Function at 0x45a1a0
Capabilities:
Check if file exists
Delete registry key
Delete registry value
Persist via default file association registry key
Set registry value

Disassembly:
push ebp
mov ebp, esp
push 0xffffffffffffffff
push 0x4d3dc0
mov eax, dword fs:[0]
push eax
sub esp, 0x34
push ebx
push esi
push edi
mov eax, dword [0x50d108]
xor eax, ebp
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov dword [ebp - 0x28], edx
mov ebx, ecx
mov dword [ebp - 0x14], ebx
mov dword [ebp - 4], 3
call fcn.00404900
xor edx, edx
mov ecx, eax
test ecx, ecx
setne dl
test edx, edx
jne 0x45a1f3
push 0x80004005
call fcn.00404660
mov eax, dword [ecx]
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x20], eax
mov byte [ebp - 4], 4
or edi, 0xffffffff
mov eax, dword [ebp + 0x14]
cmp dword [eax - 0xc], 0
je 0x45a21c
lea eax, [ebp + 0x14]
push eax
lea ecx, [ebp - 0x20]
call fcn.00402130
jmp 0x45a25f
lea eax, [ebp - 0x30]
push eax
call fcn.00456350
push str.MasterPDF
mov byte [ebp - 4], 5
push dword [eax]
lea eax, [ebp - 0x20]
push str._s_s.exe
push eax
call fcn.00414020
mov byte [ebp - 4], 4
add esp, 0x14
mov edx, dword [ebp - 0x30]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a25f
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov esi, dword [ebp - 0x20]
push esi
call dword [sym.imp.SHLWAPI.dll_PathFileExistsW]
test eax, eax
jne 0x45a274
xor ebx, ebx
jmp 0x45a6d5
push str.MasterPDF
lea ecx, [ebp - 0x34]
call fcn.004043c0
push 0x4ef448
lea edx, [ebp - 0x34]
mov byte [ebp - 4], 6
lea ecx, [ebp - 0x38]
call fcn.00417600
lea ecx, [ebp + 0xc]
mov byte [ebp - 4], 7
push ecx
mov edx, eax
lea ecx, [ebp - 0x1c]
call fcn.004176d0
add esp, 8
mov byte [ebp - 4], 9
mov eax, edi
mov edx, dword [ebp - 0x38]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a2c8
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
lea eax, [ebp - 0x1c]
mov edx, str.SoftwareClasses_
push eax
lea ecx, [ebp - 0x18]
call fcn.00432210
add esp, 4
mov byte [ebp - 4], 0xa
mov eax, dword [ebp + 0x10]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x30], ecx
nop dword [eax + eax]
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x45a2f0
sub edx, dword [ebp - 0x30]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push 0
push dword [ebp - 0x18]
push ebx
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
call fcn.00404900
xor ecx, ecx
mov edx, eax
test edx, edx
setne cl
test ecx, ecx
jne 0x45a32f
push 0x80004005
call fcn.00404660
mov eax, dword [edx]
mov ecx, edx
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x2c], eax
mov byte [ebp - 4], 0xb
lea eax, [ebp - 0x2c]
push dword [ebp - 0x28]
push esi
push str._s__d
push eax
call fcn.00414020
push str.DefaultIcon
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x28]
call fcn.00417600
mov ebx, dword [ebp - 0x2c]
add esp, 0x14
mov ecx, ebx
mov edx, dword [eax]
lea eax, [ecx + 2]
mov dword [ebp - 0x30], eax
mov ax, word [ecx]
add ecx, 2
test ax, ax
jne 0x45a372
sub ecx, dword [ebp - 0x30]
sar ecx, 1
lea eax, [ecx + ecx]
push eax
push ebx
push 1
push 0
push edx
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x28]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a3af
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
push str._shell
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x30]
call fcn.00417600
add esp, 4
push 8
push str.open
push 1
push 0
push dword [eax]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x30]
mov eax, edi
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a3f2
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
call fcn.00404900
xor ecx, ecx
mov edx, eax
test edx, edx
setne cl
test ecx, ecx
jne 0x45a40e
push 0x80004005
call fcn.00404660
mov eax, dword [edx]
mov ecx, edx
call dword [eax + 0xc]
add eax, 0x10
mov dword [ebp - 0x30], eax
mov byte [ebp - 4], 0xc
lea eax, [ebp - 0x30]
push dword [ebp + 0xc]
push esi
push str.__s____s____1____
push eax
call fcn.00414020
push str._shellopencommand
lea edx, [ebp - 0x18]
lea ecx, [ebp - 0x3c]
call fcn.00417600
mov edi, dword [ebp - 0x30]
add esp, 0x14
mov ecx, edi
mov edx, dword [eax]
lea eax, [ecx + 2]
mov dword [ebp - 0x28], eax
mov ax, word [ecx]
add ecx, 2
test ax, ax
jne 0x45a451
sub ecx, dword [ebp - 0x28]
sar ecx, 1
lea eax, [ecx + ecx]
push eax
push edi
push 1
push 0
push edx
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x3c]
test eax, eax
sete byte [ebp - 0xd]
add edx, 0xfffffff0
or eax, 0xffffffff
