Function at 0x423d31
Capabilities:
Encrypt data using speck

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x38
push ebx
xor ebx, ebx
test byte [ebp + 0x10], 0x80
push esi
push edi
mov esi, eax
mov dword [ebp - 0x24], ebx
mov dword [ebp - 0x28], ebx
mov byte [ebp - 2], bl
mov dword [ebp - 0x38], 0xc
mov dword [ebp - 0x34], ebx
je 0x423d60
mov dword [ebp - 0x30], ebx
mov byte [ebp - 1], 0x10
jmp 0x423d6a
mov dword [ebp - 0x30], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.00425689
test eax, eax
pop ecx
je 0x423d85
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.00416e7a
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.004171a5
test eax, eax
pop ecx
je 0x423da0
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.00416e7a
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x423dbd
test ecx, 0x74000
jne 0x423db9
cmp dword [ebp - 0x24], eax
je 0x423dbd
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, SysReAllocString
je 0x423e17
dec eax
je 0x423e01
dec eax
je 0x423dfc
call fcn.00418dad
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00418d9a
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.00416f76
add esp, 0x14
jmp 0x4243ca
mov dword [ebp - 8], edx
jmp 0x423e1a
test cl, 8
je 0x423e0e
test ecx, 0x70000
jne 0x423dfc
mov dword [ebp - 8], 0x40000000
jmp 0x423e1a
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x423e5b
sub eax, ecx
je 0x423e52
sub eax, ecx
je 0x423e49
sub eax, ecx
je 0x423e40
sub eax, 0x40
jne 0x423dd6
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x423e5e
mov dword [ebp - 0x10], 3
jmp 0x423e5e
mov dword [ebp - 0x10], 2
jmp 0x423e5e
mov dword [ebp - 0x10], 1
jmp 0x423e5e
mov dword [ebp - 0x10], ebx
mov eax, dword [ebp + 0x10]
mov edx, 0x700
and eax, edx
mov ecx, 0x400
cmp eax, ecx
mov edi, 0x100
jg 0x423eb1
je 0x423ea8
cmp eax, ebx
je 0x423ea8
cmp eax, edi
je 0x423e9f
cmp eax, 0x200
je 0x423f24
cmp eax, 0x300
jne 0x423dd6
mov dword [ebp - 0x14], 2
jmp 0x423ece
mov dword [ebp - 0x14], 4
jmp 0x423ece
mov dword [ebp - 0x14], 3
jmp 0x423ece
cmp eax, 0x500
je 0x423ec7
cmp eax, 0x600
je 0x423f24
cmp eax, edx
jne 0x423dd6
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x423ef2
mov ecx, dword [0x435fc4]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x423ef2
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x423f0e
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x423f0e
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x423f17
or dword [ebp - 0xc], edi
test al, 0x20
je 0x423f2d
or dword [ebp - 0xc], 0x8000000
jmp 0x423f38
mov dword [ebp - 0x14], 5
jmp 0x423ece
test al, 0x10
je 0x423f38
or dword [ebp - 0xc], 0x10000000
call fcn.004237de
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x423f5e
call fcn.00418dad
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00418d9a
mov dword [eax], 0x18
jmp 0x423fec
mov eax, dword [ebp + 8]
mov edi, dword [sym.imp.KERNEL32.dll_CreateFileW]
push ebx
push dword [ebp - 0xc]
mov dword [eax], 1
push dword [ebp - 0x14]
lea eax, [ebp - 0x38]
push eax
push dword [ebp - 0x10]
push dword [ebp - 8]
push dword [ebp + 0xc]
call edi
cmp eax, 0xffffffff
mov dword [ebp - 0x1c], eax
jne 0x423ff8
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x423fc4
test byte [ebp + 0x10], 1
je 0x423fc4
and dword [ebp - 8], 0x7fffffff
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x38]
push dword [ebp - 0x14]
push eax
push dword [ebp - 0x10]
push dword [ebp - 8]
push dword [ebp + 0xc]
call edi
cmp eax, 0xffffffff
mov dword [ebp - 0x1c], eax
jne 0x423ff8
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x438080]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.00418dc0
pop ecx
call fcn.00418d9a
mov eax, dword [eax]
jmp 0x424486
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x424049
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x438080]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.00418dc0
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x423fec
call fcn.00418d9a
mov dword [eax], 0xd
jmp 0x423fec
cmp eax, 2
jne 0x424054
or byte [ebp - 1], 0x40
jmp 0x42405d
cmp eax, 3
jne 0x42405d
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.004235ad
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x438080]
pop ecx
pop ecx
mov cl, byte [ebp - 1]
or cl, 1
mov byte [edx + eax + 4], cl
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x438080]
lea eax, [edx + eax + 0x24]
and byte [eax], 0x80
mov byte [ebp - 3], cl
and byte [ebp - 3], 0x48
mov byte [ebp - 1], cl
jne 0x424133
test cl, 0x80
je 0x424203
test byte [ebp + 0x10], 2
je 0x424133
