Hacking_and_Penetration_Testing_with_Low_Power_Devices

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Power sources 97 WALL POWER When it is available, wall (mains for Brits and Australians) power can be the simplest choice. The power input connector utilizes a fairly standard 2.15.5 mm barrel plug. This is the same power connector found in the Arduino and several other small devices. As previously discussed, the Beagles require 50.25 V input. While a headless drone will require 1 A of current or less, I recommend you purchase power adapters that supply at least 2 A of current. The reason for this is that certain peripherals (to be discussed in more detail in the next chapter) have high-current requirements. There is little sense in buying an adapter that only works in certain circumstances. IT PAYS TO LISTEN Cheap isn’t always the least expensive In the fall of 2012, shortly after releasing the initial version of The Deck, I built a complete penetration testing system consisting of a BeagleBoard-xM with a 7 in. touchscreen cape installed in a Buzz Lightyear lunchbox. A few months later, I had a few students who were doing a radiofrequency identification (RFID) research project. The students decided to use the same BeagleBoard-xM and touchscreen cape and install their experiment inside a video game guitar. This system was running The Deck and came to be dubbed the Haxtar. They purchased a 1 A, 5 V power adapter with a 2.15.5 mm barrel plug. When they plugged in the Haxtar, it would continuously reboot. The touch screen required so much power that the voltage dipped below 4.75 V, causing the board to reset. I had told them to purchase a 2 A adapter. They mistakenly bought a 1 A adapter from the same manufacturer. Before buying power adapters, you should look at likely penetration testing scenarios. Do you frequently travel to other countries having different power standards? If so, it might be a good idea to use adapters that are compatible with multiple standards. Alternatively, adapters could be used when traveling outside your home country. If you want an adapter with interchangeable plugs, the Phihong PSC12R-050-R is a good choice. Phihong also makes power plugs specific to a particular region at less than half the price if you don’t foresee performing penetration tests in foreign lands. The part numbers for 5V 2A adapters for the United States and EU are PSC12A-050-R and PSC12E-050-R, respectively. Several of the standard BeagleBoard distributors offer power supplies. Special Computing offers a 2.6 ampere adapter at a reasonable price (https://specialcomp. com/beaglebone/). Adafruit offers a 2 ampere adapter (http://www.adafruit.com/ products/276). USB POWER If you are fortunate enough to get physical access to the offices of your penetration test’s target organization, you can plant a dropbox. The BeagleBone is small enough to hide behind a desktop computer system. Available USB ports are a potential power source for the BeagleBone.
98 CHAPTER 5 Powering The Deck Power limitations for USB ports need to be kept in mind. Drawing more than 500 mA from a USB port is somewhat risky. A dropbox connected to a wired network should easily operate from a single USB port. If additional current is required, a Y-cable can be used. Resist the temptation to use some of the inexpensive USB chargers that are available. Cheap chargers may not provide a consistent 5 V under load. Read the sidebars in this chapter if you need motivation not to do this. USB power supplies such as the Phihong PSA10F-050Q-R or USB ports on automotive jumpstarters are probably safe to use. Buying manufactured USB power cables is recommended for most users. Whether you make your own cables or buy them, you must ensure that the wires are sufficiently thick to safely provide the required current without excessive voltage drop. Wire thickness is measured using the American wire gauge (AWG). In this system, wires with smaller AWG numbers are thicker. Table 5.1 presents the approximate maximum length for wires of a specified gauge delivering 2 A of current with at least 4.75 V output with 5.00 V input. Special Computing provides USB power cables in custom lengths up to 6 feet (https://specialcomp.com/beaglebone/). SparkFun Electronics sells a 3 ft 500 mA cable (https://www.sparkfun.com/products/8639). An online search should yield a number of additional sources for these cables. Y-cables are a bit harder to find and you may be forced to make your own should you require them. If you choose to make your own cables, the Kycon KUSBX-AP-KIT-SC USB A plug kit available from Mouser Electronics is affordable and convenient. Mouser also sells a Kycon KLDX-PA-0202-A-LT 2.15.5 mm barrel connector for the BeagleBone end of the power cable. Pin 1, positive 5 V, on the USB plug should be connected to the center of the barrel connector. The outside barrel connector, ground, should be connected to Pin 4 on the USB plug. BATTERY POWER Wall power isn’t terribly exciting. After all, traditional desktops and laptops can be used when wall power is available. Things get a little less boring when powering Beagles via USB ports on target computer systems. Where it really gets interesting is when we realize that the Beagles can be hidden around our penetration test target and run for days off of battery power. Table 5.1 Approximate Maximum Length for Wires Delivering 2 A of Current AWG Approximate Maximum Length (feet) 26 1.5 24 2.8 22 4.5 20 7
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Hacking and Penetration Testing wit
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Hacking and Penetration Testing wit
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Dedicated to my favorite wife, my f
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Contents Foreword..................
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Contents ix Network Hubs and Switch
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Foreword So I will start out this f
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Author Biography Dr. Philip Polstra
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Acknowledgments First and foremost,
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CHAPTER Meet the deck 1 INFORMATION
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The deck 3 FIGURE 1.1 Collection of
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The deck 5 FIGURE 1.4 Fern WiFi Cra
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The deck 7 MODES OF OPERATION One o
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The deck 9 stores data only on a lo
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Summary 11 I knew that The Deck, wh
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CHAPTER Meet the beagles 2 INFORMAT
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Texas instruments devices 15 FIGURE
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Texas instruments devices 17 proces
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Texas instruments devices 21 The AD
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Texas instruments devices 23 WHY NO
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CHAPTER Installing a base operating
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Introduction 29 FIGURE 3.2 QNX smar
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Introduction 31 FIGURE 3.4 Android
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Introduction 33 (http://openembedde
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Introduction 35 FIGURE 3.6 Arch Lin
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Introduction 37 Sabayon In the phys
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Introduction 39 Table 3.7 Fedora Pe
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Introduction 41 tar xJf debian*.xz
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Ubuntu options 43 supportive commun
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Creating a microSD Card 45 Device t
Page 64 and 65: Chapter 3 Appendix: digging deeper
Page 72 and 73: CHAPTER Filling the toolbox 4 INFOR
Page 74 and 75: Adding a graphical environment 57 b
Page 76 and 77: Adding a graphical environment 59 W
Page 78 and 79: Adding a graphical environment 61 t
Page 80 and 81: Adding tools the easy way 63 The li
Page 82 and 83: Adding tools the easy way 65 check_
Page 84 and 85: Adding tools the easy way 67 echo -
Page 86 and 87: Adding tools the hard way 69 # chec
Page 88 and 89: Adding tools the hard way 71 descri
Page 90 and 91: Adding tools the hard way 73 FIGURE
Page 102 and 103: Adding tools the hard way 85 dl_src
Page 104 and 105: Starter set of tools 87 and possibl
Page 106 and 107: Starter set of tools 89 #get John w
Page 108 and 109: Starter set of tools 91 The company
Page 110 and 111: CHAPTER Powering The Deck 5 INFORMA
Page 112 and 113: Power requirements 95 the city and
Page 116 and 117: Power sources 99 Thanks to commonly
Page 118 and 119: Power sources 101 Table 5.2 Duracel
Page 120 and 121: Reducing power consumption 103 REDU
Page 122 and 123: Penetration testing with a single b
Page 138 and 139: Summary 121 site. In-depth testing
Page 140 and 141: CHAPTER Input and output devices 6
Page 142 and 143: Display options 125 FIGURE 6.1 LCD7
Page 144 and 145: IEEE 802.11 wireless 127 The Alfa A
Page 146 and 147: BeagleBone capes 129 FIGURE 6.4 UAR
Page 148 and 149: BeagleBone capes 131 pull-up resist
Page 150 and 151: BeagleBone capes 133 FIGURE 6.7 XBe
Page 152 and 153: BeagleBone capes 135 Newly created
Page 154 and 155: BeagleBone capes 137 Table 6.1 Cape
Page 156 and 157: BeagleBone capes 139 If you don’t
Page 158 and 159: Penetration testing with a single r
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Penetration testing with a single r
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Summary 153 if "done" in status.ite
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CHAPTER Building an army of devices
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Using IEEE 802.15.4 networking 157
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Configuring IEEE 802.15.4 modems 15
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Remote control the easy way 167 FIG
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Remote control via python 169 seria
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Remote control via python 171 impor
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Remote control via python 173 elif
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Remote control via python 175 dnum
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Remote control via python 177 rc_na
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Remote control via python 179 The M
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Remote control via python 181 } [ "
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Remote control via python 183 Merel
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Saving power 185 on the modem. The
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Adding security 187 a different cha
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Expanding Your Reach 189 FIGURE 7.1
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Penetration testing with multiple d
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Summary 203 # if IP and MAC aren’
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CHAPTER Keeping your army secret 8
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Hiding devices 207 FIGURE 8.2 At fi
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Hiding devices 209 FIGURE 8.4 Car d
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Hiding devices 211 FIGURE 8.7 Wirel
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Hiding devices 213 FIGURE 8.11 Unde
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Hiding devices 215 FIGURE 8.14 Unde
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FIGURE 8.17 Inside the Dalek Desk D
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FIGURE 8.21 The haxtar. The haxtar
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Installing devices 221 example, wea
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CHAPTER Adding air support 9 INFORM
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Building the AirDeck 225 Latte is s
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Building the AirDeck 227 what you a
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Using your aerial drone 229 Power i
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Using your aerial drone 231 Install
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Alternative aircraft 233 else { //
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CHAPTER Future directions 10 INFORM
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Closing thoughts 237 For reasons me
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Index Note: Page numbers followed b
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Index 241 configuration, 77-79, 83f
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Index 243 Python scripts, 143-144 w
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