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2 votes
1 answer
1k views

Why don't anti-viruses detect encrypted viruses in decryption?

Some viruses are encrypted so that the anti-virus can't identify them, but what I don't understand is: why wouldn't the anti-virus detect them, considering they have to decrypt themselves before ...
GemDev's user avatar
  • 21
1 vote
2 answers
609 views

How could an AV detect a virus that has a chance of not decrypting itself?

If I understand this correctly there is a chance the virus may not decrypt itself at all. How could an AV catch this? In some cases, the decryptor may start with a header whose intent is not ...
Celeritas's user avatar
  • 10.2k
24 votes
3 answers
8k views

How does a crypter for bypassing antivirus detection work?

I am talking about crypters used to encrypt files like viruses and keyloggers for the sole purpose of bypassing antivirus detection. How do they work?
gbr's user avatar
  • 2,020