This challenge involved a pcap file that contained ICMP 26,682 packets, all with src/dst IPs of 127.0.0.1
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[![](https://i.imgur.com/6c8HbWN.png)]
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Scrolling through the packets, some of the packets had a lot of trailing trailing characters that were the same. I created a script to see if there was any pattern that emerged. 
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```#!/usr/bin/env python3
from scapy.all import *
packets = rdpcap('loopback.pcap')
rawlist = []
for i in packets:    x = str(i[Raw].load)    for k in range(5,8):        if x[-k] == x[-8]:            rawlist.append(x[-8])
flag = ""new_rawlist = rawlist[::6]for letter in new_rawlist:    flag += str(letter) print("The flag is: " + flag)```
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This output the following:
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```The TestFlag is: PPPPPPNNNNNNGGGGGGrrnnnnrrIIIIIIHHHHHHDDDDDDRRRRRRrrrrrrqqqqqq888888ggggggAAAAAAMMMMMMAAAAAAaaaaaa      ccccccHHHHHHRRRRRRMMMMMMzzzzzz&&&&&&uuuuuu000000``````::::::ppppppQQQQQQ<<<<<