Function at 0x550b30
Capabilities:
Get file size
Query or enumerate registry value
Read file on windows
Set registry value

Disassembly:
push ebp
lea ebp, [esp - 0x888]
sub esp, 0x888
push 0xffffffffffffffff
push 0x65281e
mov eax, dword fs:[0]
push eax
sub esp, 0x40
mov eax, dword [0x7496c8]
xor eax, ebp
mov dword [ebp + 0x884], eax
push ebx
push esi
push edi
push eax
lea eax, [ebp - 0xc]
mov dword fs:[0], eax
mov dword [ebp - 0x10], esp
mov esi, ecx
mov dword [ebp - 0x48], esi
mov edi, dword [ebp + 0x890]
mov ebx, dword [ebp + 0x894]
mov dword [ebp - 0x28], ebx
mov dword [ebp - 4], 0
cmp dword [esi + 0x88], 0
je 0x550b95
call fcn.005509a0
push 0x70
call fcn.005e7678
add esp, 4
mov dword [ebp - 0x40], eax
mov byte [ebp - 4], 1
test eax, eax
je 0x550bb3
mov ecx, eax
call fcn.00557000
jmp 0x550bb5
xor eax, eax
mov byte [ebp - 4], 0
mov dword [esi + 0x88], eax
test eax, eax
je 0x550c0e
mov ecx, dword [esi + 0xd4]
mov dword [eax + 0x64], ecx
mov edx, dword [esi + 0x88]
mov eax, dword [esi + 0xdc]
mov dword [edx + 0x68], eax
mov ecx, dword [esi + 0x88]
mov dword [ecx], edi
push ebx
mov ecx, dword [esi + 0x88]
call fcn.00556d10
test eax, eax
je 0x550c18
mov ecx, dword [esi + 0x88]
test ecx, ecx
je 0x550c04
push 1
call fcn.0054b160
mov dword [esi + 0x88], 0
mov eax, 0x753b
jmp 0x5511b6
lea ecx, [ebp - 0x14]
call fcn.00402500
mov byte [ebp - 4], 2
cmp dword [esi + 0xcc], 0
je 0x551062
mov edx, dword [edi + 0xc0]
mov byte [edx + 0x171], 1
mov dword [ebp - 0x44], 0x10
lea eax, [ebp - 0x44]
push eax
lea ecx, [ebp - 0x3c]
push ecx
push 0
push 0
push 0x679708
mov edx, dword [esi + 0xdc]
push edx
call dword [sym.imp.ADVAPI32.dll_RegQueryValueExA]
test eax, eax
jne 0x551031
push eax
push eax
push 3
push eax
push 1
push 0x80000000
push ebx
call dword [sym.imp.KERNEL32.dll_CreateFileW]
mov ebx, eax
cmp ebx, 0xffffffff
je 0x550d1e
lea eax, [ebp - 0x40]
push eax
push ebx
call dword [sym.imp.KERNEL32.dll_GetFileSize]
mov dword [ebp - 0x20], eax
xor ecx, ecx
mov dword [ebp - 0x1c], ecx
cmp eax, 0xffffffff
jne 0x550cd6
test ecx, ecx
jne 0x550cd6
call dword [sym.imp.KERNEL32.dll_GetLastError]
test eax, eax
je 0x550cd6
push eax
push str.Error_in_GetFileSize____errcode___ld._n
lea ecx, [ebp - 0x14]
push ecx
call fcn.00402f80
add esp, 0xc
mov edx, dword [ebp - 0x14]
push edx
mov ecx, esi
call fcn.0054b1b0
xor eax, eax
mov dword [ebp - 0x20], eax
mov dword [ebp - 0x1c], eax
jmp 0x550ceb
push 1
push 0
push 0
mov eax, dword [ebp - 0x40]
push eax
call fcn.00617ef0
add dword [ebp - 0x20], eax
adc dword [ebp - 0x1c], edx
push ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov edx, dword [ebp - 0x20]
or edx, dword [ebp - 0x1c]
je 0x550d69
mov eax, dword [edi + 0xc0]
mov eax, dword [eax + 0x24]
cmp eax, 1
je 0x550d11
cmp eax, 2
je 0x550d11
test eax, eax
jne 0x550d69
mov ecx, dword [ebp - 0x28]
push ecx
mov ecx, edi
call fcn.00557a80
jmp 0x550d75
mov ecx, dword [ebp - 0x28]
push ecx
lea ecx, [ebp - 0x18]
call fcn.00417fb0
mov byte [ebp - 4], 3
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
mov edx, dword [ebp - 0x18]
push edx
push str.Error_opening_file__s__errcode___ld._n
lea eax, [ebp - 0x14]
push eax
call fcn.00402f80
add esp, 0x10
mov ecx, dword [ebp - 0x14]
push ecx
