Function at 0x4034cb
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, 0x218
push ebx
push ebp
push esi
push edi
xor ebx, ebx
mov edi, str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
push 0x8001
mov dword [esp + 0x14], ebx
mov ebp, ebx
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
mov esi, dword [sym.imp.KERNEL32.dll_GetVersionExA]
lea eax, [esp + 0x2c]
xorps xmm0, xmm0
mov dword [esp + 0x40], ebx
push eax
movlpd qword [esp + 0xc4], xmm0
mov dword [esp + 0x30], 0x9c
call esi
test eax, eax
jne 0x403555
lea eax, [esp + 0x2c]
mov dword [esp + 0x2c], 0x94
push eax
call esi
mov eax, dword [esp + 0x3c]
cmp eax, 2
jne 0x40355c
cmp byte [esp + 0x40], 0x53
mov byte [esp + 0xc6], 4
jne 0x403549
movsx ax, byte [esp + 0x4d]
sub ax, 0x30
jmp 0x403577
xor ecx, ecx
mov word [esp + 0xc0], cx
jmp 0x403559
mov eax, dword [esp + 0x3c]
cmp eax, 2
jae 0x40357f
mov al, byte [esp + 0x41]
mov byte [esp + 0xc6], bl
cmp al, 0x41
jl 0x403575
cbw
sub ax, 0x40
jmp 0x403577
xor eax, eax
mov word [esp + 0xc0], ax
cmp dword [esp + 0x30], 0xa
jae 0x403591
movzx eax, word [esp + 0x38]
mov dword [esp + 0x38], eax
jmp 0x403595
mov eax, dword [esp + 0x38]
mov dword [0x4244f8], eax
movzx eax, byte [esp + 0x30]
shl ax, 8
movzx ecx, ax
movzx eax, byte [esp + 0x34]
or ecx, eax
movzx eax, byte [esp + 0xc0]
shl ax, 8
shl ecx, 0x10
movzx eax, ax
or ecx, eax
movzx eax, byte [esp + 0xc6]
or ecx, eax
mov eax, 0x600
mov dword [0x4244fc], ecx
sar ecx, 0x10
cmp cx, ax
je 0x4035ef
push ebx
call fcn.0040654f
test eax, eax
je 0x4035ef
push 0xc00
call eax
mov esi, str.UXTHEME
push esi
call fcn.00405eb4
push esi
call dword [sym.imp.KERNEL32.dll_lstrlenA]
inc esi
add esi, eax
cmp byte [esi], bl
jne 0x4035f4
push 0xc
call fcn.0040654f
push 0xa
call fcn.0040654f
push 8
mov dword [0x423bf0], eax
call fcn.0040654f
test eax, eax
je 0x403635
push 0x1e
call eax
test eax, eax
je 0x403635
or byte [0x4244fc], 0x80
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push ebx
push 0x160
mov dword [0x424460], eax
lea eax, [esp + 0xd0]
push eax
push ebx
push 0x40844b
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x423c00
call fcn.00406774
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
mov ebx, 0x42a000
push ebx
call fcn.00406774
cmp byte [0x42a000], 0x22
mov edx, 0x42a001
mov dword [0x423bf4], 0x400000
sete al
lea eax, [eax*2 + 0x20]
push eax
mov eax, ebx
cmove eax, edx
push eax
call fcn.0040624e
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov ecx, eax
mov dword [esp + 0x14], ecx
jmp 0x403733
inc ecx
mov dl, byte [ecx]
cmp dl, 0x20
je 0x4036bd
mov byte [esp + 0x18], 0x20
mov bl, dl
cmp dl, 0x22
jne 0x4036d8
mov bl, byte [ecx + 1]
mov byte [esp + 0x18], dl
lea eax, [ecx + 1]
cmovne eax, ecx
cmp bl, 0x2f
jne 0x40371f
inc eax
cmp byte [eax], 0x53
jne 0x4036ff
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x4036f5
test cl, cl
jne 0x4036ff
mov dword [0x4244e0], 1
cmp dword [eax], 0x4352434e
jne 0x403716
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x403713
test cl, cl
jne 0x403716
or ebp, 4
cmp dword [eax - 2], 0x3d442f20
je 0x40373b
push dword [esp + 0x18]
push eax
call fcn.0040624e
mov ecx, eax
mov dl, byte [ecx]
cmp dl, 0x22
jne 0x403735
inc ecx
mov dl, byte [ecx]
test dl, dl
jne 0x4036c0
jmp 0x40374d
mov byte [eax - 2], 0
add eax, 2
push eax
push 0x42a400
call fcn.00406774
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov ebx, 0x42b400
