diff options
| author | toni <matzeton@googlemail.com> | 2014-11-23 13:35:58 +0100 |
|---|---|---|
| committer | toni <matzeton@googlemail.com> | 2014-11-23 13:35:58 +0100 |
| commit | 4bbd82258fc358af117b45fed943b5df7a03280b (patch) | |
| tree | 3249bb076249da1d0805bd0e15ad069250dbc0f9 | |
| parent | db4092b9acd2c6041fd44f308058063f7a4ad59b (diff) | |
- xor2_decoder: xor'ing more than 1 byte (wip)
| -rw-r--r-- | crypter/xor2_decoder.asm | 17 | ||||
| -rw-r--r-- | crypter/xor_decoder.asm | 4 |
2 files changed, 18 insertions, 3 deletions
diff --git a/crypter/xor2_decoder.asm b/crypter/xor2_decoder.asm new file mode 100644 index 0000000..87c248f --- /dev/null +++ b/crypter/xor2_decoder.asm @@ -0,0 +1,17 @@ +BITS 32 + + +jmp short go +next: +pop esi +xor ecx,ecx +xor eax,eax +mov cl,0 +change: +xor byte [esi + ecx - 1],0 +dec cl +jnz change +jmp short ok +go: +call next +ok: diff --git a/crypter/xor_decoder.asm b/crypter/xor_decoder.asm index 3aa6f59..87c248f 100644 --- a/crypter/xor_decoder.asm +++ b/crypter/xor_decoder.asm @@ -8,9 +8,7 @@ xor ecx,ecx xor eax,eax mov cl,0 change: -mov byte al,0 -xor byte al,[esi + ecx - 1] - +xor byte [esi + ecx - 1],0 dec cl jnz change jmp short ok |