USB Killer


It was a usual gloomy winter morning. My colleagues and I were drinking our morning coffee, sharing the news and there were no signs of trouble. But then a friend told about…

(a quote from a chat in Skype):

I read an article about how a dude in the subway fished out a USB flash drive from the outer pocket of some guy’s bag. The USB drive had “128” written on it. He came home, inserted it into his laptop and burnt half of it down. He wrote “129” on the USB drive and now has it in the outer pocket of his bag…

A Picture to Attract Attention:

Since I work in the company engaged in the development and manufacture of electronics, my colleagues and I are began to discuss options for creating a USB flash drive, that «would burn half a laptop down.» We had plenty of hardcore, fantastic, as well as quite real, options. This fun discussion could have been the end of the story, if I was not going to order the production of printed circuit boards for other projects.

As a rule, the USB interface of a computer has a USB plug connection -> ESD diodes (static protection) -> filter elements -> security elements in the chip that contains the physical layer of the USB interface. In modern computers, the USB “physics” is built almost in the processor. In older computers, North/South bridges are in charge of the USB. The task of the designed USB flash drive is to burn all of this stuff, or at least kill the USB port.

Within a week, I have developed quite specific circuit implementation, ordered components. After a few months of waiting for them, I made a full-fledged prototype. I tested the idea and “burnt down” everything I could.

USB Killer Prototype

Then, I developed and ordered printed circuit boards in China and made a combat model.

Off-topic: ordered it all here. Terrible quality.

Soldered it by hand, I am so-so mounter.

I designed it as a regular USB flash drive.

The basic idea of the USB drive is quite simple. When we connect it up to the USB port, an inverting DC/DC converter runs and charges capacitors to -110V. When the voltage is reached, the DC/DC is switched off. At the same time, the filed transistor opens. It is used to apply the -110V to signal lines of the USB interface. When the voltage on capacitors increases to -7V, the transistor closes and the DC/DC starts. The loop runs till everything possible is broken down. Those familiar with the electronics have already guessed why we use negative voltage here. I‘ll explain to others that negative voltage is easier to commutate, as we need the N-channel field resistor, which, unlike the P-channel one, can have larger current for the same dimensions.

I’m not going to talk to you about the application area, but a former colleague says that it’s like an atomic bomb: cool to have, but can not be applied.

Arriving at work, you find a USB drive on your table. What would you do?

  • insert the USB drive into the port to see the content
  • throw it in the trash

Would you buy such «device»?

  • yes
  • no


  1. It needs to have en eInk display to say 128, 129,…
  2. Shut up and take my money!!!
  3. what about making it a normal usb drive as well. let me explain. when one inserts the drive, one gets asked for a password. if you type the wrong password, the usb drive shows you some fake content, and in the background “burns down” everything it can
  4. EVIL <3 ;)
  5. Ahh the floppy disk bomb is reborn! haha
  6. Where can I buy one?
  7. Send to Brazil? Please responde to [email protected]


  8. Id commit to buying a few dozen if it actually works. Please make.
  9. when/where can I buy and can you post a demonstration by any chance?
  10. I am interested in purchasing some of these. If / when they become available please contact me as to how to purchase some.

    Thank You.

  11. This just made me rich! There’s both ‘offense’ and ‘defense.’ So, when the kickstarter happens, then there will be some ‘defense’ (combat condoms) also starting up! ;-) But, the ‘getting rich’ doesn’t even involve that. Those who cannot see how this can make them plenty rich are rather short-sighted; and, it doesn’t have to be limited to USB. There are several, shall I say, «augmentations» that can be (and will be done) to this cool little toy. I am a former electronics engineer as well. :)
  12. Where can I buy one?Who can give me the link?
  13. When it will be on sale? Maybe kickstarter? When it will be on sale?
  14. Sold..where can I get one?
  15. I have some questions: What is the damage? how many things can you recuperate from the «nuked» PC/Laptop. If it’s a PC, what’s the damage there?
  16. Where can I buy one! Wait, where can I buy a dozen of these!
  17. Someone has already done something similar on Indiegogo
  18. I with Renaud. But I’d buy it only as a zapper, too.
  19. Is this HW open source? It definitely should be! It would be better to make them in China for anywhere from 1 to 5 dollars, people would order them by tens, maybe hundreds! (The eink comment with counter is great idea!
  20. Afaik, it’s not open sourced.
  21. Would you buy such «device»? Hell yeah, if only for the fun of placing one or two of them in the parking-lots of our beloved city council or municipal police station.
  22. This would probably not solve anything in the long run because If this gets big and someone would find this USB, common knowledge would be that it’s either a fake, destroying one or a real one. Since these sticks are easy to open, it’s easy to check if there are actual memory chips in there or if there’s a hidden tesla coil destroying your whole PC ^^
  23. Hi, where did you get the USB case from?
  24. where can I order? :D
  25. Someone has already done something similar on Indiegogo
  26. Scam.
  27. How would it act when a USB hub or switch is used? What will be destroyed?