push ebx
push 0x400
call esi
call fcn.00403a20
test eax, eax
jne 0x4037bf
push 0x3fb
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatA
call fcn.00403a20
test eax, eax
jne 0x4037bf
push ebx
push 0x3fc
call esi
push 0x408460
push ebx
call sub.KERNEL32.dll_lstrcatA
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push ebx
push str.TEMP
call esi
push ebx
push 0x40846c
call esi
call fcn.00403a20
test eax, eax
je 0x403958
mov ebx, dword [sym.imp.KERNEL32.dll_DeleteFileA]
push 0x42b000
call ebx
push ebp
call fcn.004031bf
mov edi, eax
test edi, edi
jne 0x403958
cmp dword [0x424404], eax
je 0x403836
push eax
mov ebp, 0x42a000
push ebp
call fcn.0040624e
mov esi, eax
jmp 0x4037fd
cmp dword [esi], 0x3d3f5f20
je 0x403801
dec esi
cmp esi, ebp
jae 0x4037f4
mov edi, str.Error_launching_installer
cmp esi, ebp
jb 0x403849
mov byte [esi], 0
add esi, 4
push esi
call fcn.0040628b
test eax, eax
je 0x403958
push esi
push 0x42a400
call fcn.00406774
push esi
push 0x42a800
call fcn.00406774
xor edi, edi
or dword [0x4244ec], 0xffffffff
call fcn.0040570c
mov ebx, eax
jmp 0x40395c
call fcn.00406156
push str.nsu
mov ebp, 0x42b400
mov esi, eax
push ebp
call sub.KERNEL32.dll_lstrcatA
test esi, esi
je 0x40386f
push 0x408478
push ebp
call sub.KERNEL32.dll_lstrcatA
push str..tmp
push ebp
call sub.KERNEL32.dll_lstrcatA
push 0x42ac00
push ebp
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403958
push ebp
test esi, esi
je 0x40389a
call fcn.00405b35
jmp 0x40389f
call fcn.00405b15
push ebp
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42a400], 0
jne 0x4038be
push 0x42ac00
push 0x42a400
call fcn.00406774
push dword [esp + 0x14]
push section..ndata
call fcn.00406774
push 0x41
pop eax
push 0x1a
mov word [0x425400], ax
pop esi
mov eax, dword [0x424410]
push dword [eax + 0x120]
push 0x41f5c0
call fcn.00405bb1
push 0x41f5c0
call ebx
test edi, edi
je 0x403946
push 1
push 0x41f5c0
push 0x42bc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403946
push 0
push 0x41f5c0
call fcn.00405f4f
mov eax, dword [0x424410]
push dword [eax + 0x124]
push 0x41f5c0
call fcn.00405bb1
push 0x41f5c0
call fcn.00406324
test eax, eax
je 0x403946
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
xor edi, edi
inc byte [0x425400]
sub esi, 1
jne 0x4038d8
push esi
push ebp
call fcn.00405f4f
mov ebx, dword [esp + 0x10]
call fcn.004034a1
call dword [sym.imp.ole32.dll_OleUninitialize]
test edi, edi
je 0x40397e
push 0x200010
push edi
call fcn.00406702
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
cmp dword [0x4244d4], 0
je 0x403a0c
lea eax, [esp + 0x14]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call dword [sym.imp.ADVAPI32.dll_OpenProcessToken]
test eax, eax
je 0x4039da
lea eax, [esp + 0x20]
push eax
push str.SeShutdownPrivilege
push 0
call dword [sym.imp.ADVAPI32.dll_LookupPrivilegeValueA]
xor ecx, ecx
mov dword [esp + 0x1c], 1
push ecx
push ecx
push ecx
lea eax, [esp + 0x28]
mov dword [esp + 0x34], 2
push eax
push ecx
push dword [esp + 0x28]
call dword [sym.imp.ADVAPI32.dll_AdjustTokenPrivileges]
push 4
call fcn.0040654f
mov esi, 0x80040002
test eax, eax
je 0x4039f8
push esi
push 0x25
xor ecx, ecx
push ecx
push ecx
push ecx
call eax
test eax, eax
je 0x403a05
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403a0c
push 9
call fcn.00401533
cmp dword [0x4244ec], 0xffffffff
cmovne ebx, dword [0x4244ec]
push ebx
jmp 0x403978