Function at 0x437a7b
Capabilities:
Encrypt data using speck

Disassembly:
push ebp
mov ebp, esp
sub esp, 0x34
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 - 0x34], 0xc
mov dword [ebp - 0x30], ebx
je 0x437aaa
mov dword [ebp - 0x2c], ebx
mov byte [ebp - 1], 0x10
jmp 0x437ab4
mov dword [ebp - 0x2c], 1
mov byte [ebp - 1], bl
lea eax, [ebp - 0x24]
push eax
call fcn.0043a1f5
test eax, eax
pop ecx
je 0x437acf
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.00426e93
add esp, 0x14
lea eax, [ebp - 0x28]
push eax
call fcn.00428be8
test eax, eax
pop ecx
je 0x437aea
push ebx
push ebx
push ebx
push ebx
push ebx
call fcn.00426e93
add esp, 0x14
mov ecx, dword [ebp + 0x10]
mov eax, 0x8000
test eax, ecx
jne 0x437b07
test ecx, 0x74000
jne 0x437b03
cmp dword [ebp - 0x24], eax
je 0x437b07
or byte [ebp - 1], 0x80
mov eax, ecx
and eax, 3
sub eax, ebx
mov edx, 0xc0000000
mov edi, 0x80000000
je 0x437b61
dec eax
je 0x437b4b
dec eax
je 0x437b46
call fcn.00428ea9
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00428e96
push 0x16
pop esi
push ebx
push ebx
push ebx
push ebx
push ebx
mov dword [eax], esi
call fcn.00426f8f
add esp, 0x14
jmp 0x438113
mov dword [ebp - 8], edx
jmp 0x437b64
test cl, 8
je 0x437b58
test ecx, 0x70000
jne 0x437b46
mov dword [ebp - 8], 0x40000000
jmp 0x437b64
mov dword [ebp - 8], edi
mov eax, dword [ebp + 0x14]
push 0x10
pop ecx
sub eax, ecx
je 0x437ba5
sub eax, ecx
je 0x437b9c
sub eax, ecx
je 0x437b93
sub eax, ecx
je 0x437b8a
sub eax, 0x40
jne 0x437b20
cmp dword [ebp - 8], edi
sete al
mov dword [ebp - 0x10], eax
jmp 0x437ba8
mov dword [ebp - 0x10], 3
jmp 0x437ba8
mov dword [ebp - 0x10], 2
jmp 0x437ba8
mov dword [ebp - 0x10], 1
jmp 0x437ba8
mov dword [ebp - 0x10], ebx
mov eax, dword [ebp + 0x10]
mov edx, 0x700
and eax, edx
mov ecx, 0x400
cmp eax, ecx
mov edi, pe_nt_image_headers32
jg 0x437bfb
je 0x437bf2
cmp eax, ebx
je 0x437bf2
cmp eax, edi
je 0x437be9
cmp eax, 0x200
je 0x437c6e
cmp eax, 0x300
jne 0x437b20
mov dword [ebp - 0x14], 2
jmp 0x437c18
mov dword [ebp - 0x14], 4
jmp 0x437c18
mov dword [ebp - 0x14], 3
jmp 0x437c18
cmp eax, 0x500
je 0x437c11
cmp eax, 0x600
je 0x437c6e
cmp eax, edx
jne 0x437b20
mov dword [ebp - 0x14], 1
mov eax, dword [ebp + 0x10]
test edi, eax
mov dword [ebp - 0xc], 0x80
je 0x437c3c
mov ecx, dword [0x45efe8]
not ecx
and ecx, dword [ebp + 0x18]
test cl, cl
js 0x437c3c
mov dword [ebp - 0xc], 1
test al, 0x40
je 0x437c58
or dword [ebp - 0xc], 0x4000000
or dword [ebp - 8], 0x10000
cmp dword [ebp - 0x28], 2
jne 0x437c58
or dword [ebp - 0x10], 4
test ax, 0x1000
je 0x437c61
or dword [ebp - 0xc], edi
test al, 0x20
je 0x437c77
or dword [ebp - 0xc], 0x8000000
jmp 0x437c82
mov dword [ebp - 0x14], 5
jmp 0x437c18
test al, 0x10
je 0x437c82
or dword [ebp - 0xc], 0x10000000
call fcn.0043775c
cmp eax, 0xffffffff
mov dword [esi], eax
jne 0x437ca8
call fcn.00428ea9
mov dword [eax], ebx
or dword [esi], 0xffffffff
call fcn.00428e96
mov dword [eax], 0x18
jmp 0x437d36
mov eax, dword [ebp + 8]
mov edi, dword [sym.imp.KERNEL32.dll_CreateFileA]
push ebx
push dword [ebp - 0xc]
