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Mystery Malware Affecting Linux/Apache Web Servers
lisah writes "Reports are beginning to surface that some Web servers running Linux and Apache are unwittingly infecting thousands of computers, exploiting vulnerabilities in QuickTime, Yahoo! Messenger, and Windows. One way to tell if your machine is infected is if you're unable to create a directory name beginning with a numeral. Since details are still sketchy, the best advice right now is to take proactive steps to secure your servers. 'We asked the Apache Software Foundation if it had any advice on how to detect the rootkit or cleanse a server when it's found. According to Mark Cox of the Apache security team, "Whilst details are thin as to how the attackers gained root access to the compromised servers, we currently have no evidence that this is due to an unfixed vulnerability in the Apache HTTP Server." We sent a similar query to Red Hat, the largest vendor of Linux, but all its security team could tell us was that "At this point in time we have not had access to any affected machines and therefore cannot give guidance on which tools would reliably detect the rootkit."'"
This is why serious businesses choose a serious web server: Microsoft Internet Information Services running on Microsoft Windows Server.
"the current thinking is that the malware authors gained access to the servers using stolen root passwords"
so basically its most likely they used the traditional means of gaining access (not through holes, but merely through bad personal security practices regarding passwords and password management). And it only affects windows clients. So how is this problem not your typical someone cracked your machine? Oh wait, I smell Microsoft FUD... ewwwwww
Last night I discovered a directory named 53 4B 59 4E 45 54 in my home folder.
According to the story (did you read it), it appears to be a situation where the root password has been compromised, not the applications or operating system.
Problems with IIS were as a result of vulns in the application and/or Windows operating system - totally different problem.
Would you blame a lock company if the user left his keys in the lock?
Ed
I can see thousand of people trying to make numeric directories :)
Yes, also if you can run your tummy while patting your head you aren't infected also.
I think.... this crazy idea is the virus!
IIS are serious server. This are serious thread.
In Xanadu did Kubla Khan
A stately pleasure dome decree
Does this rootkit work on a hardened Gentoo install with no LKM support on SPARC64? :P
Maybe; they're still compiling it.
Yes, but you have to compile it.
I read it, here's what it said: "One great unknown thus far is how the servers come to be infected. Absent any forensic evidence of break-ins, the current thinking is that the malware authors gained access to the servers using stolen root passwords."
In other words, they have no idea how the servers were compromised. Because they can't find out how, they're guessing it was a root password that was stolen. In other words, its still just as likely a flaw in some software.
To figure out what the compromise vector is, it's probably going to be necessary to figure out what the compromised servers have in common -- and how that differs from uncompromised servers. (Keeping in mind that currently-uncompromised servers may have the same vulnerability, and that attackers or their software just may not have gotten to them yet.)
I'd suggest enumerating factors such as OS, OS version, remote access methods (ssh, ftp, etc.), Apache versions, Apache modules, add-ons like CPanel, network/ASN, and so on -- anything could be a culprit at this point.
And that includes things that have nothing to do with Linux or Apache: for example, it's possible that the attackers acquired root passwords by infecting Windows systems used by administrators -- then just waited for them to initiate ssh sessions to their servers. It'd probably be best to leave all possibilities open and consider them equally likely until evidence starts accumulating in favor of/against them. (In re-reading that last statement, I suppose it sounds a bit trite. I'm just trying to discourage premature conclusions that anything is at fault until somebody can produce evidence to support saying so.)
The Register has been on this for a while and although the story is older it is better written and has more interesting details: http://www.channelregister.co.uk/2008/01/16/mysterious_web_infection_continues/
my $.02 of course
I see this type of attack all the time, the fact that someone automated it and gave it a zombie machine is not surprising.
* Don't allow root to ssh into your machine.
* Disable ssh1.
* Limit sudoers.
* Have good passwords.
* ???
* PROFIT!!
Seems like a formula everyone should know.
I said no... but I missed and it came out yes.
"they're guessing it was a root password that was stolen"
A pretty good guess, otherwise we could expect to see millions of Apache web servers compromised (there are over 75 million Apache web servers in active service) and anticipate a much greater number of Windows clients infected.
The significance of this story is not that Windows clients are the target, the significance is that the infecting agent is originating from Apache/Linux servers.
Ed
I do not know how you interpret this, but a rooted server, Linux, FreeBSD, OpenBSD or even Windows is also a "harmed" computer. Yes, clients will get infected, but the servers are in deep trouble too.
Ahhh...the great dumpster continuum. Many a free computer will be found there. -- sowth (748135)
Depends. How good is my lawyer?
The last time I wrote code, it was Morse
Your safe. NOTHING will run on that system. ;-)
Flexible bare-metal recovery for Linux/UNIX
It's high time for better software, and the only way to get that is to apply market pressure. Software liability is the answer.
... And you wonder why your post was modded flaimbait?
1) If the market really wanted extensive 'software liability' then we'd already have it. Customers would demand it, suppliers would figure out how much it would cost to provide it, and prices would sort themselves out. Turns out the prices go WAY up, and customers (most of them) don't want to pay them.
2) What happens to Linux in a world with mandatory software liability? Who is liable? The company providing install and support? The volunteer contributor who wrote that line of code? The project maintainer who accepted the patch?
Yeah. People should be held liable when they know full well that Microsoft has a track record for bad security, but choose Microsoft products anyway.
http://outcampaign.org/
Microsoft? This story is on posted on linux.com and being hyped on a OSDN site, where do microsoft come in? They must have a pretty deep mole to get this one planted...
... though a solution has not been yet:
http://blog.trendmicro.com/e-commerce-sites-invaded/
If you happen to have one of these compromised systems, I am sure that Trend would like to talk to you about it...
There is something suspicious about this report. Some things can't happen the way people say they happen, and when that is the case we have to look at more likely scenarios.
I would bet the path of the TCP/IP packets route through compromised providers who have an injection strategy. Remember a few months ago how IPSs were injecting their own java script and ads into the pages of other sites?
http://ars.userfriendly.org/cartoons/?id=20070703
This is the most likely scenario I can think of.
Software has to suck because the market can't afford software that doesn't suck. Kids out of high school and collage or fresh out of joe's web school. aren't qualified to write good software, yet this is what companies hire over more experienced people.
Even then, there is no ability to develop your skills because you spend 99% of your time learning new environments.
Software is HUGELY complex these days and it takes a log of study, knowledge, and skill to be any good at it. Companies don't want to hear that. They want to increase productivity by "KLOC." (Un)fortunately, there is a lot of "art" and "creativity" in software development and without well defined product specs, rigid test plans, and quality assurance which adds delays and cost to a project you won't get better code.
Standard business upside potential vs downside risk. Upside potential: first to market, profit!!! Downside risk: blame some hacker.
What's this nonsense? Ubuntu is Ubuntu. ...and that's kinda related to Mac, right? Just... more browner.
happy geek has run out of happy :-(
455fe10422ca29c4933f95052b792ab2
His main point was insightful. There are two parts to the story - one, Linux servers running Apache have been compromised. Two, these servers are infecting Windows clients through vulnerabilities in those clients. This exploit does not affect non-Windows computers.
If the current thinking is indeed that the Linux servers were inappropriately accessed through stolen passwords, how is that a security flaw of Linux or Apache? Like he asked, how is using a legitimate password equal to cracking the server?
On the other hand, turning Windows clients into bots *IS* an example of that software's (and QuickTime's and Yahoo! Messenger's) insecurity and vulnerability!
The real "Libtards" are the Libertarians!
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