Function at 0x403693
Capabilities:
Accept command line arguments
Copy file
Create directory
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 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 dword [esp + 0x20], ebx
mov byte [esp + 0x14], 0x20
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebx
call dword [sym.imp.ole32.dll_OleInitialize]
push 9
mov dword [0x425c38], eax
call fcn.00406775
mov dword [0x425b84], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x420538
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x425380
call fcn.0040629d
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x42b000
push eax
push ebp
call fcn.0040629d
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x42b000], 0x22
mov dword [0x425b80], eax
mov eax, ebp
jne 0x403736
mov byte [esp + 0x14], 0x22
mov eax, 0x42b001
push dword [esp + 0x14]
push eax
call fcn.00405d58
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x403810
cmp cl, 0x20
jne 0x40375b
inc eax
cmp byte [eax], 0x20
je 0x403755
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x40376b
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x403800
inc eax
cmp byte [eax], 0x53
jne 0x403790
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x403786
cmp cl, bl
jne 0x403790
mov dword [0x425c20], 1
movsx ecx, byte [0x40a85f]
movsx edx, byte [0x40a85e]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a85d]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x4037d0
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x4037cb
cmp cl, bl
jne 0x4037d0
or dword [esp + 0x20], 4
movsx ecx, byte [0x40a857]
movsx edx, byte [0x40a856]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a855]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x40381c
push dword [esp + 0x14]
push eax
call fcn.00405d58
cmp byte [eax], 0x22
jne 0x403810
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403750
jmp 0x40382d
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x42b400
call fcn.0040629d
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov edi, 0x42c400
push edi
push 0x400
call esi
call fcn.0040365f
test eax, eax
jne 0x40389f
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.0040365f
test eax, eax
jne 0x40389f
push edi
push 0x3fc
call esi
push 0x40a848
push edi
call sub.KERNEL32.dll_lstrcatA
mov esi, dword [sym.imp.KERNEL32.dll_SetEnvironmentVariableA]
push edi
push str.TEMP
call esi
push edi
push 0x40a83c
call esi
call fcn.0040365f
test eax, eax
je 0x403954
push 0x42c000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.004030f5
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403954
cmp dword [0x425b9c], ebx
je 0x40393d
push ebx
push ebp
call fcn.00405d58
mov esi, eax
cmp esi, ebp
jb 0x403908
movsx eax, byte [0x40a837]
movsx ecx, byte [0x40a836]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a835]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [esi], eax
je 0x403908
dec esi
cmp esi, ebp
jae 0x4038ff
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x40397f
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405e1b
test eax, eax
je 0x403954
push esi
push 0x42b400
call fcn.0040629d
push esi
push 0x42b800
call fcn.0040629d
mov dword [esp + 0x10], ebx
or dword [0x425c2c], 0xffffffff
call fcn.00403c2b
push 1
mov dword [esp + 0x1c], eax
call fcn.004065a1
call fcn.00403b18
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x403a5d
push 0x200010
push dword [esp + 0x14]
call fcn.00405a5c
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov esi, 0x42bc00
push esi
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403954
push ebx
push edi
call dword [sym.imp.KERNEL32.dll_CreateDirectoryA]
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42b400], bl
jne 0x4039bd
push esi
push 0x42b400
call fcn.0040629d
push dword [esp + 0x1c]
push section..ndata
call fcn.0040629d
movsx cx, byte [0x40a824]
xor eax, eax
push 0x1a
mov ah, byte [0x40a825]
pop ebp
or eax, ecx
mov esi, 0x420138
mov word [0x426400], ax
mov eax, dword [0x425b90]
push dword [eax + 0x120]
push esi
call fcn.004062bf
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x403a48
push 1
push esi
push 0x42cc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x403a48
push ebx
push esi
call fcn.00406151
mov eax, dword [0x425b90]
push dword [eax + 0x124]
push esi
call fcn.004062bf
push esi
call fcn.004059fb
cmp eax, ebx
je 0x403a48
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x426400]
dec ebp
jne 0x4039eb
push ebx
push edi
call fcn.00406151
jmp 0x403954
cmp dword [0x425c14], ebx
je 0x403b00
push 4
call fcn.00406775
push 5
mov ebp, eax
call fcn.00406775
push 6
mov esi, eax
call fcn.00406775
cmp ebp, ebx
mov edi, eax
je 0x403ad0
cmp esi, ebx
je 0x403ad0
cmp edi, ebx
je 0x403ad0
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x403ad0
lea eax, [esp + 0x28]
push eax
push str.SeShutdownPrivilege
push ebx
call esi
push ebx
push ebx
lea eax, [esp + 0x2c]
push ebx
push eax
push ebx
push dword [esp + 0x30]
mov dword [esp + 0x3c], 1
mov dword [esp + 0x48], 2
call edi
push 7
call fcn.00406775
cmp eax, ebx
mov esi, 0x80040002
je 0x403aec
push esi
push 0x25
push ebx
push ebx
push ebx
call eax
test eax, eax
je 0x403af9
push esi
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403b00
push 9
call fcn.0040140b
mov eax, dword [0x425c2c]
cmp eax, 0xffffffff
je 0x403b0e
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]