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jonasLyk's profile
Jonas L
Jonas L
Jonas L
@jonasLyk

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Jonas L

@jonasLyk

viking @the_secret_club

Joined February 2015

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    1. Kevin Beaumont‏Verified account @GossiTheDog Jul 20

      I wrote about #HiveNightmare aka #SeriousSAM (blame @cyb3rops for that one), an unpatched Windows 10 vulnerability that allows any non-admin user to access the full system registry, including sensitive areas. Terribly badly coded PoC included.https://doublepulsar.com/hivenightmare-aka-serioussam-anybody-can-read-the-registry-in-windows-10-7a871c465fa5 …

      13 replies 174 retweets 401 likes
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    2. Kevin Beaumont‏Verified account @GossiTheDog Jul 20

      Btw there's a pretty big logic gap in one of the fixes I've seen floated online - it doesn't impact the snapshots.pic.twitter.com/HlgfsBEvL1

      4 replies 2 retweets 38 likes
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    3. Kevin Beaumont‏Verified account @GossiTheDog Jul 20

      Added US-CERT vulnerability note for this, written by @wdormann. It’s excellent and clearly lays out the problem. #HiveNightmare #SeriousSAM https://www.kb.cert.org/vuls/id/506989 pic.twitter.com/kp3EcyAM06

      3 replies 34 retweets 80 likes
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    4. Kevin Beaumont‏Verified account @GossiTheDog Jul 20

      Btw a fairly surefire custom EDR detection or hunt rule for this is non-admin user successfully read accessing c:\Windows\System32\config\SAM, SYSTEM and/or SECURITY. Or just any user other than SYSTEM, pretty much.

      5 replies 7 retweets 59 likes
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    5. Kevin Beaumont‏Verified account @GossiTheDog Jul 21

      Updated write up to include CVE-2021-36934 being allocated by Microsoft for this (pretty quick response by them). Their write up suggests back in 2018, somebody enabled inheritance on the registry hive folder in error, that’s my reading anyhoo.

      3 replies 6 retweets 33 likes
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    6. Kevin Beaumont‏Verified account @GossiTheDog Jul 21

      Microsoft have published an article about how erase snapshots (needed for the mitigation for this vuln)… but I kind of feel it’s not written in a way the average sysadmin will digest. But here it is anyway. https://support.microsoft.com/en-us/topic/kb5005357-delete-volume-shadow-copies-1ceaa637-aaa3-4b58-a48b-baf72a2fa9e7 …

      3 replies 7 retweets 28 likes
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    7. Kevin Beaumont‏Verified account @GossiTheDog Jul 22

      Been in and updated my #HiveNightmare/#SeriousSAM post. Includes custom detections, EDR blocks, hunting, script to auto apply mitigation etc. MS have updated the MSRC page to say all Windows 10 versions released in past 3 years impacted. https://doublepulsar.com/hivenightmare-aka-serioussam-anybody-can-read-the-registry-in-windows-10-7a871c465fa5 …pic.twitter.com/fzFI2NNz6V

      8 replies 20 retweets 56 likes
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    8. Jonas L‏ @jonasLyk Jul 26
      Replying to @GossiTheDog

      what if you first overwrite your c: so it points to \device\HarddiskVolumeShadowCopy1\windows\system32\config\ - then just open c:\sam ? do the tools then detect it?pic.twitter.com/0zbttnMg9e

      2 replies 12 retweets 48 likes
      Jonas L‏ @jonasLyk Jul 26
      Replying to @jonasLyk @GossiTheDog

      this is how to do it- yes you can do it as unprivpic.twitter.com/C15mcR25QB

      12:50 PM - 26 Jul 2021
      • 1 Retweet
      • 28 Likes
      • Khalsa Kesari Umair Ali Zafar Jörn Henkel Cas van Cooten Conor Richard bohops Mohamad Al-Bawab Erik Svavar Hermannsson
      1 reply 1 retweet 28 likes
        1. Conor Richard‏ @xenosCR Jul 27
          Replying to @jonasLyk @GossiTheDog

          What is that tool you are using?

          1 reply 0 retweets 0 likes
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