Slashdot Mirror
Researchers Take Down a Spam Botnet
The Register is reporting on the takedown of a botnet once responsible for 1/3 of the world's spam. The deed was done by researchers from the security firm FireEye, who detailed the action in a series of blog posts. PC World's coverage estimates that lately the botnet has accounted for 4% of spam. From the Register: "After carefully analyzing the machinations of the massive botnet, alternately known as Mega-D and Ozdok, the FireEye employees last week launched a coordinated blitz on dozens of its command and control channels. ... Almost immediately, the spam stopped, according to M86 Security blog. ... The body blow is good news to ISPs that are forced to choke on the torrent of spam sent out by the pesky botnet. But because many email servers already deployed blacklists that filtered emails sent from IP addresses known to be used by Ozdok, end users may not notice much of a change. ... With [the] head chopped off of Ozdok, more than 264,000 IP addresses were found reporting to sinkholes under FireEye's control..."
Well... first you have to find their command and control channels. Then you have to figure out how they work. Many times the command and control is both distributed and encrypted so it is very hard to "chop the head off"
It'd be a great project, though you do want to be careful, some of these viri are designed to do harm if disabled improperly, and some of these computers could be in situations where their failure could cause the loss of lives.
Again, not saying don't do it...saying do it carefully.
93rd rule of Slashdot: No matter how obvious my sarcasm is, my comment will be taken seriously by someone.
Another botnet is on the verge of picking up a good number of those systems. Within a very short while we'll see the spam levels right back where they were before. Anti-botnet activities are good when done in the name of anti-botnet activity, but they are weak efforts in the name of stopping spam. The way to stop spam is to fight it as the economic problem that it is; if people continue to go after the symptoms of spam like this they will continue to find themselves quickly thwarted.
Damn_registrars has no butt-hole. Damn_registrars has no use for a butt-hole.
Comment removed based on user account deletion
you are suggesting that someone hooked up a life critical system to the public internet? That in itself should be a felony.
"We returned the General to El Salvador, or maybe Guatemala, it's difficult to tell from 10,000 feet"
Right...because the botnet was measured to be producing precisely 1/3 of the world's spam. I suspect that the original estimate was sufficiently inaccurate that more than one significant figure would not really be justified, let alone an exact value.
So if this is the future...where's my jet pack?
From reading all the FireEye blog posts on the operation, I can't find any point where they broke the law or even behaved in a way that violated anybody's rights.
What they did was to coordinate things so that ISPs and domain registrars followed existing procedures to shut down sites and revoke domain names. They also found some domain names that were programmed to be used as fallbacks but had not yet been registered, then registered those.
It looks like at no time did they actually hack anybody or penetrate computers, either innocent bystanders or guilty people, nor did they use the botnet themselves, so there's no legal or ethical problem here -- assuming their reports are complete and correct, obviously.
We really need an analysis done and report made to the public security community. This is a unique chance to discover what are the real vulnerabilities to the mass of computing power on which criminals prey.
A federal or state level court needs to authorize the researchers to do such an analysis. Even a single state would be enough, if the zombie IPs can be reliably mapped to that state. I would envision the analysis to include:
- Make a full study of many individual zombie PCs: What antivirus, firewall, OS, applications, etc. are installed, including version numbers and a fingerprint (to identify whether they are super-vulnerable copies from warez sites, infected OEMs, etc.).
- Monitor usage of a small number of PCs to identify what user habits lead to zombification, based on the theory that these PCs will become zombies of another botnet soon probably. What should be monitored, and for how long?
- Contact (with law enforcement assistance) a small number of individual users to interview them. Publish anonymized interviews for representative cases so the public can better learn what constitutes dangerous habits.
- Report anonymized individual representative cases, trends and statistics.
Discuss whether the defanged botnet should be used to destroy other botnets. Too much discussion would alert the other net owners. People could opt in based on a message sent to infected PCs, if the authorities support it, but unless those bots are hardened they might open the owners to retaliatory attacks.
At least, let's find out if antivirus really doesn't work, what habits led to botnet creation, and how can we alert zombie owners so they adopt more secure practices.
How much of it actually passes an integrity/authorization check like dkim or spf?
Maybe if those were made more widespread we could do a good bit better job tracing and jailing these bastards... ...or blacklisting accomplice ISPs that don't give a rat's arse about the spam they are sending.
Forgery allows spammers to operate anonymously.
Why is some obscure security firm doing the job that governments should have done 10 years ago?
Exactly we hear about "researchers" even broadcasters doing this. But never about regular law enforcement...
Governments don't appear interested it dealing with this. Probably because it isn't the (alleged) profits of the entertainments industry being affected.