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# Forensic - I Cant Manipulate People (50 pts)

### Description

Partial traffic packet captured from hacked machine, can you analyze the provided pcap file to extract the message from the packet perhaps by reading the packet data?

Author: Ap0k4L1p5

Hint : Attacker too noob to ping not in sequence

Attachment : <https://ctf2024.wargames.my/files/d718720df4684370911db2629cf1f67c/traffic.pcap?token=eyJ1c2VyX2lkIjo3OCwidGVhbV9pZCI6MzQsImZpbGVfaWQiOjM2fQ.Z3EPAQ.9ECmNCDOoo4_VO_KNbTPS0OOim0>

### Solution

We were given a traffic.pcap file. We need to analyze the pcap file first based on the clue

<figure><img src="/files/zAUuwpsZ3imYuMl7HGzT" alt=""><figcaption></figcaption></figure>

We find out that there are a lot of ping request. When we see the last byte in the first 4 packet, it shows "WGMY" string, the flag format. We now know that we need to extract the last byte of each ICMP packet

```python
from scapy.all import *

def extract(pcap_file):
    packets = rdpcap(pcap_file)

    for packet in packets:
        if ICMP in packet:
            raw_data = bytes(packet[ICMP].payload)
            if raw_data:
                last_byte = raw_data[-1]
                print(chr(last_byte), end='')

extract("traffic.pcap")
```

### Flag

<figure><img src="/files/hJOS1Sz90fbsqKs1DHEG" alt="" width="458"><figcaption></figcaption></figure>

`WGMY{1e3b71d57e466ab71b43c2641a4b34f4}`


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