[sp332]

Don't run this, just put it in a .txt file and run a virus scanner on it:

  X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*

OK, it's actually harmless, but it's the only pure-ASCII executable I've ever seen, which is pretty cool.

[wendroid]

see also http://news.ycombinator.com/item?id=1381127

[sp332]

I think http://mirror.href.com/thestarman/asm/eicar/eicarcom.html is a better link for that

[wendroid]

Interesting read but

> That it be a normal DOS program capable of producing the same results under WINDOWS as well as real DOS mode.

so it's pretty useless to me