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Over 9,000 PCs In Australia Infected By TorrentLocker Ransomware

First time accepted submitter River Tam writes Cybercriminals behind the TorrenLocker malware may have earned as much as $585,000 over several months from 39,000 PC infections worldwide, of which over 9,000 were from Australia. If you're a Windows user in Australia who's had their files encrypted by hackers after visiting a bogus Australia Post website, chances are you were infected by TorrentLocker and may have contributed to the tens of thousands of dollars likely to have come from Australia due to this digital shakedown racket.

22 of 83 comments (clear)

  1. It's Over 9000! by dillee1 · · Score: 4, Funny
  2. Re:How? by Anonymous Coward · · Score: 5, Informative

    I was wondering too, it's in the article "The main way that PCs become infected is by spam email that encourages the victim to open what appears to be a document but is in fact an executable file that will install the malware and encrypt the files. In other words, it relies on social engineering rather than exploiting an un-patched bug. In some cases, the malware is delivered within a .zip file while in others, the message contains a link to the .zip file."

  3. Re:How? by KiloByte · · Score: 5, Insightful

    This malware relies on weakness in wetware rather than software. No general-purpose operating system can save you from PEBKAC issues, at most partially mitigate them. Unix-style execute bit rather than Windows' extensions reduces the number of vulnerable idiots by like 2-3 orders of magnitude, but you can bet that if the webpage kindly provides instructions, a good number of marks will still manage to get infected.

    --
    The creatures outside looked from Alt-Right to Antifa; but already it was impossible to say which was which.
  4. Re:How? by Cramer · · Score: 2

    ... except when your application(s) and OS hide file extensions making it difficult for people to see it's an "exe".

    (But yes, people are dumb.)

  5. Backups solve much of the problem: by Hartree · · Score: 4, Insightful

    As computer files become more valuable to ordinary people (rather than just IT geeks and businesses), backup plans become more important.

    Most general users don't do this, but as the data becomes more damaging if it's lost, encrypted or maliciously destroyed, they may need some sort of solution.

    Even a pretty sophisticated ransom-ware would have a hard time if you take an occasional backup and check it by restoring/reading the file on another machine.

    1. Re:Backups solve much of the problem: by Anonymous Coward · · Score: 3, Interesting

      Word.

      Posting Anon because I'm embarressed, but our business got hit hard by a rootkit two weeks ago (not TorrentLocker). Proved damn near impossible to get rid of.

      In the end we erased the physical desktops and rolled all the VM's back to our August DR backup. Fortunately all our work is done in VM's and we backed up data offsite religiously (with version histories).

      So we had a shitty virus protection policy but were saved by good backups.

      We now have WebRoot rolled out via group policy, firewalls, windows update and defender are enforced by same. I've added a task to randomly picking a VM to boot scan via a KAS rescue disk once a week.

  6. Sandbox before browsing by ITRambo · · Score: 2, Interesting

    We install Sandboxie on all computers that are in for service. The benefits of using it are explained to the customer. A rogue website only takes over the sandboxed session. If infected, close the box, delete the contents and you're up and running again. I do not comprehend why the "partial" sandbox of existing browsers is considered to offer protection. Full sandboxing is the only way to do so. Nothing short of a full sandbox is safe. The sandbox in 360 Total Security looks promising also. But, it needs to be selected from the right mouse click menu, when clicking on the browser icon. My experience is that people get lax and won't do this all the time. Of course, if someone uses a cloud backup service, like Carbonite, they can clean the viruses on the PC and then restore their files as long as their cloud files are not encrypted also.

    1. Re:Sandbox before browsing by mjwx · · Score: 2

      We install Sandboxie on all computers that are in for service. The benefits of using it are explained to the customer. A rogue website only takes over the sandboxed session. If infected, close the box, delete the contents and you're up and running again.

      That's completely useless in this case as the malware fools the user into installing it. The user downloads a zip file containing an executable, so its well outside the sandbox by that point.

      --
      Calling someone a "hater" only means you can not rationally rebut their argument.
    2. Re:Sandbox before browsing by Le+Marteau · · Score: 4, Informative

      > I'm running a browser in a VM... What malware?

      Your faith in the security of VM sandboxes is misplaced.

      It is trivial to write a program which can detect if it is in a VM. And then, attack the hypervisor and escape the protected environment. As virtualization has become more common, such malware has gone from academic exercises to real-world exploits.

      http://www.symantec.com/avcent...

      My favorite line:

      Finally, the most interesting attack that malicious code can perform against a virtual machine emulator is to escape from its protected environment.

      With virtualization becoming more and more common

      --
      Mod down people who tell people how to mod in their sigs
  7. Re:How? by rtb61 · · Score: 2

    You missed out one bit, the critical part, the ability to get away with the crime, bitcoins seem to have found their true market, criminal enterprise. Interesting side note the same countries were targeted each time and a very unlikely set, it would seem the logical relationship between the perpetrators in each targeted location would be a family relationship. There really isn't all that much secrecy in bit coins like anything else digitally transmitted across the internet bit coins have a recognisable bitmap and there movement can be readily traced.

    --
    Chaos - everything, everywhere, everywhen
  8. Re:I can't believe people would fall for this! by deek · · Score: 5, Funny

    Yeah, like I'm going to click on that link you posted! Can't fool me.

  9. Re:How? by thegarbz · · Score: 4, Interesting

    You don't need to hide the .exe extension. People will click on it anyway if they believe they have something to gain or something to lose.