    I can imagine that the HW design of those devices is the key. Still I would really like to see if the intermediate hardware could prevent destruction.

  28. Where can i find the schematics for this device?
  29. It’s not «open-sourced».
  30. I would buy one definitely (if the cost is not that high). Will be waiting for one on kickstarter/indiegogo
  31. want one too!!! (if you are not going to open a kickstarter you are a fool)
  32. PLEASE sell these! At least just sell the PCBs, or sell the design for it. I would absolutely pay money for something like this. I would never use it on somebody else’s property of course, but the idea is just way to hilariously cool not to have.
  33. Start a kickstarter. I’ll buy a dozen.
  34. Someone has already done something similar on Indiegogo
  35. Open this on Kickstarter please, I will buy a hundred straight away :)
  36. Sell them now.
  37. I Love To Buy 100 Pieces With Design Under Development Agreement 3:)

    I Appreciate If You Can Bring It As Open Source.

  38. I could think of a few uses. But it is kind of a doomsday device. I believe it is feasible, though I question the destructive potential as described. Yes it would nuke (generic term for descriptive purposes only) whatever it was plugged into, but «burn it down»? Logitech and Microsoft both had wireless mouse dongles that would short and melt USB ports; I simply question the fire potential. That being said, if I were to test it, it would be in an open space with no flammable materials around and some kind of shielding between me and the sacrificial pc. And an extinguisher, just in case.
  39. can i buy it?
  40. Post video of USB Killer in action, please?
  41. I would buy one. Please convince the author to do a KickStater. It would let him gather the initial money to mass product his «usb killer» and he would be able to make a profit.
  42. He is thinking about the Kickstarter project. Not sure about the timing though.
  43. I love it so much <3 :) Could you please share the circuit diagram? I want to make it by myself… Thank you very much
  44. Can I get his email and name to send to him buisness message?
  45. I can see there is an website on deepweb selling some kind of device acting like the «killer usb» you described here. I don’t know if I’m allowed to put the link in here, but here you go darkusb7n4zlgkcu.onion
  46. It looks like a scam…
  47. I’ve sent them an email asking about proof and demonstration and this is their response:

    «Hello dear friend,

    You have all the reason not to trust any service on deepweb and the beauty part of it is that everyone can be scammed. If we scam people, won’t last too long and we will lost any credibility. We did not put all this effort to create the website and tor services just to scam for .5BTC, it’s not worth it. Did evomarket offered any warranties for their customers? No. They scammed a few days ago for thousand BTC. Who can we trust?

    Our electronist is anon, we’re working with him only by upfront payment. We’ll ask for him some documentation soon, the main problem is that we are the only ones who sell this beauty for the moment and we’ll like to keep it that way.

    As soon we receive the documentation, we’ll upload it to our website.

    Thank you for your interest,

    Best wishes, DaskUSB Team»

  48. Any new on a Kickstarter or any kind of development?
  49. I was thinking: There must be some workaround of detecting this USB. I mean, it sends a -110V so maybe attaching it with some USB power source which in turn is connected with a multimeter or something. Somehow, one may get the idea of detecting an opposite flow of current. Isn’t that possible?
  50. Pufff… Fake method sukz! African stuff method! lmao
  51. Very interesting device. Where can I buy it, please? Some people said me that the one on Indiegogo is a scam. Or: could you build 3 o 4 pieces for me? Thank you!
  52. I would buy it, dude! count on me for 8 units for me and my pals.
  53. Yeees i would buy it broo :D
  54. i want it! how to get one Evil Killer?????
  55. how much it price!!!
  56. i want it! how much!
  57. Someone has already done something similar on Indiegogo
  58. It doesn’t look trustworthy. Whole description of a product was stupidly copy/pasted from this page.
  59. I’ll call BULLSHIT!

    First of all, there is no such thing as a «n-channel field resistor»….

    Second of all, I forwarded this article to my father, an Electronics Engineer of over 50 years.

    He stated that your «theory is wacky at best»…..

    Send me an eval unit! I’ll have a proto-USB condom up and running in a few hours!

  60. Author is actually thinking to start a Kickstarter.
  61. I would buy one. Please convince the author to do a KickStater. It would let him gather the initial money to mass product his «usb killer» and he would be able to make a profit.

Ropes — Fast Strings

Most of us work with strings one way or another. There’s no way to avoid them — when writing code, you’re doomed to concatinate strings every day, split them into parts and access certain characters by index. We are used to the fact that strings are fixed-length arrays of characters, which leads to certain limitations when working with them. For instance, we cannot quickly concatenate two strings. To do this, we will at first need to allocate the required amount of memory, and then copy there the data from the concatenated strings.