Bot Infestations Reach Nearly 1.2M
mengel writes "According to the folks at SecurityFocus the number of bot-infested systems has surged to nearly 1.2 million. This after a
big drop in December when lots of people replaced/upgraded
systems. Time to upgrade your spam filtering software, the onslaught is coming."
These bots could be greatly limited with proper tweaking of liability laws. Under current laws, if I leave a pool or a car unsecured and somebody else gets injured or killed, I can be found totally or partially liable. But if I leave my computer unsecured and someone else uses it to cause harm to third parties, I'm in the clear.
This must be related somehow to Windows being the most secure operating system... :p
all those Linux and OS X systems, since Symantec says Windows is the most secure operating system.
translation: Imagine a beowolf cluster of those!
being vague is almost as cool as doing that other thing...
The IP address spread is fairly simple to understand. If you have 100,000 zombie PCs with 100,000 IP addresses, then clearly you can send 100,000 pieces of spam without ever using the same IP address twice. That makes the honeypot database of greylisting useless, since I rely on waiting to see a given IP address send email to a known "bogus" email address to correctly identify that IP address as a spammer (in the short term, at least).
That isn't greylisting at all (though it is useful against spam).
Greylisting is giving a "new" incoming SMTP connection a 400-series error message the first time they try to send email to you. A 400-series error means a temporary problem - please try again. When they try a second time they try to send email, you accept.
Since all legitimate email servers will retry when they get a 400-series error, a legitimate message will go through, at a cost of a time delay.
However, most spammers don't bother retrying (although some do), so you can block a lot of spam with greylisting, with very little bandwidth or CPU cost.
In another reply I saw someone suggest ISPs sending automated snail mail notices to users who's machines have been owned.
I'll go one better. Cut the fucking thing off the net until the user fixes the problem.
I fail to see why it seems to hard to detect these things. When an ISP sees a machine go from sending out 4 or 5 emails a day to spitting out thousands of emails every hour, it should be obvious there's a problem.
Also, close the damn mail ports off. If a customer wants to host their own email server at home, fine...but make them call in and request that the port be opened. And make it clear that if their machine gets owned, they get cut off and fined before access will be reconnected.
And finally, spam has been a problem for years...how come the MTAs haven't been rewritten to not allow header forging, etc, in all that time? Isn't this supposed to be one of the big advantages of open source and open protocols?
I want a new quote. One that won't spill. One that don't cost too much. Or come in a pill.
How does one know if their computer (or relative's, etc.) is infected by a bot? Are there special diagnostic tools for that?
There are 3 things to look for.
1 Is it running Windows?
2 Is it connected to the Internet?
3 Has it been on for more than 20 minutes?
The truth shall set you free!
I run a gnu/linux based operating system, and I don't forsee that I will ever run antivirus software on it. Yes, even if people actually start writing viruses that target it.
I don't look at automated breaches of security as any special case. A security breach is a security breach. Crack attempts, spyware, adware, malware, viruses, trogans, blah blah... it's all the same problem: stopping unauthorised code running on your machine.
If my mail client has a bug that allows remote code execution, the mail client is faulty and must be patched. If my browser has a bug that allows a remote site to snatch files off my local filesystem, then my browser is faulty as must be patched. If I, FSM forbid, stupidly download and run some malicious application then I am faulty and must be "patched".
I have all non-essential services turned off, I run a firewall, I keep all my applications up to date with security patches, and I only install software from my distribution's repositry.
I don't care how much money they are making for some big security companies, these "anti-virus" applications that people are so obsessed with running on windows are just an ambulance at the bottom of the cliff.
There is something fundamentally flawed with the idea of waiting until your security has already been breached and then trying to clean up after the fact. Once it's breached that's it, game over - reformat, reinstall O/S, and replace data with last known good backup.
--Gareth