Function at 0x40334a
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]
and eax, 0xbfffffff
cmp ax, 6
mov dword [0x42f42c], eax
je 0x40339c
push ebx
call fcn.0040648e
cmp eax, ebx
je 0x40339c
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406420
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x4033a1
push 0xa
call fcn.0040648e
push 8
call fcn.0040648e
push 6
mov dword [0x42f424], eax
call fcn.0040648e
cmp eax, ebx
je 0x4033e3
push 0x1e
call eax
test eax, eax
je 0x4033e3
or byte [0x42f42f], 0x40
push ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x42f4f8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x429858
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x42ec20
call fcn.004060f6
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x435000
push eax
push ebp
call fcn.004060f6
cmp byte [0x435000], 0x22
mov dword [0x42f420], 0x400000
mov eax, ebp
jne 0x40344d
mov byte [esp + 0x14], 0x22
mov eax, 0x435001
push dword [esp + 0x14]
push eax
call fcn.00405ab9
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403527
cmp cl, 0x20
jne 0x403472
inc eax
cmp byte [eax], 0x20
je 0x40346c
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403482
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403517
inc eax
cmp byte [eax], 0x53
jne 0x4034a7
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40349d
cmp cl, bl
jne 0x4034a7
mov dword [0x42f4e0], 1
movsx ecx, byte [0x40a1e7]
movsx edx, byte [0x40a1e6]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1e5]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4034e7
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4034e2
cmp cl, bl
jne 0x4034e7
or dword [esp + 0x20], 4
movsx ecx, byte [0x40a1df]
movsx edx, byte [0x40a1de]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a1dd]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x403533
push dword [esp + 0x14]
push eax
call fcn.00405ab9
cmp byte [eax], 0x22
jne 0x403527
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403467
jmp 0x403544
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x435400
call fcn.004060f6
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x436400
push esi
push 0x400
call edi
call fcn.00403319
test eax, eax
jne 0x4035b6
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403319
test eax, eax
jne 0x4035b6
push esi
push 0x3fc
call edi
push 0x40a1d0
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 0x40a1c4
call edi
call fcn.00403319
test eax, eax
je 0x403664
push 0x436000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402db3
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403664
cmp dword [0x42f440], ebx
je 0x403654
push ebx
push ebp
call fcn.00405ab9
mov edi, eax
cmp edi, ebp
jb 0x40361f
movsx eax, byte [0x40a1bf]
movsx ecx, byte [0x40a1be]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a1bd]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x40361f
dec edi
cmp edi, ebp
jae 0x403616
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403690
mov byte [edi], bl
add edi, 4
push edi
call fcn.00405b7c
test eax, eax
je 0x403664
push edi
push 0x435400
call fcn.004060f6
push edi
push 0x435800
call fcn.004060f6
mov dword [esp + 0x10], ebx
or dword [0x42f4ec], 0xffffffff
call fcn.00403924
mov dword [esp + 0x18], eax
call fcn.00403832
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403798
push 0x200010
push dword [esp + 0x10]
call fcn.00405812
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.0040577d
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x4036b1
push 0x40a1b0
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x435c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403664
cmp edi, ebx
push esi
je 0x4036d9
call fcn.004056e3
jmp 0x4036de
call fcn.00405760
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x435400], bl
jne 0x4036f8
push ebp
push 0x435400
call fcn.004060f6
push dword [esp + 0x1c]
push section..ndata
call fcn.004060f6
movsx cx, byte [0x40a1a4]
xor eax, eax
push 0x1a
mov ah, byte [0x40a1a5]
pop ebp
or eax, ecx
mov edi, 0x429458
mov word [0x430400], ax
mov eax, dword [0x42f434]
push dword [eax + 0x120]
push edi
call fcn.00406118
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403783
push 1
push edi
push 0x436c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403783
push ebx
push edi
call fcn.00405ed5
mov eax, dword [0x42f434]
push dword [eax + 0x124]
push edi
call fcn.00406118
push edi
call fcn.00405795
cmp eax, ebx
je 0x403783
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x430400]
dec ebp
jne 0x403726
push ebx
push esi
call fcn.00405ed5
jmp 0x403664
cmp dword [0x42f4d4], ebx
je 0x40381a
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 0x4037eb
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.0040648e
cmp eax, ebx
mov esi, 0x80040002
je 0x403807
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403813
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40381a
push 9
call fcn.0040140b
mov eax, dword [0x42f4ec]
cmp eax, 0xffffffff
je 0x403828
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]