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Clever New Windows Worm
freakboy303 sent in linkage to a new worm
that will no doubt be cluttering our inboxes soon. Clever bits include running its own SMTP
service to increase chance of success, as well as using a bunch of spaces
to disguise the true extension of the executable. No doubt countless copycats
will soon follow and our inboxes will be cluttered by countless copies
of the thing. Not that there's a problem with windows security.
Windows is so easy to write worms for that we see a constant influx of simple stuff. Simple VB scripts, etc., can do a great deal of damage, and worm authors don't seem motivated to try a harder because they don't have to. This new worm seems like a step in a scary direction, towards real sophistication. Depending on system services to propagate will not be easy forever, and I expect to see more worms with their own protocols (like SMTP) built-in.
The "optimal" worm is one in which all it needs is a thread of execution and access to basic OS APIs like sockets and elementary file access. You're not going to stop a worm from calling the most basic APIs, so the key to stopping worms (once all the fundamental holes are patched in Windows, if ever) seems to be not letting them have that thread of execution in the first place. Of course, there will always be lots of users willing to run unknown executables, but the less automatic, the better. Patching buffer overflows in IIS, etc., will only go so far because there will always be users ready and willing to execute email attachments. Until focus comes to bear on ways to keep unsophisticated users from doing this sort of thing, there will always be a cornucopia of devastating worms.
See here for a discussion on the experiments of a particular fellow on finding a list of offending Windows extensions that are not unhidden even if "Show all extensions" is used.
Why are companies letting people thrash the mail system inadvertantly and go on like nothing happened? This is a social problem, albeit one that has been made more prevalent by bad technology. So what if Outlook took out the double-click-run-and-destroy feature for attachments? Trojan's would get mailed along w/ instructions on how to safe to your disk and run the program. And some idiot would do it too.
I'd much rather see corporations making their employees responsible for breaking things on the network. If the admin fscks up the entire system he'd be up to his knees in shit -- but the "users" are allowed to do it because they can claim ignorance? No thanks. Draw up some strick hard-line rules for your employees and get this crap taken care of. My personal suggestions would be:
Sure, it's a bit drastic. But is productivity really benefiting from wreckless use/abuse of insecure software? Must your employees use Outlook so they get that warm fuzzy feeling of being able to fiddle with all sorts of buttons on their screen? Why can't the computer be viewed like another other tool? If you don't know how to use it why in the world are you using it at work? I wouldn't dream of putting joe-schmoe on a fork life w/out some training, why put people w/ no training on a computer? If joe-schmoe runs the fork-lift into a wall you bet he'll get some heat for it. Run a virus though? Nah, everybody does that.. let it slide, let IT clean it up.
You've never done corporate IT support, have you? Even if you could convince the pointy-haired bosses to accept these draconian security restrictions, the employees would attempt lynch you for it. Business people don't like being told what they CAN'T do! They aren't like apthetic college students, who usually care less about the rules (unless it affects their precious beer supply).
If a manager (Or a sales guy, or an accountant, whatever) is used to using IE at home and sending e-mails with pretty fonts and pictures attached, they'll demand that they can do it at work. They'll want to be able to read Word attachments from outside sources, and share files with their co-workers. If you say no, they'll just keep complaining louder to your manager and your manager's managers until someone forces you to cave in to their demands. Most of your changes will get shot down, and you'll put up with a lot of grief in the process.
Most users don't give a rats ass about security, they just want to be able to do their jobs as quickly and easily as possible. If you try to get in their way, they'll fight you on every change until you get frustrated and give up.
That's why it's important to make SMALL security improvements, and make them slowly. Start by blocking certain attachments on the server side, and continously remind people not to click on unknown files. Make sure that your virus software runs automatic scans, and updates itself automatically. The users aren't going to do it for themselves, or at least not until they are already infected. Warn constantly, but never try to FORCE anything on your users unless it's absolutely necessary. The nastier you get, the more that they'll start ignoring you.