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a495
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
cmp byte [ebp - 0xd], 0
jne 0x45a4a7
mov dword [ebp - 0x28], 0
jmp 0x45a63f
lea eax, [ebp + 8]
mov edx, str.SoftwareClasses_
push eax
lea ecx, [ebp - 0x24]
call fcn.00432210
add esp, 4
mov byte [ebp - 4], 0xd
mov eax, dword [ebp - 0x1c]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x3c], ecx
nop word [eax + eax]
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x45a4d0
sub edx, dword [ebp - 0x3c]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push 0
push dword [ebp - 0x24]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
push str.OpenWithProgids
lea edx, [ebp - 0x24]
lea ecx, [ebp - 0x3c]
call fcn.00417600
add esp, 4
push 0
push 0x4ec354
push 1
push dword [ebp - 0x1c]
push dword [eax]
push dword [ebp - 0x14]
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
mov edx, dword [ebp - 0x3c]
or eax, 0xffffffff
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a53a
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
cmp dword [ebp - 0x14], 0x80000001
jne 0x45a619
lea eax, [ebp + 8]
mov edx, str.ExplorerFileExts_
push eax
lea ecx, [ebp - 0x14]
call fcn.00432210
add esp, 4
mov byte [ebp - 4], 0xe
mov eax, dword [ebp - 0x1c]
mov edx, eax
lea ecx, [edx + 2]
mov dword [ebp - 0x3c], ecx
nop word [eax + eax]
mov cx, word [edx]
add edx, 2
test cx, cx
jne 0x45a570
sub edx, dword [ebp - 0x3c]
sar edx, 1
lea ecx, [edx + edx]
push ecx
push eax
push 1
push str.Progid
push dword [ebp - 0x14]
push SysReAllocString
call dword [sym.imp.SHLWAPI.dll_SHSetValueW]
push str.Application
push dword [ebp - 0x14]
push SysReAllocString
call dword [sym.imp.SHLWAPI.dll_SHDeleteValueW]
push str.UserChoice
lea edx, [ebp - 0x14]
lea ecx, [ebp - 0x40]
call fcn.00417600
add esp, 4
mov ecx, SysReAllocString
mov eax, dword [eax]
mov edx, eax
mov dword [ebp - 0x3c], eax
call fcn.00458b30
push dword [ebp - 0x3c]
push SysReAllocString
call dword [sym.imp.SHLWAPI.dll_SHDeleteKeyW]
mov edx, dword [ebp - 0x40]
or eax, 0xffffffff
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a5fa
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 0xd
or eax, 0xffffffff
mov edx, dword [ebp - 0x14]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a619
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 0xc
or eax, 0xffffffff
mov edx, dword [ebp - 0x24]
mov dword [ebp - 0x28], 1
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a63f
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
lea edx, [edi - 0x10]
mov byte [ebp - 4], 0xb
or edi, 0xffffffff
mov eax, edi
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a65d
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 0xa
add ebx, 0xfffffff0
mov eax, edi
lock xadd dword [ebx + 0xc], eax
dec eax
test eax, eax
jg 0x45a678
mov ecx, dword [ebx]
push ebx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 9
mov eax, edi
mov edx, dword [ebp - 0x18]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a696
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 6
mov eax, edi
mov edx, dword [ebp - 0x1c]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a6b4
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 4
mov eax, edi
mov edx, dword [ebp - 0x34]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a6d2
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov ebx, dword [ebp - 0x28]
mov byte [ebp - 4], 3
add esi, 0xfffffff0
mov eax, edi
lock xadd dword [esi + 0xc], eax
dec eax
test eax, eax
jg 0x45a6f0
mov ecx, dword [esi]
push esi
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 2
mov eax, edi
mov edx, dword [ebp + 8]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a70e
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 1
mov eax, edi
mov edx, dword [ebp + 0xc]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a72c
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov byte [ebp - 4], 0
mov eax, edi
mov edx, dword [ebp + 0x10]
add edx, 0xfffffff0
lock xadd dword [edx + 0xc], eax
dec eax
test eax, eax
jg 0x45a74a
mov ecx, dword [edx]
push edx
mov eax, dword [ecx]
call dword [eax + 4]
mov dword [ebp - 4], 0xffffffff
mov eax, dword [ebp + 0x14]
add eax, 0xfffffff0
lock xadd dword [eax + 0xc], edi
dec edi
test edi, edi
jg 0x45a769
mov ecx, dword [eax]
push eax
mov edx, dword [ecx]
call dword [edx + 4]
mov eax, ebx
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov esp, ebp
pop ebp
ret