127 lines
3.8 KiB
Markdown
127 lines
3.8 KiB
Markdown
# Pcap Inspection
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{% hint style="info" %}
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A note about **PCAP** vs **PCAPNG**: there are two versions of the PCAP file format; P**CAPNG is newer and not supported by all tools**. You may need to convert a file from PCAPNG to PCAP using Wireshark or another compatible tool, in order to work with it in some other tools.
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{% endhint %}
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## Online tools for pcaps
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* If the header of your pcap is **broken** you should try to **fix** it using: [http://f00l.de/hacking/**pcapfix.php**](http://f00l.de/hacking/pcapfix.php)\*\*\*\*
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* Extract **information** and search for **malware** inside a pcap in [**PacketTotal**](https://packettotal.com/)\*\*\*\*
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* Search for **malicious activity** using [**www.virustotal.com**](https://www.virustotal.com/) and [**www.hybrid-analysis.com**](https://www.hybrid-analysis.com/)\*\*\*\*
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## Extract Information
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The following tools are useful to extract statistic, files...
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### Wireshark
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{% hint style="info" %}
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**If you are going to analyze a PCAP you basically must to know how to use Wireshark**
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{% endhint %}
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You can find some Wireshark trick in:
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{% page-ref page="wireshark-tricks.md" %}
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### Xplico Framework
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Xplico can **analyze** a **pcap** and extract information from it. For example, from a pcap file Xplico extracts each email \(POP, IMAP, and SMTP protocols\), all HTTP contents, each VoIP call \(SIP\), FTP, TFTP, and so on.
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#### Install
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```bash
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sudo bash -c 'echo "deb http://repo.xplico.org/ $(lsb_release -s -c) main" /etc/apt/sources.list'
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sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 791C25CE
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sudo apt-get update
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sudo apt-get install xplico
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```
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#### Run
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```text
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/etc/init.d/apache2 restart
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/etc/init.d/xplico start
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```
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Access to _**127.0.0.1:9876**_ with credentials _**xplico:xplico**_
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Then create a **new case**, create a **new session** inside the case and **upload the pcap** file.
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### NetworkMiner
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Like Xplico it is a tool to analyze and extract objects from pcaps. It has a free edition that you can download [here](https://www.netresec.com/?page=NetworkMiner).
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### [BruteShark](https://github.com/odedshimon/BruteShark)
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* Extracting and encoding usernames and passwords \(HTTP, FTP, Telnet, IMAP, SMTP...\)
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* Extract authentication hashes and crack them using Hashcat \(Kerberos, NTLM, CRAM-MD5, HTTP-Digest...\)
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* Build visual network diagram \(Network nodes & users\)
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* Extract DNS queries
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* Reconstruct all TCP & UDP Sessions
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* File Carving
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### Capinfos
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```text
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capinfos capture.pcap
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```
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### Ngrep
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If you are **looking** for **something** inside the pcap you can use **ngrep**. And example using the main filters:
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```text
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ngrep -I packets.pcap "^GET" "port 80 and tcp and host 192.168 and dst host 192.168 and src host 192.168"
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```
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### Carving
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Using common carving techniques can be useful to extract files and information from the pcap:
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{% page-ref page="../partitions-file-systems-carving/file-data-carving-recovery-tools.md" %}
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## Check Exploits/Malware
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### Suricata
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#### Install and setup
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```text
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apt-get install suricata
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apt-get install oinkmaster
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echo "url = http://rules.emergingthreats.net/open/suricata/emerging.rules.tar.gz" >> /etc/oinkmaster.conf
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oinkmaster -C /etc/oinkmaster.conf -o /etc/suricata/rules
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```
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#### Check pcap
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```text
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suricata -r packets.pcap -c /etc/suricata/suricata.yaml -k none -v -l log
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```
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### YaraPcap
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\*\*\*\*[**YaraPCAP**](https://github.com/kevthehermit/YaraPcap) is a tool that
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* Reads a PCAP File and Extracts Http Streams.
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* gzip deflates any compressed streams
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* Scans every file with yara
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* writes a report.txt
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* optionally saves matching files to a Dir
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### Malware Analysis
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Check if you can find any fingerprint of a known malware:
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{% page-ref page="../malware-analysis.md" %}
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## Other pcap analysis tricks
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{% page-ref page="dnscat-exfiltration.md" %}
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{% page-ref page="usb-keyboard-pcap-analysis.md" %}
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{% page-ref page="wifi-pcap-analysis.md" %}
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