Reverse Engineering for Beginners

CHAPTER 49. INCORRECTLY DISASSEMBLED CODE CHAPTER 49. INCORRECTLY DISASSEMBLED CODE

pop ecx

das

hlt

pop edx

out 0B0h, al

lodsb

push ebx

cdq

out dx, al

sub al, 0Ah

sti

outsd

add dword ptr [edx], 96FCBE4Bh

and eax, 0E537EE4Fh

inc esp

stosd

cdq

push ecx

in al, 0CBh

mov ds:0D114C45Ch, al

mov esi, 659D1985h

Listing 49.2: random noise (x86-64)

lea esi, [rax+rdx*4+43558D29h]

loc_AF3: ; CODE XREF: seg000:0000000000000B46
rcl byte ptr [rsi+rax*8+29BB423Ah], 1
lea ecx, cs:0FFFFFFFFB2A6780Fh
mov al, 96h
mov ah, 0CEh
push rsp
lods byte ptr [esi]

db 2Fh ; /

pop rsp

db 64h

retf 0E993h

cmp ah, [rax+4Ah]

movzx rsi, dword ptr [rbp-25h]

push 4Ah

movzx rdi, dword ptr [rdi+rdx*8]

db 9Ah

rcr byte ptr [rax+1Dh], cl

lodsd

xor [rbp+6CF20173h], edx

xor [rbp+66F8B593h], edx

push rbx

sbb ch, [rbx-0Fh]

stosd

int 87h

db 46h, 4Ch

out 33h, rax

xchg eax, ebp

test ecx, ebp

movsd

leave

push rsp

db 16h

xchg eax, esi

pop rdi

loc_B3D: ; CODE XREF: seg000:0000000000000B5F