mov dword [eax], 1
push dword [ebp - 0x14]
lea eax, [ebp - 0x34]
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 0x437d42
mov ecx, dword [ebp - 8]
mov eax, 0xc0000000
and ecx, eax
cmp ecx, eax
jne 0x437d0e
test byte [ebp + 0x10], 1
je 0x437d0e
and dword [ebp - 8], 0x7fffffff
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x34]
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 0x437d42
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x4647a0]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.00428ebc
pop ecx
call fcn.00428e96
mov eax, dword [eax]
jmp 0x4381cf
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_GetFileType]
cmp eax, ebx
jne 0x437d93
mov esi, dword [esi]
mov eax, esi
and esi, 0x1f
imul esi, esi, 0x38
sar eax, 5
mov eax, dword [eax*4 + 0x4647a0]
lea eax, [eax + esi + 4]
and byte [eax], 0xfe
call dword [sym.imp.KERNEL32.dll_GetLastError]
mov esi, eax
push esi
call fcn.00428ebc
pop ecx
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
cmp esi, ebx
jne 0x437d36
call fcn.00428e96
mov dword [eax], 0xd
jmp 0x437d36
cmp eax, 2
jne 0x437d9e
or byte [ebp - 1], 0x40
jmp 0x437da7
cmp eax, 3
jne 0x437da7
or byte [ebp - 1], 8
push dword [ebp - 0x1c]
push dword [esi]
call fcn.0043752b
mov eax, dword [esi]
mov edx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar edx, 5
mov edx, dword [edx*4 + 0x4647a0]
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 + 0x4647a0]
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 0x437e7c
test cl, 0x80
je 0x437f4c
test byte [ebp + 0x10], 2
je 0x437e7c
push 2
or edi, 0xffffffff
push edi
push dword [esi]
call fcn.004320cd
add esp, 0xc
cmp eax, edi
mov dword [ebp - 0x18], eax
jne 0x437e3b
call fcn.00428ea9
cmp dword [eax], 0x83
je 0x437e7c
push dword [esi]
call fcn.0043213f
jmp 0x437d35
push 1
lea eax, [ebp - 4]
push eax
push dword [esi]
mov byte [ebp - 4], bl
call fcn.00430838
add esp, 0xc
test eax, eax
jne 0x437e6c
cmp byte [ebp - 4], 0x1a
jne 0x437e6c
mov eax, dword [ebp - 0x18]
cdq
push edx
push eax
push dword [esi]
call fcn.00439f85
add esp, 0xc
cmp eax, edi
je 0x437e2f
push ebx
push ebx
push dword [esi]
call fcn.004320cd
add esp, 0xc
cmp eax, edi
je 0x437e2f
test byte [ebp - 1], 0x80
je 0x437f4c
mov ecx, 0x74000
test dword [ebp + 0x10], ecx
mov edi, 0x4000
jne 0x437ea4
mov eax, dword [ebp - 0x24]
and eax, ecx
jne 0x437ea1
or dword [ebp + 0x10], edi
jmp 0x437ea4
or dword [ebp + 0x10], eax
mov eax, dword [ebp + 0x10]
and eax, ecx
cmp eax, edi
je 0x437ef1
cmp eax, 0x10000
je 0x437edd
cmp eax, 0x14000
je 0x437edd
cmp eax, 0x20000
je 0x437eeb
cmp eax, 0x24000
je 0x437eeb
cmp eax, 0x40000
je 0x437ed7
cmp eax, 0x44000
jne 0x437ef4
mov byte [ebp - 2], 1
jmp 0x437ef4
mov ecx, dword [ebp + 0x10]
mov eax, 0x301
and ecx, eax
cmp ecx, eax
jne 0x437ef4
mov byte [ebp - 2], 2
jmp 0x437ef4
mov byte [ebp - 2], bl
test dword [ebp + 0x10], 0x70000
je 0x437f4c
test byte [ebp - 1], 0x40
mov dword [ebp - 0x18], ebx
jne 0x437f4c
mov eax, dword [ebp - 8]
mov ecx, 0xc0000000
and eax, ecx
cmp eax, 0x40000000
je 0x4380a6
