Breaking Sec

Crypters explanation for beginners

What is a crypter?
A crypter is a program used to make viruses undetectable by anti-viruses.

Crypter types:

Runtime: Crypters that crypt your virus and when you run it in a computer it is undetectable by the anti-virus.

Scantime: Crypters that crypt your virus and when you scan it it is undetectable but when your run it in a computer the anti-virus detects it.

Crypter parts:

• Client: The porgram where you can load your file and crypt it.
• Stub: Stub is a filter for the file you chose at the client. If you delete it the client is useless but some crypters don't have a stub.exe (internal stub).

FUD & UD

UD means UnDetectable.
FUD means Fully UnDetectable.
You can check if your crypted virus is FUD or UD at NoVirusThanks.

http://scanner.novirusthanks.org/



Always check "Do not distribute the sample"!

If your virus is FUD it will be like this:

Have you made any crypters of your own?

no :)

This is more of an explanation then a guide...

ok thread edited :)

crypter is more well-known in the security community as a "packager" just for anyone who doesnt know.

(08-27-2010 03:35 PM)Crypt0s Wrote: [ -> ]crypter is more well-known in the security community as a "packager" just for anyone who doesnt know.

I didn't know that. Thanks :)