
mov ah, byte [0x4091a5]
pop ebp
or eax, ecx
mov edi, 0x4274f0
mov word [0x449000], ax
mov eax, dword [0x446730]
push dword [eax + 0x120]
push edi
call fcn.00405e85
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403642
push 1
push edi
push 0x47d000
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403642
push ebx
push edi
call fcn.00405d1e
mov eax, dword [0x446730]
push dword [eax + 0x124]
push edi
call fcn.00405e85
push edi
call fcn.004055f4
cmp eax, ebx
je 0x403642
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x449000]
dec ebp
jne 0x4035e5
push ebx
push esi
call fcn.00405d1e
jmp 0x403523
cmp dword [0x4467b4], ebx
je 0x4036d9
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 0x4036aa
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.004061fc
cmp eax, ebx
mov esi, 0x80040002
je 0x4036c6
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x4036d2
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4036d9
push 9
call fcn.0040140b
mov eax, dword [0x4467cc]
cmp eax, 0xffffffff
je 0x4036e7
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]