Function at 0x403899
Capabilities:
Accept command line arguments
Copy file
Create directory
Delete file
Get common file path
Get file system object information
Set current directory
Shutdown system
Terminate process

Disassembly:
sub esp, 0x2d4
push ebx
push ebp
push esi
push edi
push 0x20
xor ebp, ebp
pop esi
mov dword [esp + 0x18], ebp
mov dword [esp + 0x10], str.Error_writing_temporary_file._Make_sure_your_temp_folder_is_valid.
mov dword [esp + 0x14], ebp
call dword [sym.imp.COMCTL32.dll_InitCommonControls]
push 0x8001
call dword [sym.imp.KERNEL32.dll_SetErrorMode]
push ebp
call dword [sym.imp.ole32.dll_OleInitialize]
push 8
mov dword [0x7f16d8], eax
call fcn.00406312
push ebp
push 0x2b4
mov dword [0x7f15f0], eax
lea eax, [esp + 0x38]
push eax
push ebp
push 0x409264
call dword [sym.imp.SHELL32.dll_SHGetFileInfoW]
push str.NSIS_Error
push 0x7e95e0
call fcn.0040601f
call dword [sym.imp.KERNEL32.dll_GetCommandLineW]
push eax
mov edi, 0x8420a0
push edi
call fcn.0040601f
push ebp
call dword [sym.imp.KERNEL32.dll_GetModuleHandleW]
cmp word [0x8420a0], 0x22
mov dword [0x7f15f8], eax
mov eax, edi
jne 0x403939
push 0x22
pop esi
mov eax, 0x8420a2
push esi
push eax
call fcn.00405d1c
push eax
call dword [sym.imp.USER32.dll_CharNextW]
mov esi, eax
mov dword [esp + 0x1c], esi
jmp 0x4039e0
push 0x20
pop ebx
cmp ax, bx
jne 0x403962
add esi, 2
cmp word [esi], bx
je 0x40395a
cmp word [esi], 0x22
jne 0x40396e
push 0x22
add esi, 2
pop ebx
cmp word [esi], 0x2f
jne 0x4039ce
add esi, 2
cmp word [esi], 0x53
jne 0x403990
movzx eax, word [esi + 2]
cmp eax, 0x20
je 0x40398b
cmp ax, bp
jne 0x403990
or dword [esp + 0x14], 2
push 4
push str.NCRC
push esi
call fcn.00403816
add esp, 0xc
test eax, eax
jne 0x4039b7
movzx eax, word [esi + 8]
cmp eax, 0x20
je 0x4039b2
cmp ax, bp
jne 0x4039b7
or dword [esp + 0x14], 4
push 4
lea eax, [esi - 4]
push str.__D
push eax
call fcn.00403816
add esp, 0xc
test eax, eax
je 0x4039ee
push ebx
push esi
call fcn.00405d1c
mov esi, eax
cmp word [esi], 0x22
jne 0x4039e0
add esi, 2
movzx eax, word [esi]
cmp ax, bp
jne 0x403952
jmp 0x403a0b
push 8
lea eax, [esi - 4]
push ebp
push eax
call fcn.00407edb
add esp, 0xc
add esi, 4
push esi
push 0x8460a8
call fcn.0040601f
mov ebx, 0x8560c8
push ebx
push 0x2004
call dword [sym.imp.KERNEL32.dll_GetTempPathW]
call fcn.004037e2
test eax, eax
jne 0x403a49
push 0x1fff
push ebx
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryW]
push str.Temp
push ebx
call sub.KERNEL32.dll_lstrcatW
call fcn.004037e2
test eax, eax
je 0x403ae2
push 0x8520c0
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
push dword [esp + 0x14]
call fcn.0040359d
mov dword [esp + 0x10], eax
cmp eax, ebp
jne 0x403ae2
cmp dword [0x7f1644], ebp
je 0x403acb
push ebp
push edi
call fcn.00405d1c
mov esi, eax
jmp 0x403a8f
push 4
push str.___
push esi
call fcn.00403816
add esp, 0xc
test eax, eax
je 0x403a93
sub esi, 2
cmp esi, edi
jae 0x403a78
mov dword [esp + 0x10], str.Error_launching_installer
cmp esi, edi
jb 0x403b0d
xor eax, eax
mov word [esi], ax
add esi, 8
push esi
call fcn.00406794
test eax, eax
je 0x403ae2
push esi
push 0x8460a8
call fcn.0040601f
push esi
push 0x84a0b0
call fcn.0040601f
mov dword [esp + 0x10], ebp
or dword [0x7f16cc], 0xffffffff
call fcn.00405942
push 1
mov dword [esp + 0x1c], eax
call fcn.004060fd
call fcn.0040386f
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebp
je 0x403be4
push 0x200010
push dword [esp + 0x14]
call fcn.00405cb6
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push 0x409208
push ebx
call sub.KERNEL32.dll_lstrcatW
mov esi, 0x84e0b8
push esi
push ebx
call dword [sym.imp.KERNEL32.dll_lstrcmpiW]
test eax, eax
je 0x403ae2
push ebp
push ebx
call dword [sym.imp.KERNEL32.dll_CreateDirectoryW]
push ebx
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryW]
cmp word [0x8460a8], bp
jne 0x403b4c
push esi
push 0x8460a8
call fcn.0040601f
push dword [esp + 0x1c]
push section..ndata
call fcn.0040601f
push 0x409204
push 0x7f6008
call fcn.0040601f
push 0x1a
pop edi
mov esi, 0x7b1a20
mov eax, dword [0x7f15fc]
push dword [eax + 0x120]
push esi
call fcn.0040681b
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileW]
cmp dword [esp + 0x10], ebp
je 0x403bce
push 1
push esi
push 0x85e0d8
call dword [sym.imp.KERNEL32.dll_CopyFileW]
test eax, eax
je 0x403bce
push ebp
push esi
call fcn.00406c7e
mov eax, dword [0x7f15fc]
push dword [eax + 0x124]
push esi
call fcn.0040681b
push esi
call fcn.00405c55
cmp eax, ebp
je 0x403bce
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebp
inc word [0x7f6008]
dec edi
jne 0x403b71
push ebp
push ebx
call fcn.00406c7e
jmp 0x403ae2
cmp dword [0x7f16b4], ebp
je 0x403c67
push 3
call fcn.00406312
push 4
mov ebx, eax
call fcn.00406312
push 5
mov esi, eax
call fcn.00406312
mov edi, eax
cmp ebx, ebp
je 0x403c53
cmp esi, ebp
je 0x403c53
cmp edi, ebp
je 0x403c53
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebx
test eax, eax
je 0x403c53
lea eax, [esp + 0x24]
push eax
push str.SeShutdownPrivilege
push ebp
call esi
push ebp
push ebp
push ebp
lea eax, [esp + 0x2c]
push eax
push ebp
push dword [esp + 0x30]
mov dword [esp + 0x38], 1
mov dword [esp + 0x44], 2
call edi
push ebp
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x403c67
push 9
call fcn.0040141d
mov eax, dword [0x7f16cc]
cmp eax, 0xffffffff
je 0x403c75
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
jmp 0x403b07