Function at 0x4030ec
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 0x403134
push ebx
call fcn.004060a5
cmp eax, ebx
je 0x403134
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00406037
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
lea esi, [esi + eax + 1]
cmp byte [esi], bl
jne 0x403139
push ebp
push 9
call fcn.004060a5
push 7
call fcn.004060a5
mov dword [0x7a1f44], eax
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
mov dword [0x7a1ff8], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x79d500
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x7a1740
call fcn.00405d0c
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x7a8000
push eax
push ebp
call fcn.00405d0c
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x7a8000], 0x22
mov dword [0x7a1f40], eax
mov eax, ebp
jne 0x4031cd
mov byte [esp + 0x14], 0x22
mov eax, 0x7a8001
push dword [esp + 0x14]
push eax
call fcn.004057a9
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x4032a7
cmp cl, 0x20
jne 0x4031f2
inc eax
cmp byte [eax], 0x20
je 0x4031ec
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x403202
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403297
inc eax
cmp byte [eax], 0x53
jne 0x403227
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x40321d
cmp cl, bl
jne 0x403227
mov dword [0x7a1fe0], 1
movsx ecx, byte [0x409183]
movsx edx, byte [0x409182]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409181]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x403267
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403262
cmp cl, bl
jne 0x403267
or dword [esp + 0x20], 4
movsx ecx, byte [0x40917b]
movsx edx, byte [0x40917a]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x409179]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x4032b3
push dword [esp + 0x14]
push eax
call fcn.004057a9
cmp byte [eax], 0x22
jne 0x4032a7
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x4031e7
jmp 0x4032c4
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x7a8400
call fcn.00405d0c
mov edi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov esi, 0x7a9400
push esi
push 0x400
call edi
call fcn.004030bb
test eax, eax
jne 0x403336
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call sub.KERNEL32.dll_lstrcatA
call fcn.004030bb
test eax, eax
jne 0x403336
push esi
push 0x3fc
call edi
push 0x40916c
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 0x409160
call edi
call fcn.004030bb
test eax, eax
je 0x4033e4
push 0x7a9000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.00402c66
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x4033e4
cmp dword [0x7a1f5c], ebx
je 0x4033d4
push ebx
push ebp
call fcn.004057a9
mov edi, eax
cmp edi, ebp
jb 0x40339f
movsx eax, byte [0x40915b]
movsx ecx, byte [0x40915a]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x409159]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [edi], eax
je 0x40339f
dec edi
cmp edi, ebp
jae 0x403396
cmp edi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403410
mov byte [edi], bl
add edi, 4
push edi
call fcn.0040586c
test eax, eax
je 0x4033e4
push edi
push 0x7a8400
call fcn.00405d0c
push edi
push 0x7a8800
call fcn.00405d0c
mov dword [esp + 0x10], ebx
or dword [0x7a1fec], 0xffffffff
call fcn.0040368c
mov dword [esp + 0x18], eax
call fcn.004035b2
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
pop ebp
je 0x403518
push 0x200010
push dword [esp + 0x10]
call fcn.00405502
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
call fcn.00405485
push str.nsu
push esi
mov edi, eax
call sub.KERNEL32.dll_lstrcatA
cmp edi, ebx
je 0x403431
push 0x40914c
push esi
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push esi
call sub.KERNEL32.dll_lstrcatA
mov ebp, 0x7a8c00
push ebp
push esi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x4033e4
cmp edi, ebx
push esi
je 0x403459
call fcn.004053eb
jmp 0x40345e
call fcn.00405468
push esi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x7a8400], bl
jne 0x403478
push ebp
push 0x7a8400
call fcn.00405d0c
push dword [esp + 0x1c]
push section..ndata
call fcn.00405d0c
movsx cx, byte [0x409140]
xor eax, eax
push 0x1a
mov ah, byte [0x409141]
pop ebp
or eax, ecx
mov edi, 0x79d100
mov word [0x7a3400], ax
mov eax, dword [0x7a1f50]
push dword [eax + 0x120]
push edi
call fcn.00405d2e
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403503
push 1
push edi
push 0x7a9c00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403503
push ebx
push edi
call fcn.00405bc7
mov eax, dword [0x7a1f50]
push dword [eax + 0x124]
push edi
call fcn.00405d2e
push edi
call fcn.0040549d
cmp eax, ebx
je 0x403503
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x7a3400]
dec ebp
jne 0x4034a6
push ebx
push esi
call fcn.00405bc7
jmp 0x4033e4
cmp dword [0x7a1fd4], ebx
je 0x40359a
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 0x40356b
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.004060a5
cmp eax, ebx
mov esi, 0x80040002
je 0x403587
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403593
push esi
push edi
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x40359a
push 9
call fcn.0040140b
mov eax, dword [0x7a1fec]
cmp eax, 0xffffffff
je 0x4035a8
mov dword [esp + 0x14], eax
push dword [esp + 0x14]
call dword [sym.imp.KERNEL32.dll_ExitProcess]