A SIEM – standing for Security Information and Event Management – is a major IT tool with the objective of managing security events generated by information systems.
A SIEM solution allows your organization to finally make sense out of logs from different equipments in the information system. SIEM are meant to detect cyberattacks and IT threats by exploiting and filtering different logs coming from several information sources (that could be internal or external). It is a centralized and powerful supervision system that traditionally included two parts:
Today’s SIEM solutions also include network traffic analysis, sometimes on the 7 layers, input from vulnerability management solutions and data enrichment like information about malware and on-going threat. Going beyond the logs is critical to meet the needs of today’s IT security: collection, correlation, management, alerting, prevention and improvement. A SIEM is a major security tool that contributes to detect cyber threats, especially APT (Advanced Persistant Threats).
In order to be 100% efficient, organizational, human and legal aspects have to be taken into consideration when deploying SIEM software. And that often goes overlooked. As every organization is different in terms of security maturity, security threat, and internal operational capabilities, a SIEM needs the adequate processes behind it to gives all its potential.
SIEM can handle a very high number of data but sometimes it does not have to be like that. There is a misconception that event sources should send everything to the SIEM and it will take care of it. Without a well-balanced log level or if the monitored traffic is to wide, the SIEM and the operational processes behind it will quickly show their limits. Thus, choosing an appropriate SIEM solution starts from the threats, attack scenarios and compliance environment. They will tell which data is interesting to collect, how it should be processed and how long it should be kept. At this point, a SIEM solution can be chosen.
To know more about SIEM software, don’t hesitate to contact our team of experts.
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