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marcan42's profile
Hector Martin
Hector Martin
Hector Martin
@marcan42

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Hector Martin

@marcan42

If it ain't broke, I'll fix it! I'm porting Linux to Apple Silicon Macs at @AsahiLinux. http://patreon.com/marcan  | http://github.com/sponsors/marcan 

Tokyo, Japan
marcan.st
Joined May 2009

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    1. dragosr‏ @dragosr 12 Jun 2018
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      Replying to @swordofomen @marcan42 and

      You are so hung up on the ground that you are missing the point about the picked up RF. Pictures on the left are without the signal, floating ground (batt scope), pictures on the right are with signal, same measurement, same device, same cables, same location. Note impulses.pic.twitter.com/78L8yVCofg

      1 reply 0 retweets 0 likes
    2. Hector Martin‏ @marcan42 12 Jun 2018
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      Replying to @dragosr @swordofomen and

      You seem to have issues understanding the concept that a signal that repeats on a 16.66 ms cycle is mains noise. I don't care what it looks like. It's going to look different for different PSUs. It's still mains noise. Protip: your scope isn't going to show you "RF" at 1ms/div.

      2 replies 0 retweets 13 likes
    3. dragosr‏ @dragosr 12 Jun 2018
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      Replying to @marcan42 @swordofomen and

      Are you sure about that?https://youtu.be/dtfu2ZgmV8w 

      3 replies 0 retweets 0 likes
    4. Hector Martin‏ @marcan42 12 Jun 2018
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      Replying to @dragosr @swordofomen and

      Wow, my phone charger is possessed too. Look at all those glitch pulses! (Or, you know, it's just normal noise from a switching power supply)pic.twitter.com/BwhSCXsJ1M

      4 replies 3 retweets 18 likes
    5. dragosr‏ @dragosr 12 Jun 2018
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      Replying to @marcan42 @swordofomen and

      You seem awfully intent on dimissing my hypothesis. Were you part of the dev team or something?

      6 replies 0 retweets 0 likes
    6. Joe Fitz‏ @securelyfitz 12 Jun 2018
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      Replying to @dragosr @marcan42 and

      Ive been quiet on this thread so far, but Dragos, what is the hypothesis? I think Hector and others are showing you the data and procedure (however indirectly) to test your hypothesis.

      3 replies 0 retweets 6 likes
    7. dragosr‏ @dragosr 12 Jun 2018
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      Replying to @securelyfitz @marcan42 and

      hypothesis is that RF noise is being injected into dwc_otg

      1 reply 0 retweets 1 like
    8. dragosr‏ @dragosr 12 Jun 2018
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      Replying to @dragosr @securelyfitz and

      and audio pwm is being used to transfer data in and out sdr style after.

      1 reply 0 retweets 0 likes
    9. Andrea Barisani‏Verified account @AndreaBarisani 12 Jun 2018
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      Replying to @dragosr @securelyfitz and

      This is a textbook case of confirmation bias. You are ignoring facts from experts as they are not the explanation you would like to hear. In combination with not making a single filesystem dump available anywhere it becomes impossible to reason with any of your analysis.

      2 replies 0 retweets 11 likes
    10. dragosr‏ @dragosr 12 Jun 2018
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      Replying to @AndreaBarisani @securelyfitz and

      How many of your raspis have an mmc1? I can give you a file system dump but it won’t help much as the fun stuff is loaded into a ramdisk from inaccessible hidden partition and only the unmodified components are available to dump. Offline forensics won’t make much headway.

      2 replies 0 retweets 0 likes
      Hector Martin‏ @marcan42 12 Jun 2018
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      Replying to @dragosr @AndreaBarisani and

      All of them have mmc1, you idiot. The Raspberry Pi 3 B has built-in WiFi. *SDIO* WiFi. How do you think it connects to the SoC, magic pixie dust?pic.twitter.com/buAT7zvlIH

      5:53 PM - 12 Jun 2018
      • 1 Like
      • SΞbastien F4GRX
      2 replies 0 retweets 1 like
        1. New conversation
        1. Hector Martin‏ @marcan42 12 Jun 2018
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          Replying to @marcan42 @dragosr and

          Seriously, you have *no excuse* for this stuff. The moment you saw "mmc1" you should've looked at sysfs to find out what that is used for, or the device tree to figure out how it's configured. This is just shoddy research. https://github.com/raspberrypi/linux/blob/rpi-4.14.y/arch/arm/boot/dts/bcm2837-rpi-3-b.dts …

          1 reply 0 retweets 1 like
        2. dragosr‏ @dragosr 12 Jun 2018
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          Replying to @marcan42 @AndreaBarisani and

          Don't care what it's used for there, as long as adversary has multiple control links in (probably multiple operators). Static thinking again. A few lines of code and dev will deploy other use in 15 minutes. Analysis needs to wait for control neutralization/isolation.

          1 reply 0 retweets 0 likes
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