cmp eax, 0x80000000
je 0x43806d
cmp eax, ecx
jne 0x437f4c
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x437f4c
cmp eax, 2
jbe 0x43814e
cmp eax, 4
jbe 0x43803f
cmp eax, 5
je 0x43814e
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x4647a0]
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 + 0x4647a0]
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 0x437fbe
test byte [ebp + 0x10], 8
je 0x437fbe
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x4647a0]
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 0x4381cd
test byte [ebp + 0x10], 1
je 0x4381cd
push dword [ebp - 0x1c]
call dword [sym.imp.KERNEL32.dll_CloseHandle]
push ebx
push dword [ebp - 0xc]
lea eax, [ebp - 0x34]
push 3
push eax
push dword [ebp - 0x10]
and edi, 0x7fffffff
push edi
push dword [ebp + 0xc]
call dword [sym.imp.KERNEL32.dll_CreateFileA]
cmp eax, 0xffffffff
jne 0x4381b6
call dword [sym.imp.KERNEL32.dll_GetLastError]
push eax
call fcn.00428ebc
mov eax, dword [esi]
mov ecx, eax
and eax, 0x1f
imul eax, eax, 0x38
sar ecx, 5
mov ecx, dword [ecx*4 + 0x4647a0]
lea eax, [ecx + eax + 4]
and byte [eax], 0xfe
push dword [esi]
call fcn.004375a8
pop ecx
jmp 0x437d35
push 2
push ebx
push ebx
push dword [esi]
call fcn.00430ef6
add esp, 0x10
or eax, edx
je 0x43814e
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00430ef6
and eax, edx
add esp, 0x10
cmp eax, 0xffffffff
je 0x437e2f
push 3
lea eax, [ebp - 0x18]
push eax
push dword [esi]
call fcn.00430838
add esp, 0xc
cmp eax, 0xffffffff
je 0x437e2f
cmp eax, 2
je 0x4380f2
cmp eax, 3
jne 0x438140
cmp dword [ebp - 0x18], 0xbfbbef
jne 0x4380f2
mov byte [ebp - 2], 1
jmp 0x437f4c
mov eax, dword [ebp - 0x14]
cmp eax, ebx
jbe 0x437f4c
cmp eax, 2
jbe 0x43814e
cmp eax, 4
ja 0x437f43
push 2
push ebx
push ebx
push dword [esi]
call fcn.00430ef6
add esp, 0x10
or eax, edx
je 0x43814e
push ebx
push ebx
push ebx
push dword [esi]
call fcn.00430ef6
add esp, 0x10
and eax, edx
cmp eax, 0xffffffff
jne 0x437f4c
jmp 0x437e2f
mov eax, dword [ebp - 0x18]
and eax, 0xffff
cmp eax, 0xfffe
jne 0x43811a
push dword [esi]
call fcn.0043213f
pop ecx
call fcn.00428e96
push 0x16
pop esi
mov dword [eax], esi
mov eax, esi
jmp 0x4381cf
cmp eax, 0xfeff
jne 0x438140
push ebx
push 2
push dword [esi]
call fcn.004320cd
add esp, 0xc
cmp eax, 0xffffffff
je 0x437e2f
mov byte [ebp - 2], 2
jmp 0x437f4c
push ebx
push ebx
push dword [esi]
call fcn.004320cd
add esp, 0xc
jmp 0x4380e4
movsx eax, byte [ebp - 2]
xor edi, edi
dec eax
je 0x43816e
dec eax
jne 0x437f4c
mov dword [ebp - 0x18], 0xfeff
mov dword [ebp - 0x14], 2
jmp 0x43817c
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.00431ff1
add esp, 0xc
cmp eax, 0xffffffff
je 0x4381a2
add edi, eax
cmp dword [ebp - 0x14], edi
jg 0x43817c
jmp 0x437f4c
push dword [esi]
call fcn.0043213f
pop ecx
call fcn.00428e96
mov eax, dword [eax]
mov dword [ebp - 0x20], eax
jmp 0x4381cf
mov esi, dword [esi]
mov ecx, esi
sar ecx, 5
mov ecx, dword [ecx*4 + 0x4647a0]
and esi, 0x1f
imul esi, esi, 0x38
mov dword [esi + ecx], eax
mov eax, ebx
pop edi
pop esi
pop ebx
leave
ret