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patio11's profile
Patrick McKenzie
Patrick McKenzie
Patrick McKenzie
@patio11

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Patrick McKenzie

@patio11

I work for the Internet, at @stripe, mostly on accelerating startups. Opinions here are my own.

東京都 Tokyo
kalzumeus.com
Joined February 2009

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    1. Patrick McKenzie‏ @patio11 6 Jan 2018
      • Report Tweet
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      Patrick McKenzie Retweeted _MG_

      Great cinematic effect to reinforce an old lesson that everyone knows and few people really act like they believe: physical access to an unlocked device means the attacker roots it and anything it can connect to. This includes “physical access denominated in seconds.”https://twitter.com/_mg_/status/949684949614907395 …

      Patrick McKenzie added,

      1:02
      _MG_ @_MG_
      BadUSB Cable #2. HID attack through an Apple MacBook USB-C charger. Great for shared workspaces! Build info coming this month. Still working out some things. These cables work on just about any device with a USB port (Mac/Win/Linux, phones too) pic.twitter.com/b6254FvpLY
      Show this thread
      2 replies 39 retweets 77 likes
      Show this thread
    2. Patrick McKenzie‏ @patio11 6 Jan 2018
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      I *occasionally* worry that we focus on threats which pattern-match to hacking in movies as opposed to things which an actual attacker would use, like “spearphish publicly routable employees.”

      2 replies 1 retweet 32 likes
      Show this thread
      Patrick McKenzie‏ @patio11 6 Jan 2018
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      There’s a business model here, incidentally, on product client software, server software, and peripherals to guarantee this isn’t happening. “Alerts your security team every time a USB device that has not been blessed is inserted” is a reasonable posture at some places.

      7:44 PM - 6 Jan 2018
      • 1 Retweet
      • 31 Likes
      • James Prado Matt D Hamilton Andy Durdin Rochelle Grober Matt "summoning arachnogods" Olson Sam Schenkman-Moore The Butcher Jim Gray Michael Langford
      4 replies 1 retweet 31 likes
        1. New conversation
        2. Phil Dennis-Jordan‏ @pmjordan 6 Jan 2018
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          Replying to @patio11

          I'm guessing this thing pretends to be an Apple-branded USB keyboard: anything else will trigger the "unrecognised keyboard" dialog on macOS which blocks input until the user approves it. Hard to reliably "bless" devices, it's easy to fake vendor/product ID & serial numbers.

          2 replies 0 retweets 1 like
        3. Patrick McKenzie‏ @patio11 6 Jan 2018
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          Replying to @pmjordan

          I'm suggesting something on the order of "You special-order all hardware that gets attached to your fleet of macbooks, exceptions to be approved individually" Which is a totally insane security posture, except at those organizations where it very much is not.

          0 replies 0 retweets 3 likes
        4. End of conversation
        1. New conversation
        2. Mike Taber‏ @SingleFounder 7 Jan 2018
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          Replying to @patio11

          Unfortunately, much of the magic of identifying a hardware device is in the kernel. This is why the “safest” precaution is to fill the USB ports on corporate devices with glue so they’re unusable. Blocking USB devices has historically been all or nothing.

          1 reply 0 retweets 4 likes
        3. Mike Taber‏ @SingleFounder 7 Jan 2018
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          Replying to @SingleFounder @patio11

          In Windows, for example, the only reliable way we found to do this a while back was to modify the location where registry entries for USB devices were created to be read-only and change the inheritable permissions.

          0 replies 0 retweets 3 likes
        4. End of conversation
        1. New conversation
        2. Martin Vindahl Olsen‏ @mvindahl 6 Jan 2018
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          Replying to @patio11

          I worked at a place with *really* tight security. I was informed that the PCs had installed software which would instantly encrypt, and for all practical purposes brick, any non-company device inserted into a USB port. It would then be confiscated and sent to analysis.

          1 reply 0 retweets 0 likes
        3. Martin Vindahl Olsen‏ @mvindahl 6 Jan 2018
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          Replying to @mvindahl @patio11

          A cautionary tale was told of the guy who plugged in his phone for charging and ended up, several weeks later, with a small plastic bag containing his phone as a 1000-piece puzzle.

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. fREW‏ @frioux 6 Jan 2018
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          Replying to @patio11

          My wife used to work for a defense contractor and they had such alerting a decade ago. She saw people get walked out for accidentally (one hopes?) using a personal USB key

          1 reply 0 retweets 0 likes
        3. Jonathan Werrett‏ @werrett 6 Jan 2018
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          Replying to @frioux @patio11

          Technically feasiable, but imagine hiring / retaining good software devs in such an environment. ‘Patriotic’ causes excluded, of course

          1 reply 0 retweets 0 likes
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