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.0041e3ad
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x4240f1
call fcn.00418dad
cmp dword [eax], 0x83
je 0x424133
push dword [esi]
call fcn.0041e099
jmp 0x423feb
push 1
lea eax, [ebp - 0x2c]
push eax
push dword [esi]
mov dword [ebp - 0x2c], ebx
call fcn.0041d80d
add esp, 0xc
test eax, eax
jne 0x424123
cmp word [ebp - 0x2c], 0x1a
jne 0x424123
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.00425419
add esp, 0xc
cmp eax, edi
je 0x4240e5
push ebx
push ebx
push dword [esi]
call fcn.0041e3ad
add esp, 0xc
cmp eax, edi
je 0x4240e5
test byte [ebp - 1], 0x80
je 0x424203
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x42415b
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x424158
or dword [ebp + 0x10], edi
jmp 0x42415b
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x4241a8
cmp eax, 0x10000
je 0x424194
cmp eax, 0x14000
je 0x424194
cmp eax, 0x20000
je 0x4241a2
cmp eax, 0x24000
je 0x4241a2
cmp eax, 0x40000
je 0x42418e
cmp eax, 0x44000
jne 0x4241ab
mov byte [ebp - 2], 1
jmp 0x4241ab
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x4241ab
mov byte [ebp - 2], 2
jmp 0x4241ab
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x424203
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x424203
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x42435d
cmp eax, 0x80000000
je 0x424324
cmp eax, ecx
jne 0x424203
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x424203
cmp eax, 2
jbe 0x424405
cmp eax, 4
jbe 0x4242f6
cmp eax, 5
je 0x424405
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x438080]
lea eax, [ecx + eax + 0x24]
mov cl, byte [eax]
xor cl, byte [ebp - 2]
and cl, 0x7f
xor byte [eax], cl
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x438080]
lea eax, [ecx + eax + 0x24]
mov ecx, dword [ebp + 0x10]
mov dl, byte [eax]
shr ecx, 0x10
shl cl, 7
and dl, 0x7f
or cl, dl
cmp byte [ebp - 3], bl
mov byte [eax], cl
jne 0x424275
test byte [ebp + 0x10], 8
je 0x424275
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x438080]
lea eax, [ecx + eax + 4]
or byte [eax], 0x20
mov edi, dword [ebp - 8]
mov eax, 0xc0000000
mov ecx, edi
and ecx, eax
cmp ecx, eax
jne 0x424484
test byte [ebp + 0x10], 1
je 0x424484
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x38]
push 3
push eax
push dword [ebp - 0x10]
and edi, 0x7fffffff
push edi
push dword [ebp + 0xc]
call dword [sym.imp.KERNEL32.dll_CreateFileW]
cmp eax, 0xffffffff
jne 0x42446d
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.00418dc0
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x438080]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.0042362a
pop ecx
jmp 0x423feb
push 2
push ebx
push ebx
push dword [esi]
call fcn.00422f7b
add esp, 0x10
or eax, edx
je 0x424405
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00422f7b
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x4240e5
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.0041d80d
add esp, 0xc
cmp eax, 0xffffffff
je 0x4240e5
cmp eax, 2
je 0x4243a9
cmp eax, 3
jne 0x4243f7
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x4243a9
mov byte [ebp - 2], 1
jmp 0x424203
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x424203
cmp eax, 2
jbe 0x424405
cmp eax, 4
ja 0x4241fa
push 2
push ebx
push ebx
push dword [esi]
call fcn.00422f7b
add esp, 0x10
or eax, edx
je 0x424405
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00422f7b
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x424203
jmp 0x4240e5
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x4243d1
push dword [esi]
call fcn.0041e099
pop ecx
call fcn.00418d9a
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x424486
cmp eax, 0xfeff
jne 0x4243f7
push ebx
push 2
push dword [esi]
call fcn.0041e3ad
add esp, 0xc
cmp eax, 0xffffffff
je 0x4240e5
mov byte [ebp - 2], 2
jmp 0x424203
push ebx
push ebx
push dword [esi]
call fcn.0041e3ad
add esp, 0xc
jmp 0x42439b
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x424425
dec eax
jne 0x424203
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x424433
mov dword [ebp - 0x18], 0xbfbbef
mov dword [ebp - 0x14], 3
mov eax, dword [ebp - 0x14]
sub eax, edi
push eax
lea eax, [ebp + edi - 0x18]
push eax
push dword [esi]
call fcn.0041f22d
add esp, 0xc
cmp eax, 0xffffffff
je 0x424459
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x424433
jmp 0x424203
push dword [esi]
call fcn.0041e099
pop ecx
call fcn.00418d9a
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x424486
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x438080]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret