【轉帖】特製 USB 手指一插燒壞電腦

一位俄羅斯研究人員在得悉上述的事件之後,覺得事情十分有趣,並發現原來 USB 原來也可以為電腦帶來危機,於是便決定自己動手製作一款名為 USB Killer 的 USB 手指。據了解該位名為 Dark Purple 的研究人員在中國購入了一塊特別定製的電路板及其他配件,然後便製成了可摧毀電腦及 Notebook 等裝置的 USB Killer。



至於 USB Killer 如何令電腦燒毀,Dark Purple 指其實原理十分簡單。當 USB Killer 插入 USB 插槽之後,反向式的 DC/DC 變壓器便會開始運作,並從電腦提取電力,將電容充至 -110V。而當電壓到達後,DC/DC 變壓器就會關閉,而 -110V 的電壓便會再通過晶體管傳送回 USB 接口。之後當電容增加至 -7V 時,DC/DC 變壓器又會再開始運作。上述的循環將會一直不斷維持下去,直到最後電壓不斷變動令電腦內的組件燒毀時,該步驟才會停止運行。



由於大部份電腦的處理器都與 USB 集成起來,因此這種透過 USB 去攻擊電腦的方式可說是非常有效。由此可見,之前有安全研究人員曾經提過 USB 會為電腦帶來安全隱患,其實也並非毫無道理,例如這種利用電壓不斷提升溫度並燒毀的方法,便是一個好好例子。因此不論任何情況下,千萬不要使用來歷不明的 USB 手指,否則任何電腦及 Notebook 隨時隨地都會變成一個會爆炸的計時炸彈。

Source:http://unwire.hk/2015/05/26/usb-killer/notebook/

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.



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

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.

http://kukuruku.co/hub/diy/usb-killer

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有冇熟電子既師兄可以再進一步解釋下?

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謝謝,又識多一樣智識.

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回覆 3# davidEX


    簡單黎講即係用DC to DC step up/ amp大個V(電子元件放大) ,之後用並聯CAP bank 整流,最後放電一野擊穿控制器電晶體

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有得買就正攞

(Sent from HKEPC iPhone app)

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提示: 作者被禁止或刪除 內容自動屏蔽

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回覆 6# hunterman
唔知有冇人試下d最貴既料同最cheap既料死亡時間差幾遠同死相如何
好似ecs vs asus 

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但依家啲底板冇任何保護電路,去防護依種電擊?

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但依家啲底板冇任何保護電路,去防護依種電擊?
davidEX 發表於 2015-5-27 17:42
任何防護裝置都有反應時間同限度
呢個設計一直淨係食5V儲電,表現正常,係發難果一下爆出110V
就算有防護系統,都唔會受得住USB 110V

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