mov ecx, esi
call fcn.0054b1b0
xor eax, eax
mov dword [ebp - 0x20], eax
mov dword [ebp - 0x1c], eax
mov byte [ebp - 4], 2
lea ecx, [ebp - 0x18]
call fcn.00402570
mov edx, dword [ebp - 0x28]
push edx
lea ecx, [edi + 0x10]
call fcn.005613c0
mov ebx, eax
test ebx, ebx
je 0x550de9
mov eax, dword [ebp - 0x28]
push eax
lea ecx, [ebp - 0x18]
call fcn.00417fb0
mov byte [ebp - 4], 4
push ebx
mov ecx, dword [ebp - 0x18]
push ecx
push str.Error_opening_file__s__errcode___ld._n
lea edx, [ebp - 0x14]
push edx
call fcn.00402f80
add esp, 0x10
mov eax, dword [ebp - 0x14]
push eax
mov ecx, esi
call fcn.0054b1b0
mov ecx, dword [esi + 0x88]
test ecx, ecx
je 0x550dbd
push 1
call fcn.0054b160
mov dword [esi + 0x88], 0
mov byte [ebp - 4], 2
lea ecx, [ebp - 0x18]
call fcn.00402570
mov byte [ebp - 4], 0
lea ecx, [ebp - 0x14]
call fcn.00402570
mov eax, 0x7534
jmp 0x5511b6
mov ecx, dword [edi + 0xc0]
cmp dword [ecx + 0xe0], 0
jne 0x550ec1
cmp dword [ebp - 0x1c], 0
jl 0x550ec1
jg 0x550e15
cmp dword [ebp - 0x20], 0x800
jb 0x550ec1
push 0
push 0
push 3
push 0
push 3
push 0x80000000
mov edx, dword [ebp - 0x28]
push edx
call dword [sym.imp.KERNEL32.dll_CreateFileW]
mov ebx, eax
cmp ebx, 0xffffffff
je 0x550ec1
push 0x801
push 0
lea eax, [ebp]
push eax
call fcn.00613900
add esp, 0xc
mov dword [ebp - 0x18], 0
push 0
lea ecx, [ebp - 0x18]
push ecx
push 0x800
lea edx, [ebp]
push edx
push ebx
call dword [sym.imp.KERNEL32.dll_ReadFile]
test eax, eax
je 0x550eba
cmp dword [ebp - 0x18], 0x800
jne 0x550eba
mov byte [ebp - 0x21], 0
push 0x80c
call fcn.005e7678
add esp, 4
mov dword [ebp - 0x4c], eax
mov byte [ebp - 4], 5
test eax, eax
je 0x550ea8
lea ecx, [ebp - 0x21]
push ecx
lea edx, [ebp]
push edx
push 0x800
mov ecx, eax
call fcn.0054c4b0
jmp 0x550eaa
xor eax, eax
mov byte [ebp - 4], 2
mov ecx, dword [edi + 0xc0]
mov dword [ecx + 0xe0], eax
push ebx
call dword [sym.imp.KERNEL32.dll_CloseHandle]
mov edx, dword [ebp - 0x38]
mov dword [ebp - 0x18], edx
mov eax, dword [ebp - 0x20]
mov dword [edi + 0x60], eax
mov ecx, dword [ebp - 0x1c]
mov dword [edi + 0x64], ecx
mov eax, dword [edi + 0xa4]
mov edx, dword [esi + 0xa0]
mov dword [eax], edx
mov ecx, dword [esi + 0xa4]
mov dword [eax + 4], ecx
mov eax, dword [ebp - 0x38]
cmp eax, 0xffffffff
jne 0x550f05
xor eax, eax
mov dword [esi + 0x94], eax
mov dword [esi + 0xcc], eax
jmp 0x550fd2
push eax
push 0x66b41c
lea edx, [ebp + 0x844]
push edx
call fcn.0061611b
add esp, 0xc
lea eax, [ebp - 0x44]
push eax
lea ecx, [ebp - 0x3c]
push ecx
xor ebx, ebx
push ebx
push ebx
lea edx, [ebp + 0x844]
push edx
mov eax, dword [esi + 0xdc]
push eax
call dword [sym.imp.ADVAPI32.dll_RegQueryValueExA]
test eax, eax
je 0x550f4f
mov dword [esi + 0x94], ebx
mov dword [esi + 0xcc], ebx
jmp 0x550fd2
mov ecx, dword [ebp - 0x34]
sub ecx, 1
mov edx, dword [ebp - 0x30]
sbb edx, ebx
mov eax, dword [esi + 0x88]
mov eax, dword [eax]
mov dword [eax + 0x70], ecx
mov dword [eax + 0x74], edx
mov ecx, dword [ebp - 0x3c]
dec ecx
mov dword [esi + 0x94], ecx
mov eax, dword [esi + 0x88]
mov dword [esi + 0x8c], eax
mov edx, dword [edi + 0xc0]
mov ecx, dword [edx + 0x24]
cmp ecx, 4
je 0x550f91
cmp ecx, 5
jne 0x550fd2
mov ecx, dword [ebp - 0x34]
mov dword [eax + 0x20], ecx
mov edx, dword [esi + 0x88]