  10. Re:How? by tlhIngan · · Score: 5, Informative

    This malware relies on weakness in wetware rather than software. No general-purpose operating system can save you from PEBKAC issues, at most partially mitigate them. Unix-style execute bit rather than Windows' extensions reduces the number of vulnerable idiots by like 2-3 orders of magnitude, but you can bet that if the webpage kindly provides instructions, a good number of marks will still manage to get infected.

    It's really just another form of Dancing Pigs social engineering attack. You give the user a plausible reason for downloading and installing software, and you'll find users go out of t heir way to install it.

    Doesn't matter the OS. And it can be anything - be it porn, a "private porn browser" or other such tool and any OS is vulnerable. (Yes, "private porn browser" - download now and browse your porn in privacy and even your wife won't find out...).

  11. Re:How? by Anonymous Coward · · Score: 4, Interesting

    I've received dozens of these. All via hijacked SMTP hosts.

    The interesting thing is that all are plain-text with the attachment. The attachment is only few kilobytes long. No HTML, no javascript, nothing. Even more telling was that they came in batches of about 5. I'd start my day with about 5 in my inbox that all arrived within few minutes of each other; all pretty-much the same. Then nothing all day until the next morning when the same thing happened.

    They appear plausible, except the most recent one was "We noticed you haven't collected your tax refund of $few thousand." That's interesting because, in Australia, the ATO sends you a cheque or direct-deposits into your account for you. You don't collect anything. I've had parcel tracking ones, and all manner of other variations. There was one claiming to be a building approval. A "vehicle tax rebate" form. Then a "late fee" for something, etc.

    A few years ago I would have expected them to contain some malicious HTML or javascript,to try and force the attachment to execute in outlook. I guess these days most clueless n00bs are using web based mail, which would make that a little more difficult.

    It's crap like this that makes me glad I gave my (technology) clueless mother a Linux machine with all the security bells and whistles enabled. I'm sure she got more than her share of these emails, which she can try to run to her heart's content. I'm even more sure that she is the reason I got them (forwarding my mails, or sending mails To: a hundred people).

  12. Not as such by dbIII · · Score: 2

    Just clicking on a link should never be enough not matter what you think the "weakness in wetware" is.

  13. Re:Why single out Australia? by dwywit · · Score: 3, Interesting

    We care about you, too. Seriously - the support from other countries during the recent tragedy in Sydney is very much appreciated.

    --
    They sentenced me to twenty years of boredom
  14. Company I work for got hit... by felixrising · · Score: 4, Interesting

    We had two employees access the torrentlocker website, right through out proxy portal with Kaspersky and McAfee running, and they downloaded it to their PCs running McAfee and then ran the bloody thing. By the next morning, we had more than 50000 files encrypted. I spent the next two days scripting deletion and restores across several multi-terabyte file shares. What I REALLY don't get is, why the heck did a known piece of malware like that make it through all of those antivirus/antimalware systems and heuristics and succeed in ruining two perfectly good days? (just ignoring all of the staff downtime).... Anybody?

    1. Re:Company I work for got hit... by BitZtream · · Score: 3, Interesting

      Because anyone who has been in IT for any length of time knows McAfee is complete shit? Proxies trying to stop the spread of things distributed by sites that bust their ass to avoid being caught by a blocking proxy?

      I.E. If you DEPEND on anything from a 'security' company like McAfee, Kaspersky, F-secure, whoever ... you've already failed. Those are backups that hopefully help to catch the things that the user didn't.

      Your first and only REAL line of defense is the user and proper administration like only letting people access files they NEED to access.

      --
      Persistent Volume manager for Kubernetes - https://github.com/dwimsey/openshift-pvmanager
  15. Interesting note about cryptoviruses by wbr1 · · Score: 4, Informative
    Most are rather dumb. They will encrypt standard file types such as jpg and doc, but leave really critical stuff (qbw, pst, etc) alone. I guess the writers, not knowing what files being encrypted in a user profile might brick a machine only go for easy targets. They will readily encrypt any attached drive as well, following the same ruleset. If your backup program stores in a standard .zip or in the clear, it will be encrypted too. The best safety net is an online backup that does versioning so you can roll back to pre-infection versions of files.

    One last note, in about 5%-10% of the cases I have worked on, I was able to recover files from VSS. Most of these variants attempt to disable VSS and delete the shadow copies, but they either are not successful or do it slowly. Yanking the drive from the running environment and looking at it with shadow explorer on a clean box can sometimes save some data. Here in the US Cryptorbit variants seem to be the most frequent I see (cryptodefense, cryptolocker, howdecrypt, etc). They have really exploded in the past month. A recent fake ADP email that was making it through spam filters was responsible for a lot. The linked site downloaded a zip containing an exe with an adobe pdf icon. If you have a suspect exe, see if it has been analyzed n malwr.com and you can get a good breakdown of its precise behavior.

    --
    Silence is a state of mime.
  16. Re:How? by sjames · · Score: 2

    And still, MS won't make opening something and running something distinctly different actions.

  17. Re:What kind of statement is this by Neil+Boekend · · Score: 2

    In my experience: not really. They just have virusses and don't know it.
    Most users still don't backup. They just don't think about it.

    --
    Well, I might have a way, but it only works on a semi spherical planet in a vacuum.
  18. Re:How? by jedidiah · · Score: 2

    > I've received dozens of these. All via hijacked SMTP hosts.

    Any time I see one of these I examine the headers and invariably it is some end user desktop running off of a dynamic IP from some ISP.

    --
    A Pirate and a Puritan look the same on a balance sheet.