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wdormann's profile
Will Dormann
Will Dormann
Will Dormann
@wdormann

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Will Dormann

@wdormann

Vulnerability Analyst at the CERT/CC. My thoughts are my own, not my employer's.

Joined August 2012

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    1. Kevin Beaumont‏Verified account @GossiTheDog 11 Dec 2019
      • Report Tweet
      • Report NetzDG Violation

      Does anybody know how Emotet/Trickbot gets from a non-admin user to SYSTEM on Windows 7?

      20 replies 49 retweets 191 likes
      Show this thread
    2. Kevin Beaumont‏Verified account @GossiTheDog 11 Dec 2019
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      It's not credential misuse, they've actually injected into svchost on a reasonably patched Win7 box.

      5 replies 3 retweets 28 likes
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    3. Kevin Beaumont‏Verified account @GossiTheDog 11 Dec 2019
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      So I’m going to look into this more at the weekend, I’ve got a honeypot network called EmoPot (great name Kevin) which has gone Emotet to Trickbot, but they’re somehow injected into svchost.exe from normal userland, spitting out emails and such from it. 🍺pic.twitter.com/IsaoFH02AF

      7 replies 7 retweets 55 likes
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    4. Kevin Beaumont‏Verified account @GossiTheDog 12 Dec 2019
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      So this turned out to be a really valuable thread, thank you @neondhruv @XMPPwocky @jgajek and others for pointing at process hollowing direction as they're spot on. Two of the boxes are doing some weird things (Windows itself is unstable, e.g. can't even load Process Explorer).

      3 replies 1 retweet 10 likes
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    5. Will Dormann‏ @wdormann 12 Dec 2019
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      Replying to @GossiTheDog @neondhruv and

      But process hollowing doesn't inherently allow for escalation from non-admin to SYSTEM, right? Am I missing something?

      2 replies 0 retweets 4 likes
    6. Dhruv Majumdar‏ @neondhruv 12 Dec 2019
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      Replying to @wdormann @GossiTheDog and

      This is little more complicated than a simple process hollowing. Levergaes “double process hollowing” technique based on Windows Native API, leveraging the “svchost.exe” system process as a way to make privilege escalation & inject mal code . Sadly Win API poorly documented

      1 reply 1 retweet 4 likes
    7. mabrafoo‏ @mabraFoo 13 Dec 2019
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      Replying to @neondhruv @wdormann and

      Spent 4 hours searching github. Double process hollowing to priv esc is nowhere to be found. My OSCP exam is 3 weeks, so if you have working code remember sharing is caring. #tistheseason

      2 replies 0 retweets 0 likes
      Will Dormann‏ @wdormann 13 Dec 2019
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      Replying to @mabraFoo @neondhruv and

      I've seen no evidence that double process hollowing to priv esc is a thing. Only poorly-worded advisories that were likely parroted here. Were it a thing, and just how Windows is, then we can probably just forget about user accounts, security boundaries, and everything on Win.

      8:18 AM - 13 Dec 2019
      • 2 Likes
      • mabrafoo Jacob Gajek
      1 reply 0 retweets 2 likes
        1. Jacob Gajek‏ @jgajek 13 Dec 2019
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          Replying to @wdormann @mabraFoo and

          I agree. Would look for another privilege escalation mechanism prior to the process hollowing.

          0 replies 0 retweets 2 likes
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