mov eax, dword [ebp - 0x3c]
mov dword [edx + 0x28], eax
mov ebx, dword [esi + 0x88]
push 0
push 0xa
lea ecx, [ebp + 0x804]
push ecx
mov edx, dword [ebp - 0x3c]
push edx
call fcn.00615fa2
add esp, 0xc
push eax
mov eax, dword [ebx + 0x10]
push eax
push 0x66add0
lea ecx, [ebx + 0x2c]
call fcn.00402320
mov ecx, dword [ebp - 0x28]
push ecx
lea ecx, [ebp - 0x2c]
call fcn.00417fb0
mov byte [ebp - 4], 6
mov ecx, dword [esi + 0x88]
mov eax, dword [ecx]
mov edx, dword [eax + 0x74]
push edx
mov edx, dword [eax + 0x70]
push edx
mov edx, dword [ebp - 0x2c]
push edx
mov edx, dword [eax + 0x64]
push edx
mov eax, dword [eax + 0x60]
push eax
mov ecx, dword [ecx + 0x60]
push ecx
push str.first_listitem_id___d__startpos___I64d__file__s__endpos___I64d_n
lea edx, [ebp - 0x14]
push edx
call fcn.00402f80
add esp, 0x20
mov eax, dword [ebp - 0x14]
push eax
mov ecx, esi
call fcn.0054b1b0
mov byte [ebp - 4], 2
lea ecx, [ebp - 0x2c]
call fcn.00402570
xor ebx, ebx
jmp 0x5510d8
mov ecx, dword [esi + 0x88]
test ecx, ecx
je 0x551042
push 1
call fcn.0054b160
mov dword [esi + 0x88], 0
mov byte [ebp - 4], 0
lea ecx, [ebp - 0x14]
call fcn.00402570
mov eax, 0x7541
jmp 0x5511b6
push ebx
lea ecx, [edi + 0x10]
call fcn.00560bc0
mov ebx, eax
test ebx, ebx
je 0x5510c9
mov ecx, dword [ebp - 0x28]
push ecx
lea ecx, [ebp - 0x2c]
call fcn.00417fb0
mov byte [ebp - 4], 7
push ebx
mov edx, dword [ebp - 0x2c]
push edx
push str.Error_opening_file__s__errcode___ld._n
lea eax, [ebp - 0x14]
push eax
call fcn.00402f80
add esp, 0x10
mov ecx, dword [ebp - 0x14]
push ecx
mov ecx, esi
call fcn.0054b1b0
mov ecx, dword [esi + 0x88]
test ecx, ecx
je 0x5510b3
push 1
call fcn.0054b160
mov dword [esi + 0x88], 0
mov byte [ebp - 4], 2
lea ecx, [ebp - 0x2c]
jmp 0x550dce
mov ecx, edi
call fcn.0054ae70
xor ebx, ebx
mov dword [esi + 0x94], ebx
mov edx, dword [esi + 0x88]
mov dword [edi + 0xa0], edx
mov eax, dword [esi + 0x88]
mov dword [eax + 0x60], ebx
mov ecx, dword [esi + 0x88]
mov dword [ecx + 0x58], ebx
cmp dword [esi + 0xcc], ebx
jne 0x55112e
mov eax, dword [esi + 0xdc]
cmp eax, ebx
je 0x551145
mov dword [ebp - 0x3c], ebx
mov dword [ebp - 0x34], ebx
mov dword [ebp - 0x30], ebx
mov dword [ebp - 0x38], 0xffffffff
push 0x10
lea edx, [ebp - 0x3c]
push edx
push ebx
push ebx
push 0x679708
push eax
call dword [sym.imp.ADVAPI32.dll_RegSetValueExA]
jmp 0x551145
mov eax, dword [ebp - 0x18]
cmp eax, 0xffffffff
je 0x551145
push eax
mov eax, dword [esi + 0x88]
push eax
mov ecx, esi
call fcn.0054de90
mov esi, dword [esi + 0x88]
mov ecx, dword [edi + 0x60]
mov dword [esi + 8], ecx
mov edx, dword [edi + 0x64]
mov dword [esi + 0xc], edx
mov eax, dword [edi + 0x60]
mov dword [edi + 0x68], eax
mov ecx, dword [edi + 0x64]
mov dword [edi + 0x6c], ecx
cmp dword [edi + 0x74], ebx
jl 0x551189
jg 0x55116f
cmp dword [edi + 0x70], ebx
jbe 0x551189
mov edx, dword [edi + 0xc0]
mov eax, dword [edx + 0x24]
cmp eax, 4
je 0x551189
cmp eax, 5
je 0x551189
mov ecx, edi
call fcn.00557cd0
mov byte [ebp - 4], 0
lea ecx, [ebp - 0x14]
call fcn.00402570
xor eax, eax
jmp 0x5511b6
mov ecx, dword [ebp - 0xc]
mov dword fs:[0], ecx
pop ecx
pop edi
pop esi
pop ebx
mov ecx, dword [ebp + 0x884]
xor ecx, ebp
call fcn.00613241
add ebp, 0x888
mov esp, ebp
pop ebp
ret 8