Function at 0x403555
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 8
mov dword [0x4263f8], eax
call fcn.004065ea
mov dword [0x426344], eax
push ebx
lea eax, [esp + 0x38]
push 0x160
push eax
push ebx
push 0x420cf8
call dword [sym.imp.SHELL32.dll_SHGetFileInfoA]
push str.NSIS_Error
push 0x425b40
call fcn.00406112
call dword [sym.imp.KERNEL32.dll_GetCommandLineA]
mov ebp, 0x42c000
push eax
push ebp
call fcn.00406112
push ebx
call dword [sym.imp.KERNEL32.dll_GetModuleHandleA]
cmp byte [0x42c000], 0x22
mov dword [0x426340], eax
mov eax, ebp
jne 0x4035f8
mov byte [esp + 0x14], 0x22
mov eax, 0x42c001
push dword [esp + 0x14]
push eax
call fcn.00405bea
push eax
call dword [sym.imp.USER32.dll_CharNextA]
mov dword [esp + 0x1c], eax
jmp 0x4036d2
cmp cl, 0x20
jne 0x40361d
inc eax
cmp byte [eax], 0x20
je 0x403617
cmp byte [eax], 0x22
mov byte [esp + 0x14], 0x20
jne 0x40362d
inc eax
mov byte [esp + 0x14], 0x22
cmp byte [eax], 0x2f
jne 0x4036c2
inc eax
cmp byte [eax], 0x53
jne 0x403652
mov cl, byte [eax + 1]
cmp cl, 0x20
je 0x403648
cmp cl, bl
jne 0x403652
mov dword [0x4263e0], 1
movsx ecx, byte [0x40a7fb]
movsx edx, byte [0x40a7fa]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a7f9]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.NCRC]
shl ecx, 8
or ecx, edx
cmp dword [eax], ecx
jne 0x403692
mov cl, byte [eax + 4]
cmp cl, 0x20
je 0x40368d
cmp cl, bl
jne 0x403692
or dword [esp + 0x20], 4
movsx ecx, byte [0x40a7f3]
movsx edx, byte [0x40a7f2]
shl ecx, 8
or ecx, edx
movsx edx, byte [0x40a7f1]
shl ecx, 8
or ecx, edx
movsx edx, byte [str.__D]
shl ecx, 8
or ecx, edx
cmp dword [eax - 2], ecx
je 0x4036de
push dword [esp + 0x14]
push eax
call fcn.00405bea
cmp byte [eax], 0x22
jne 0x4036d2
inc eax
mov cl, byte [eax]
cmp cl, bl
jne 0x403612
jmp 0x4036ef
mov byte [eax - 2], bl
add eax, 2
push eax
push 0x42c400
call fcn.00406112
mov esi, dword [sym.imp.KERNEL32.dll_GetTempPathA]
mov edi, 0x42d400
push edi
push 0x400
call esi
call fcn.00403521
test eax, eax
jne 0x403761
push 0x3fb
push edi
call dword [sym.imp.KERNEL32.dll_GetWindowsDirectoryA]
push str.Temp
push edi
call sub.KERNEL32.dll_lstrcatA
call fcn.00403521
test eax, eax
jne 0x403761
push edi
push 0x3fc
call esi
push 0x40a7e4
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 0x40a7d8
call esi
call fcn.00403521
test eax, eax
je 0x403816
push 0x42d000
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
push dword [esp + 0x20]
call fcn.004030ac
cmp eax, ebx
mov dword [esp + 0x10], eax
jne 0x403816
cmp dword [0x42635c], ebx
je 0x4037ff
push ebx
push ebp
call fcn.00405bea
mov esi, eax
cmp esi, ebp
jb 0x4037ca
movsx eax, byte [0x40a7d3]
movsx ecx, byte [0x40a7d2]
shl eax, 8
or eax, ecx
movsx ecx, byte [0x40a7d1]
shl eax, 8
or eax, ecx
movsx ecx, byte [str.___]
shl eax, 8
or eax, ecx
cmp dword [esi], eax
je 0x4037ca
dec esi
cmp esi, ebp
jae 0x4037c1
cmp esi, ebp
mov dword [esp + 0x10], str.Error_launching_installer
jb 0x403841
mov byte [esi], bl
add esi, 4
push esi
call fcn.00405cad
test eax, eax
je 0x403816
push esi
push 0x42c400
call fcn.00406112
push esi
push 0x42c800
call fcn.00406112
mov dword [esp + 0x10], ebx
or dword [0x4263ec], 0xffffffff
call fcn.00403ab5
push 1
mov dword [esp + 0x1c], eax
call fcn.00406416
call fcn.004039ba
call dword [sym.imp.ole32.dll_OleUninitialize]
cmp dword [esp + 0x10], ebx
je 0x40391f
push 0x200010
push dword [esp + 0x14]
call fcn.004058ee
push 2
call dword [sym.imp.KERNEL32.dll_ExitProcess]
push str.nsu.tmp
push edi
call sub.KERNEL32.dll_lstrcatA
mov esi, 0x42cc00
push esi
push edi
call dword [sym.imp.KERNEL32.dll_lstrcmpiA]
test eax, eax
je 0x403816
push ebx
push edi
call dword [sym.imp.KERNEL32.dll_CreateDirectoryA]
push edi
call dword [sym.imp.KERNEL32.dll_SetCurrentDirectoryA]
cmp byte [0x42c400], bl
jne 0x40387f
push esi
push 0x42c400
call fcn.00406112
push dword [esp + 0x1c]
push section..ndata
call fcn.00406112
movsx cx, byte [0x40a7c0]
xor eax, eax
push 0x1a
mov ah, byte [0x40a7c1]
pop ebp
or eax, ecx
mov esi, 0x4208f8
mov word [0x427400], ax
mov eax, dword [0x426350]
push dword [eax + 0x120]
push esi
call fcn.00406134
push esi
call dword [sym.imp.KERNEL32.dll_DeleteFileA]
cmp dword [esp + 0x10], ebx
je 0x40390a
push 1
push esi
push 0x42dc00
call dword [sym.imp.KERNEL32.dll_CopyFileA]
test eax, eax
je 0x40390a
push ebx
push esi
call fcn.00405fc6
mov eax, dword [0x426350]
push dword [eax + 0x124]
push esi
call fcn.00406134
push esi
call fcn.0040588d
cmp eax, ebx
je 0x40390a
push eax
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov dword [esp + 0x10], ebx
inc byte [0x427400]
dec ebp
jne 0x4038ad
push ebx
push edi
call fcn.00405fc6
jmp 0x403816
cmp dword [0x4263d4], ebx
je 0x4039a2
push 3
call fcn.004065ea
push 4
mov ebp, eax
call fcn.004065ea
push 5
mov esi, eax
call fcn.004065ea
cmp ebp, ebx
mov edi, eax
je 0x40398e
cmp esi, ebx
je 0x40398e
cmp edi, ebx
je 0x40398e
lea eax, [esp + 0x1c]
push eax
push 0x28
call dword [sym.imp.KERNEL32.dll_GetCurrentProcess]
push eax
call ebp
test eax, eax
je 0x40398e
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 ebx
push 2
call dword [sym.imp.USER32.dll_ExitWindowsEx]
test eax, eax
jne 0x4039a2
push 9
call fcn.0040140b
mov eax, dword [0x4263ec]
cmp eax, 0xffffffff
je 0x4039b0
mov dword [esp + 0x18], eax
push dword [esp + 0x18]
call dword [sym.imp.KERNEL32.dll_ExitProcess]