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You're reading from  Digital Forensics and Incident Response

Product typeBook
Published inJul 2017
PublisherPackt
ISBN-139781787288683
Edition1st Edition
Tools
Wireshark
Concepts
Forensics
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Author (1)
Gerard Johansen
Gerard Johansen
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Gerard Johansen

Gerard Johansen is an incident response professional with over 15 years' experience in areas like penetration testing, vulnerability management, threat assessment modeling, and incident response. Beginning his information security career as a cyber crime investigator, he has built on that experience while working as a consultant and security analyst for clients and organizations ranging from healthcare to finance. Gerard is a graduate of Norwich University's Master of Science in Information Assurance program and a certified information systems security professional. He is currently employed as a senior incident response consultant with a large technology company, focusing on incident detection, response, and threat intelligence integration.
Read more about Gerard Johansen

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Packet capture

Capturing network traffic is critical to having a full understanding of an incident. Being able to identify potential C2 traffic IP addresses may provide further information about the type of malware that might have infected a host. In other types of incidents, CSIRT members may be able to identify potential exfiltration methods that an external threat actor is utilizing.

One method is to set up what is referred to as a network tap. A network tap is a system in-line with the compromised host and the switch. For example, in the network diagram, if the host that is compromised is on the 192.168.1.0/24 subnet, the tap should be placed in between the host and the switch. This often involves placing a system in between the host and the switch.

Another option is to configure a Switched Port Analyzer (SPAN) port. In this configuration, the switch closest to the compromised host will have port mirroring enabled. This then sends the traffic from the entire segment the switch is on to...

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Digital Forensics and Incident Response
Published in: Jul 2017Publisher: PacktISBN-13: 9781787288683
© 2017 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Gerard Johansen

Gerard Johansen is an incident response professional with over 15 years' experience in areas like penetration testing, vulnerability management, threat assessment modeling, and incident response. Beginning his information security career as a cyber crime investigator, he has built on that experience while working as a consultant and security analyst for clients and organizations ranging from healthcare to finance. Gerard is a graduate of Norwich University's Master of Science in Information Assurance program and a certified information systems security professional. He is currently employed as a senior incident response consultant with a large technology company, focusing on incident detection, response, and threat intelligence integration.
Read more about Gerard Johansen

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