Function at 0x403fb9
Capabilities:
Accept command line arguments
Copy file
Delete file
Get common file path
Shutdown system
Terminate process

Disassembly:
sub esp, 0x20
push ebx
push ebp
push esi
xor ebx, ebx
push edi
mov dword [esp + 0x18], ebx
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov byte [esp + 0x14], 0x20
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push str.NSIS_Error
push 0x4237c0
mov dword [0x424070], eax
call sub.KERNEL32.dll_lstrcpyA
mov esi, 0x42b400
push esi
mov edi, 0x400
push edi
call dword [sym.imp.KERNEL32.dll_GetTempPathA]
call fcn.00403f48
test eax, eax
mov ebp, dword [sym.imp.KERNEL32.dll_lstrcatA]
jne 0x404036
push 0x3fb
push esi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push esi
call ebp
call fcn.00403f48
test eax, eax
je 0x40417d
mov esi, 0x42a000
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push edi
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
push eax
push esi
call dword [sym.imp.KERNEL32.dll_lstrcpynA]
push 0
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x42a000], 0x22
mov dword [0x423fc4], eax
jne 0x404071
mov byte [esp + 0x14], 0x22
mov esi, 0x42a001
push dword [esp + 0x14]
push esi
call fcn.004060c3
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov edi, eax
mov dword [esp + 0x1c], edi
jmp 0x4040ed
cmp cl, 0x20
jne 0x404095
inc eax
cmp byte [eax], 0x20
je 0x40408f
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x4040a5
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4040dd
inc eax
cmp byte [eax], 0x53
jne 0x4040be
mov cl, byte [eax + 1]
or cl, 0x20
cmp cl, 0x20
jne 0x4040be
or ebx, 2
cmp dword [eax], 0x4352434e
jne 0x4040d4
mov cl, byte [eax + 4]
or cl, 0x20
cmp cl, 0x20
jne 0x4040d4
or ebx, 4
cmp dword [eax - 2], 0x3d442f20
je 0x4040f5
push dword [esp + 0x14]
push eax
call fcn.004060c3
cmp byte [eax], 0x22
jne 0x4040ed
inc eax
mov cl, byte [eax]
test cl, cl
jne 0x40408a
jmp 0x404107
mov byte [eax - 2], 0
add eax, 2
push eax
push 0x42a400
call sub.KERNEL32.dll_lstrcpyA
push ebx
call fcn.00403c48
xor ebx, ebx
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x40417d
cmp dword [0x424020], ebx
je 0x40416d
push ebx
push edi
call fcn.004060c3
mov esi, eax
jmp 0x404133
cmp dword [esi], 0x3d3f5f20
je 0x404137
dec esi
cmp esi, edi
jae 0x40412a
cmp esi, edi
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x4041a8
mov byte [esi], 0
add esi, 4
push esi
call fcn.00406437
test eax, eax
je 0x40417d
push esi
push 0x42a400
call sub.KERNEL32.dll_lstrcpyA
push esi
push 0x42a800
call sub.KERNEL32.dll_lstrcpyA
mov dword [esp + 0x10], ebx
or dword [0x42406c], 0xffffffff
call fcn.00405d70
mov dword [esp + 0x18], eax
call fcn.00403f7c
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], 0
je 0x40429b
push 0x200010
push dword [esp + 0x14]
call fcn.00406072
push 2
jmp 0x404352
mov dword [esp + 0x14], ebx
mov edi, 0x41f199
mov esi, 0x41f198
mov ebx, 0x41f998
push 0x42b400
push edi
mov byte [0x41f198], 0x22
call sub.KERNEL32.dll_lstrcpyA
push str.ANSISu_.exe
push esi
call ebp
push edi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], 0
je 0x404281
push 0x400
push ebx
push dword [0x423fc4]
call dword [sym.imp.KERNEL32.dll_GetModuleFileNameA]
push 0x409015
lea eax, [eax + 0x41f98d]
push eax
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x40417d
push 0
push edi
push ebx
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x404281
push 0
push edi
call fcn.0040650b
cmp byte [0x42a400], 0
je 0x40423f
push 0x42a400
push ebx
call sub.KERNEL32.dll_lstrcpyA
jmp 0x404245
push ebx
call fcn.00406411
push 0x4074ec
push esi
call ebp
push dword [esp + 0x1c]
push esi
call ebp
push 0x4074e4
push esi
call ebp
push ebx
push esi
call ebp
push esi
call fcn.004063e4
push 0x42b400
push esi
call fcn.00405ffa
test eax, eax
je 0x404281
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
and dword [esp + 0x10], 0
inc byte [str.ANSISu_.exe]
inc dword [esp + 0x14]
cmp dword [esp + 0x14], 0x1a
jl 0x4041bb
jmp 0x40417d
cmp dword [0x424054], 0
je 0x404340
push 0x4074d4
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
mov edi, eax
test edi, edi
je 0x40432b
mov esi, dword [sym.imp.KERNEL32.dll_GetProcAddress]
push str.OpenProcessToken
push edi
call esi
push str.LookupPrivilegeValueA
push edi
mov ebp, eax
call esi
push str.AdjustTokenPrivileges
push edi
mov ebx, eax
call esi
test ebp, ebp
mov edi, eax
je 0x40432b
test ebx, ebx
je 0x40432b
test edi, edi
je 0x40432b
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x40432b
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
xor esi, esi
push esi
call ebx
push esi
push esi
push esi
lea eax, [esp + 0x2c]
push eax
push esi
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push 0
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x404340
push 9
call fcn.00401fcf
mov eax, dword [0x42406c]
cmp eax, 0xffffffff
je 0x40434e
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]