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dguido's profile
Dan Guido
Dan Guido
Dan Guido
@dguido

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Dan Guido

@dguido

CEO @trailofbits, organizer @EmpireHacking, director @hack_secure. Open DMs.

Brooklyn, NY
trailofbits.com
Joined April 2008

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    1. Will Strafach‏Verified account @chronic 17 Nov 2019
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      sure sounds like someone representing themselves as a person who knows how checkra1n works does not actually know what they’re talking about.pic.twitter.com/8ONEmDFB4A

      17 replies 28 retweets 147 likes
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    2. Dan Guido‏ @dguido 18 Nov 2019
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      Replying to @chronic

      The threat is that checkra1n is repackaged with a different payload, e.g., an PIN entry replacement that records what you type and POSTs it to a remote server. FaceID/TouchID being cached or not is an easy indicator that your device was rebooted. Is that reasonable?

      1 reply 0 retweets 2 likes
    3. Will Strafach‏Verified account @chronic 18 Nov 2019
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      Replying to @dguido

      when assessing that it would be easy to remove the logo and install a rootkit, was this actually attempted? or was the checkra1n development team contacted to verify the statement was true? was the source code examined?

      2 replies 0 retweets 2 likes
      Dan Guido‏ @dguido 18 Nov 2019
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      Replying to @chronic

      In the quote, it says "someone will modify checkra1n..." so the claim is whether this is possible at all. I know it hasn't been done (yet), but do you think it's possible to repackage checkra1n with a different payload?

      7:40 AM - 18 Nov 2019
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      • l4cr0ss
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        2. Dan Guido‏ @dguido 18 Nov 2019
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          Replying to @dguido @chronic

          Don't get me wrong: it would be work, but repackaging would be easier than developing everything from scratch. There are few people who can write an exploit for checkm8, but many who could engineer the kind of rootkit we're talking about. That's why checkra1n changes things.

          1 reply 0 retweets 1 like
        3. Dan Guido‏ @dguido 18 Nov 2019
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          Replying to @dguido @chronic

          Last thing: I don't have a problem with checkra1n. It is what it is! I know it's not made for evil. However, any abuse of components inside it will happen without permission, help, or maybe even knowledge of the original authors.

          1 reply 0 retweets 1 like
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