Blue team (computer security)
Group that provides security feedback
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Through Information system and Computer security
Some blue team objectives include:
- Using risk intelligence and digital footprint analysis to find and fix vulnerabilities and prevent possible security incidents.
- Conduct regular security audits such as incident response and recovery.
History
As part of the United States computer security defense initiative, red teams were developed to exploit other malicious entities that would do them harm. As a result, blue teams were developed to design defensive measures against such red team activities.
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Incident response
If an incident does occur within the organization, the blue team will perform the following six steps to handle the situation:
- Preparation
- Identification
- Containment
- Eradication
- Recovery
- Lessons learned
Operating system hardening
In preparation for a computer security incident, the blue team will perform hardening techniques on all operating systems throughout the organization.
Perimeter defense
The blue team should consider the network perimeter, including traffic flow, packet filtering, proxy firewalls, and intrusion detection systems.
Tools
Blue teams employ a wide range of tools allowing them to detect an attack, collect forensic data, perform data analysis and make changes to thwart future attacks and mitigate threats. The tools include:
Log management and analysis
- InTrust
- LogRhythm
- Microsoft Sentinel
- NetWitness
- Rapid7
- SolarWinds
- Splunk
Security information and event management (SIEM) technology
SIEM software supports threat detection and security incident response by performing real-time data collection and analysis of security events. This type of software also uses data sources outside of the network including indicators of compromise (IoC) threat intelligence.
Exercises
Blue teams take part in regular red team–blue team exercises, in which an attacking team attempts to compromise systems defended by the blue team under controlled conditions. One of the largest of these is Locked Shields, an annual live-fire cyber defence exercise organised since 2010 by the NATO Cooperative Cyber Defence Centre of Excellence (CCDCOE), in which national blue teams defend simulated critical infrastructure against a professional red team.