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Adblockers Installed 300,000 Times Are Malicious and Should Be Removed Now (arstechnica.com) 33

An anonymous reader quotes a report from Ars Technica: Adblocking extensions with more than 300,000 active users have been surreptitiously uploading user browsing data and tampering with users' social media accounts thanks to malware its new owner introduced a few weeks ago, according to technical analyses and posts on Github. Hugo Xu, developer of the Nano Adblocker and Nano Defender extensions, said 17 days ago that he no longer had the time to maintain the project and had sold the rights to the versions available in Google's Chrome Web Store. Xu told me that Nano Adblocker and Nano Defender, which often are installed together, have about 300,000 installations total.

Four days ago, Raymond Hill, maker of the uBlock Origin extension upon which Nano Adblocker is based, revealed that the new developers had rolled out updates that added malicious code. The first thing Hill noticed the new extension doing was checking if the user had opened the developer console. If it was opened, the extension sent a file titled "report" to a server at https://def.dev-nano.com/. "In simple words, the extension remotely checks whether you are using the extension dev tools -- which is what you would do if you wanted to find out what the extension is doing," he wrote. The most obvious change end users noticed was that infected browsers were automatically issuing likes for large numbers of Instagram posts, with no input from users. Cyril Gorlla, an artificial intelligence and machine learning researcher at the University of California in San Diego, told me that his browser liked more than 200 images from an Instagram account that didn't follow anyone. The screenshot to the right shows some of the photos involved.

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Adblockers Installed 300,000 Times Are Malicious and Should Be Removed Now

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  • by raymorris ( 2726007 ) on Tuesday October 20, 2020 @06:10PM (#60629614) Journal

    > If it was opened, the extension sent a file titled "report" to a server at https://def.dev-nano.com/ [dev-nano.com].

    These guys suck at malware. When you know an analyst is watching the malware is supposed to ... do nothing. Don't intentionally do suspicious shit when you know the good guys are looking.

  • ... the extension sent a file titled "report" to a server at https://def.dev-nano.com/ [dev-nano.com].

    I can't browse that URL because it's blocked by uMatrix. :-)

    [ I have both uMatrix and uBlock Origin install in Firefox. ]

    • Although now that uMatrix has ended active development [slashdot.org], it seems like only a matter of time until some security bug comes to light and it ends up becoming a liability, security-wise. I hope he picks it up again, but I'm not confident (uBlock Origin exists because he got tired of uBlock, gave it up, then resumed it later under a new name).
  • by OverlordQ ( 264228 ) on Tuesday October 20, 2020 @06:30PM (#60629648) Journal

    They could have forked the open source code. They wanted to buy the users.

    • I know, Slashdot isn't legit either. I mean Bizx could also have forked the code but instead bought the site from Dice.

      No legitimate entity would ever pay money for established IP right?

  • In situations like this, I am immediately reminded of the sage response [youtube.com] by M. Laughington Baggus.

    He is truly a voice of our times.

  • Extensions should not be allowed to send data outside.
    • Unless, of course, that is required for them to function as advertised.
  • *One* adblocker (Score:5, Informative)

    by arosenfield ( 998621 ) on Tuesday October 20, 2020 @07:24PM (#60629778)

    *One* adblocker, which has been installed 300,000 times, is malicious. Not all adblockers that have been installed 300,000 times are necessarily malicious.

    (Yes yes, I know, the editors here can't be expected to actually make a comprehensible title.)

    • it's more of a scare tactic by the advertising industry?
    • No - it's actually 2 adblockers.... Also, you forgot: "Adblocking extensions with more than 300,000 active users have been surreptitiously uploading user browsing data and tampering with users' social media accounts thanks to malware...." Really dumb phrasing of both the title and this.
      • Actually... "Adblockers Installed 300,000 Times Are Malicious and Should Be Removed Now" --> if your adblocker has been installed 299,999 times or 300,001 times, then you're safe! Don't worry! Also like me on instagram please :3

    • by gweihir ( 88907 )

      Damn, and there I though we finally had an easy to check parameter to determine maliciousness!

  • Not sure I understand from this if uBlock Origin is safe or not?!?
  • What about discussing which adblockers are to be trusted, and then I mean both as in capable of disabling ads and the owner/developers are trustworthy. ?

    Also: Facebook ads. Please have mercy, Lolth, for I have not deserved this! =,-(

    • This! Because honestly... there are waaaay too many adblockers out there and I thought uBlock Origin was the best and most trustworthy... like wtf. Anyone have a good recommend?
      • uBlock Origin is fine. The problematic adblocker is Nano Adblocker, which forked from uBlock Origin, and later added malware "features".

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