USB流量解密

    先执行指令提取有效信息

    1. tshark -r u.pcapng -T fields -e usb.capdata > usbdata.txt

    使用网上的脚本，解密

    1. #!/usr/bin/env python
    2. # -*- coding:utf-8 -*-
    4. normalKeys = {"04":"a", "05":"b", "06":"c", "07":"d", "08":"e", "09":"f", "0a":"g", "0b":"h", "0c":"i", "0d":"j", "0e":"k", "0f":"l", "10":"m", "11":"n", "12":"o", "13":"p", "14":"q", "15":"r", "16":"s", "17":"t", "18":"u", "19":"v", "1a":"w", "1b":"x", "1c":"y", "1d":"z","1e":"1", "1f":"2", "20":"3", "21":"4", "22":"5", "23":"6","24":"7","25":"8","26":"9","27":"0","28":"<RET>","29":"<ESC>","2a":"<DEL>", "2b":"\t","2c":"<SPACE>","2d":"-","2e":"=","2f":"[","30":"]","31":"\\","32":"<NON>","33":";","34":"'","35":"<GA>","36":",","37":".","38":"/","39":"<CAP>","3a":"<F1>","3b":"<F2>", "3c":"<F3>","3d":"<F4>","3e":"<F5>","3f":"<F6>","40":"<F7>","41":"<F8>","42":"<F9>","43":"<F10>","44":"<F11>","45":"<F12>"}
    5. shiftKeys = {"04":"A", "05":"B", "06":"C", "07":"D", "08":"E", "09":"F", "0a":"G", "0b":"H", "0c":"I", "0d":"J", "0e":"K", "0f":"L", "10":"M", "11":"N", "12":"O", "13":"P", "14":"Q", "15":"R", "16":"S", "17":"T", "18":"U", "19":"V", "1a":"W", "1b":"X", "1c":"Y", "1d":"Z","1e":"!", "1f":"@", "20":"#", "21":"$", "22":"%", "23":"^","24":"&","25":"*","26":"(","27":")","28":"<RET>","29":"<ESC>","2a":"<DEL>", "2b":"\t","2c":"<SPACE>","2d":"_","2e":"+","2f":"{","30":"}","31":"|","32":"<NON>","33":"\"","34":":","35":"<GA>","36":"<","37":">","38":"?","39":"<CAP>","3a":"<F1>","3b":"<F2>", "3c":"<F3>","3d":"<F4>","3e":"<F5>","3f":"<F6>","40":"<F7>","41":"<F8>","42":"<F9>","43":"<F10>","44":"<F11>","45":"<F12>"}
    6. output = []
    7. keys = open('usbdata.txt')
    8. for line in keys:
    9.     try:
    10.         if line[0]!='0' or (line[1]!='0' and line[1]!='2') or line[3]!='0' or line[4]!='0' or line[9]!='0' or line[10]!='0' or line[12]!='0' or line[13]!='0' or line[15]!='0' or line[16]!='0' or line[18]!='0' or line[19]!='0' or line[21]!='0' or line[22]!='0' or line[6:8]=="00":
    11.              continue
    12.         if line[6:8] in normalKeys.keys():
    13.             output += [[normalKeys[line[6:8]]],[shiftKeys[line[6:8]]]][line[1]=='2']
    14.         else:
    15.             output += ['[unknown]']
    16.     except:
    17.         pass
    18. keys.close()
    20. flag=0
    21. print("".join(output))
    22. for i in range(len(output)):
    23.     try:
    24.         a=output.index('<DEL>')
    25.         del output[a]
    26.         del output[a-1]
    27.     except:
    28.         pass
    29. for i in range(len(output)):
    30.     try:
    31.         if output[i]=="<CAP>":
    32.             flag+=1
    33.             output.pop(i)
    34.             if flag==2:
    35.                 flag=0
    36.         if flag!=0:
    37.             output[i]=output[i].upper()
    38.     except:
    39.         pass
    40. print ('output :' + "".join(output))

    易霖博CTF-keyboard - 图1

    在vim中敲入对应的按键得到（Vim）：
    易霖博CTF-keyboard - 图2