Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!sdd.hp.com!ucsd!rutgers!netnews.upenn.edu!vax1.cc.lehigh.edu!cert.sei.cmu.edu!krvw From: CHESS@YKTVMV.BITNET (David.M.Chess) Newsgroups: comp.virus Subject: Re: How safe are FTP sites from viruses? (PC) Message-ID: <0007.9012041357.AA13652@ubu.cert.sei.cmu.edu> Date: 30 Nov 90 14:38:24 GMT Sender: Virus Discussion List Lines: 18 Approved: krvw@sei.cmu.edu Patrick Ryan : > Are you SURE? I would disagree... the lab in our building has Stoned > infections occurring very frequently, and not all of them are due to > people booting from infected disks. If that WERE the case, how would > it spread to a floppy from hard drive? Every Stoned virus that I've ever seen infects only when a machine is booted from an infected diskette or hard disk. When a machine with a hard disk is booted from an infected floppy, the virus infects the hard disk and loads itself into memory; when a machine is booted from an infected hard disk, it just loads into memory. While the virus is in memory, it will infect any diskette used in Drive A: (roughly). It is of course possible that someone's written a Trojan Horse (or even a virus) that lives in an EXE or COM file, and installs the Stoned virus on hard disks under some circumstances. I've never seen such a program, though... DC Brought to you by Super Global Mega Corp .com