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SANROCK U61W Drone Notes

sending packet every ~50ms

Shenzhen_63:cc:a2 (84:ea:97:63:cc:a2) (RA) 802.11 68 802.11 Block Ack, Flags=........C

Ports 6000 and 40000 Host port 6000 is receiving video Drone port 40000 is sending video Host port 5010 is sending instructions Drone port 40000 is receiving instructions

Controls:

Control section of packet seems to be starting with hex bytes 63 63 and ending with 99

6363 0a00 000b 0066 8080 8080 8080 801c 8c99 45e1 423d

63630a00000b0066808080808080801c8c9945e1423d

Bytes:

63 63 0a 00 00 0b 00 66 80 80 80 80 80 80 80 0c 8c 99 aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar

aa - start of message (63) ab - start of message (63) ac - ? ad - ? ae - ? af - ? ag - ? ah - start of frame (66) ai - right stick X (neutral = 80) aj - right stick Y (neutral = 80) ak - left stick Y (neutral = 80) al - left stick X (2f-d0) (neutral = 80) am - trim vertical bar (base = 80) an - trim right bar (base = 80) ao - trim left bar (base = 80) ap - 0c = neutral, 1c = take off, 2c = land aq - ? see below ar - end of frame (99)

aq:

wildcard command? checksum maybe? (XOR of ) modes: speed, headless

Tilt: Joysticks (byte aq): 8c - low speed 84 - high speed 8e - headless mode low speed 86 - headless mode high speed

Example frame:

17:11:50.635419 2412 MHz 11n -27dBm signal antenna 1 26.0 Mb/s MCS 3 20 MHz long GI IP (tos 0x0, ttl 64, id 50828, offset 0, flags [none], proto UDP (17), length 46) 192.168.0.2.5010 > 192.168.0.1.40000: [udp sum ok] UDP, length 18 0x0000: 4500 002e c68c 0000 4011 32df c0a8 0002 E.......@.2..... 0x0010: c0a8 0001 1392 9c40 001a d297 6363 0a00 .......@....cc.. 0x0020: 000b 0066 8080 8080 8080 800c 8c99 ...f..........

Kali VM Notes:

xrandr --newmode "1920x1080" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync xrandr --addmode Virtual1 1920x1080 xrandr --output Virtual1 --mode 1920x1080

airmon-ng start wlan0 airodump-ng wlan0mon airodump-ng --channel 1 --bssid 84:EA:97:63:CC:A2 wlan0mon tcpdump -i wlan0mon udp 'port 5010' -Xvv

Hardware:

udirc-WiFi-63CCA2 BSSID PWR Beacons #Data, #/s CH MB ENC 84:EA:97:63:CC:A2 -16 30 0 0 1 26 OPN Shenzhen Icomm Semiconductor Co., Ltd.

    0x0000:  4500 0027 7215 0000 4011 875d c0a8 0002  E..'r...@..]....                                                                                                                                                                 
    0x0010:  c0a8 0001 1392 9c40 0013 5699 6363 0a00  .......@..V.cc..                                                                                                                                                                 
    0x0020:  0004 00a0 0001 0af2 5f8c a7              ........_..                                                                                                                                                                      

    0x0000:  4500 0027 3d72 0000 4011 bc00 c0a8 0002  E..'=r..@.......                                                                                                                                                                 
    0x0010:  c0a8 0001 1392 9c40 0013 5699 6363 0a00  .......@..V.cc..                                                                                                                                                                 
    0x0020:  0004 00a0 0001 0aef 2816 cd              ........(..                                                                                                                                                                      

    0x0000:  4500 0027 f983 0000 4011 ffee c0a8 0002  E..'....@.......                                                                                                                                                                 
    0x0010:  c0a8 0001 1392 9c40 0013 5699 6363 0a00  .......@..V.cc..                                                                                                                                                                 
    0x0020:  0004 00a0 0001 0acd 499c fd              ........I..            



	0x0000:  4500 002e 5089 0000 4011 a8e2 c0a8 0002  E...P...@.......                                                                                                                                                                 
    0x0010:  c0a8 0001 1392 9c40 001a d297 6363 0a00  .......@....cc..                                                                                                                                                                 
    0x0020:  000b 0066 8080 8080 8080 800c 8c99 9e70  ...f...........p                                                                                                                                                                 
    0x0030:  3492                                     4.                                                                                                                                                                               

    0x0000:  4500 002e c61f 0000 4011 334c c0a8 0002  E.......@.3L....                                                                                                                                                                 
    0x0010:  c0a8 0001 1392 9c40 001a d297 6363 0a00  .......@....cc..                                                                                                                                                                 
    0x0020:  000b 0066 8080 8080 8080 800c 8c99 2886  ...f..........(.                                                                                                                                                                 
    0x0030:  f713                                     ..                                                                                                                                                                               

4500 002e feac 0000 4011 fabe c0a8 0002 c0a8 0001 1392 9c40 001a d297 6363 0a00 000b 0066 8080 8080 8080 800c 8c99 45e1 423d

4500002efeac00004011fabec0a80002c0a8000113929c40001ad29763630a00000b0066808080808080801c8c9945e1423d

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Reverse engineering a cheap toy drone (SANROCK U61W)

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