Function at 0x4d3e9b
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 0x4d3eca
mov dword [ebp - 0x30], ebx
mov byte [ebp - 1], 0x10
jmp 0x4d3ed4
mov dword [ebp - 0x30], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.004d832c
test eax, eax
pop ecx
je 0x4d3eef
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.004b40af
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.004b862d
test eax, eax
pop ecx
je 0x4d3f0a
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.004b40af
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x4d3f27
test ecx, 0x74000
jne 0x4d3f23
cmp dword [ebp - 0x24], eax
je 0x4d3f27
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, SysReAllocString
je 0x4d3f81
dec eax
je 0x4d3f6b
dec eax
je 0x4d3f66
call fcn.004b80d9
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.004b80c6
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.004b41e3
add esp, 0x14
jmp 0x4d4534
mov dword [ebp - 8], edx
jmp 0x4d3f84
test cl, 8
je 0x4d3f78
test ecx, 0x70000
jne 0x4d3f66
mov dword [ebp - 8], 0x40000000
jmp 0x4d3f84
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x4d3fc5
sub eax, ecx
je 0x4d3fbc
sub eax, ecx
je 0x4d3fb3
sub eax, ecx
je 0x4d3faa
sub eax, 0x40
jne 0x4d3f40
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x4d3fc8
mov dword [ebp - 0x10], 3
jmp 0x4d3fc8
mov dword [ebp - 0x10], 2
jmp 0x4d3fc8
mov dword [ebp - 0x10], 1
jmp 0x4d3fc8
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 0x4d401b
je 0x4d4012
cmp eax, ebx
je 0x4d4012
cmp eax, edi
je 0x4d4009
cmp eax, 0x200
je 0x4d408e
cmp eax, 0x300
jne 0x4d3f40
mov dword [ebp - 0x14], 2
jmp 0x4d4038
mov dword [ebp - 0x14], 4
jmp 0x4d4038
mov dword [ebp - 0x14], 3
jmp 0x4d4038
cmp eax, 0x500
je 0x4d4031
cmp eax, 0x600
je 0x4d408e
cmp eax, edx
jne 0x4d3f40
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x4d405c
mov ecx, dword [0x52888c]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x4d405c
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x4d4078
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x4d4078
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x4d4081
or dword [ebp - 0xc], edi
test al, 0x20
je 0x4d4097
or dword [ebp - 0xc], 0x8000000
jmp 0x4d40a2
mov dword [ebp - 0x14], 5
jmp 0x4d4038
test al, 0x10
je 0x4d40a2
or dword [ebp - 0xc], 0x10000000
call fcn.004d3b48
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x4d40c8
call fcn.004b80d9
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.004b80c6
mov dword [eax], 0x18
jmp 0x4d4156
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 0x4d4162
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x4d412e
test byte [ebp + 0x10], 1
je 0x4d412e
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 0x4d4162
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x52a940]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.004b80ec
pop ecx
call fcn.004b80c6
mov eax, dword [eax]
jmp 0x4d45f0
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x4d41b3
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x52a940]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.004b80ec
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x4d4156
call fcn.004b80c6
mov dword [eax], 0xd
jmp 0x4d4156
cmp eax, 2
jne 0x4d41be
or byte [ebp - 1], 0x40
jmp 0x4d41c7
cmp eax, 3
jne 0x4d41c7
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.004d3917
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x52a940]
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 + 0x52a940]
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 0x4d429d
test cl, 0x80
je 0x4d436d
test byte [ebp + 0x10], 2
je 0x4d429d
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.004c0b5d
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x4d425b
call fcn.004b80d9
cmp dword [eax], 0x83
je 0x4d429d
push dword [esi]
call fcn.004c0024
jmp 0x4d4155
push 1
lea eax, [ebp - 0x2c]
push eax
push dword [esi]
mov dword [ebp - 0x2c], ebx
call fcn.004c049f
add esp, 0xc
test eax, eax
jne 0x4d428d
cmp word [ebp - 0x2c], 0x1a
jne 0x4d428d
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.004d7f71
add esp, 0xc
cmp eax, edi
je 0x4d424f
push ebx
push ebx
push dword [esi]
call fcn.004c0b5d
add esp, 0xc
cmp eax, edi
je 0x4d424f
test byte [ebp - 1], 0x80
je 0x4d436d
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x4d42c5
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x4d42c2
or dword [ebp + 0x10], edi
jmp 0x4d42c5
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x4d4312
cmp eax, 0x10000
je 0x4d42fe
cmp eax, 0x14000
je 0x4d42fe
cmp eax, 0x20000
je 0x4d430c
cmp eax, 0x24000
je 0x4d430c
cmp eax, 0x40000
je 0x4d42f8
cmp eax, 0x44000
jne 0x4d4315
mov byte [ebp - 2], 1
jmp 0x4d4315
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x4d4315
mov byte [ebp - 2], 2
jmp 0x4d4315
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x4d436d
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x4d436d
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x4d44c7
cmp eax, 0x80000000
je 0x4d448e
cmp eax, ecx
jne 0x4d436d
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x4d436d
cmp eax, 2
jbe 0x4d456f
cmp eax, 4
jbe 0x4d4460
cmp eax, 5
je 0x4d456f
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x52a940]
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 + 0x52a940]
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 0x4d43df
test byte [ebp + 0x10], 8
je 0x4d43df
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x52a940]
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 0x4d45ee
test byte [ebp + 0x10], 1
je 0x4d45ee
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 0x4d45d7
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.004b80ec
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x52a940]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.004d3994
pop ecx
jmp 0x4d4155
push 2
push ebx
push ebx
push dword [esi]
call fcn.004d1038
add esp, 0x10
or eax, edx
je 0x4d456f
push ebx
push ebx
push ebx
push dword [esi]
call fcn.004d1038
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x4d424f
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.004c049f
add esp, 0xc
cmp eax, 0xffffffff
je 0x4d424f
cmp eax, 2
je 0x4d4513
cmp eax, 3
jne 0x4d4561
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x4d4513
mov byte [ebp - 2], 1
jmp 0x4d436d
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x4d436d
cmp eax, 2
jbe 0x4d456f
cmp eax, 4
ja 0x4d4364
push 2
push ebx
push ebx
push dword [esi]
call fcn.004d1038
add esp, 0x10
or eax, edx
je 0x4d456f
push ebx
push ebx
push ebx
push dword [esi]
call fcn.004d1038
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x4d436d
jmp 0x4d424f
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x4d453b
push dword [esi]
call fcn.004c0024
pop ecx
call fcn.004b80c6
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x4d45f0
cmp eax, 0xfeff
jne 0x4d4561
push ebx
push 2
push dword [esi]
call fcn.004c0b5d
add esp, 0xc
cmp eax, 0xffffffff
je 0x4d424f
mov byte [ebp - 2], 2
jmp 0x4d436d
push ebx
push ebx
push dword [esi]
call fcn.004c0b5d
add esp, 0xc
jmp 0x4d4505
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x4d458f
dec eax
jne 0x4d436d
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x4d459d
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.004c1781
add esp, 0xc
cmp eax, 0xffffffff
je 0x4d45c3
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x4d459d
jmp 0x4d436d
push dword [esi]
call fcn.004c0024
pop ecx
call fcn.004b80c6
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x4d45f0
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x52a940]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret