The London Stock Exchange website exposed some visitors to drive-by malware attacks today. Merely viewing the homepage at www.londonstockexchange.com (without clicking on anything) caused my Windows computer to be compromised by malware. This malware was apparently delivered through third-party advertisements which appeared on the site.
The malware was a classic spoof antivirus program which used a software vulnerability to download and install native executable code. The spoof program appeared in the system tray and prevented other processes such as Task Manager being run, falsely claiming that they were infected with a virus. The malware then tried to extort payment to fix the artificial problem it had created. It also replaced the wallpaper image with the following message:
Google's Safe Browsing diagnostic page for www.londonstockexchange.com also confirmed the presence of suspicious content on the LSE website today:
Of the 281 pages we tested on the site over the past 90 days, 65 page(s) resulted in malicious software being downloaded and installed without user consent. The last time Google visited this site was on 2011-02-27, and the last time suspicious content was found on this site was on 2011-02-27.
Malicious software includes 2 scripting exploit(s), 2 trojan(s), 1 exploit(s). Successful infection resulted in an average of 5 new process(es) on the target machine.
Accordingly, the site ended up being blocked by the Chrome and Firefox web browsers, which both make use of Google's malware blocklist.
LSE have now disabled the affected adverts from appearing on their site, thus preventing malware reaching its visitors. For clarity, the LSE website itself was not compromised. Because the malware was distributed via an advertising network, many other sites may also have been affected.
Unanimis, which hosted adverts used on the LSE website, subsequently issued the following statement:
Malware was detected on the Unanimis network which affected some advertisements on our network. Other than the banner advertisements in question, the malware does not impact or affect any other parts of a website. The affected advertisements have been removed and all sites continue to operate normally. For clarity the LSE website was not impacted by this Malware, not did it propagate malware.
Can you explain in detail how this ad trojan manages to penetrate a patched google chrome browser. Is it using any 0day exploits? Is it using a known vulnerability? Yes I appreciate the people responsible have managed to gain access to Ad servers used by major websites but that does not explain how a secure and patched browser like chrome has been torn to shreds with ease. Exploit does not appear to make use of stack code execution or heap corruption vulnerabilities, I'm very curious as to how it gets through a sandboxed browser?
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I got hit with this malware on 2/26/11 as well. What is the solution to remove it? My computer is practically useless since it took place. Is there a patch or download to fix the problem? Thanks.
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I picked this one up on Saturday 26th from the AA's routeplanner site. System restore in safe mode followed by a clean-up with Fixit Utilities seemed to do the trick.
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DeleteCan you please confirm which web browsers were susceptible to this malware? Did Chrome really not stop it and allow a PC to be infected?
ReplyDeleteRoham Lumer, chrome itself is not likely to have been exploited. From my research into this matter it appears as though it gets through using a drive by download exploit, probably a java run time exploit. many people still have an old version of JRE installed. Google are offering $20k for anyone who can break chromes security so it is not likely to have been exploited directly. Very unlikely.
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Exactly the same thing happened to me on Sunday 27th. I was on the Autotrader.co.uk site, using Firefox. I didn't click on any advert displayed on the site but still managed to get infected.
ReplyDeleteThis got me too! Sunday 27th, and i was simply going through Hotmail. I had NO suspicious mail, Just simple facebook notifications and some work email. I imagine it got through the adverts on hotmail perhaps? Anyway, I had no restore point, so had to wipe the computer and everything on it. Fortunately i'd moved my 4000+ photo's on a memory stick only a month ago!
ReplyDeleteFirefox and Ad-Block plus, saves time and for better security, e3specially for Dial-up
ReplyDeleteMy friend got hit with this on Sunday too .Start the PC up in safemode (f8) and run malwarebytes ,you might need to install it from a flash pen but it will get rid of it.Malwarebytes can be safely downloaded from cnet at download.com
ReplyDeleteI was hit by this today. I was using Chrome and had visited my Hotmail and Facebook, not clicking on anything other than a couple of messages on Hotmail. I've found 6 or 7 other people hit today all with diferent virus controls which have all been knocked out. I'm not able to use that PC yet.
ReplyDeleteWhile there are websites which check that you have the latest version of software and so on, is there a site that will actually do its best to install and execute a harmless, fully removable program using known exploits? While this won't protect against undiscovered vulnerabilities, it would be useful.
ReplyDeleteFor heaven's sakes people. If you have either Windows 7 Pro or Windows 7 Ultimate (great for shifting from English to French), run Windows as a virtual most of the time. If you are using XP, at least use Microsoft's DropMyRights for your Internet facing apps):
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Given the fact that Chrome is already sand-boxed (but I do run Chrome started with DropMyRights on XP) this may not help here. But the filters that I have that work in all browsers blocked all but one ad-server host at all the sites listed:
http://hostsfile.org
http://securemecca.com
Firefox of course has AdBlockPlus, and Chrome also has an AdBlock plugin of its own. I am adding the lone host I didn'g block and expanding one of the IP rules in the PAC filter to cover it and any others in that range. There is one big difference between what I have (the PAC filter) and these other filters. I have an anti-malware priority as well and because of it do not block as many of the ads in the PAC filter and instead use the blocking hosts file to take up the slack. But ABP is superior in blocking ads with either the EasyList + EasyPrivacy or FanBoy-AdBlock + Fanboy-Tracking subscriptions. Blocking malware is a higher priority than blocking ads for me.
so i try to use the F8 button to do a system restore in safe mode but the f8 button does nothing; will it have affected that too?
ReplyDeleteTo remove the Malware, follow this sequence:
ReplyDelete• Start computer IN SAFE MODE (press and hold F8 during start up) →
• Follow instructions to “open in SAFE MODE”
• Ensure “SAFE MODE” appears in blue in bottom LH corner of screen.
• When your desk top appears →
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• Go to Folder options
• Go to “View” tab
• Tick or spot “show hidden files/folders” (from “do not show etc)
• If any warnings appear just press yes/O.K. etc.
• Untick “hide protected files/folders extensions etc”
• Tick “show protected files, extensions etc”
• Click Apply
• Press O.K to close that box
• Double click to Open “c “drive
• Go to Documents and settings
• Go to All users
• Go to Application data
• FIND THE FILE (mine was around 12 numbers/letters in upper and lower case. If you are not certain which file it is, copy and paste the suspected one to desktop and open it.
• Delete the file.
• Restart in normal mode
• If all is O.K. go to “my computer” an follow the sequence (from 2 above) to re-tick and re-spot the correct / recommended boxes
• download and install free version of “malwarebytes”
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My father got hit with this one over last weekend, and it took me the best bit of 4 hours to remove it.
ReplyDeleteHe was using Firefox, without AdBlock Plus and he hadn't updated his anti-virus in weeks, despite my warnings.
To remove it I followed this guide here: http://www.bleepingcomputer.com/virus-removal/remove-system-tool
The registry key you find may be slightly different from the one in the guide, but the format is the same. Once the registry key is removed with Hijackthis it stops the malware starting with Windows, reinstates your own anti-virus and allows you to install Malwarebytes Anti-Malware to remove it.
"so i try to use the F8 button to do a system restore in safe mode but the f8 button does nothing; will it have affected that too? "
ReplyDeleteIt's unlikely to have been affected. If you haven't used F8 boot before, be aware that you have to press the key at the right moment while booting. The easiest way is simply to tap the F8 key continuously during boot.
So I did as anonymous 3rd march suggests and sure enough F8 worked this time; got to do a system restore in safe mode and problem sorted; thanks for the help.
ReplyDeleteI got hit by this one from being on facebook. It's my work laptop so silver lining and all that :o)
ReplyDeleteHi. Windows user here. I'm considering switching to Ubuntu Linux. Please tell me can I get infected with this malware on Linux? Thanks.
ReplyDeleteI picked this one up on Saturday 26th from the AA's routeplanner site. System restore in safe mode followed by a clean-up with Fixit Utilities seemed to do the trick.
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Different infections, for example, worms can move rapidly, and may make it hard for hostile to infection programming without anyone else to be viable. To build infection insurance, you can include things, for example, firewalls, spyware shields and programmed overhauls to expand your security.http://how-to-remove.org/malware/
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