  Cyclostationarity involves periodic statistical variations in signals and
processes, commonly used in signal analysis and network security. In the
context of attacks, cyclostationarity helps detect malicious behaviors within
network traffic, such as traffic patterns in Distributed Denial of Service
(DDoS) attacks or hidden communication channels in malware. This approach
enhances security by identifying abnormal patterns and informing Network
Intrusion Detection Systems (NIDSs) to recognize potential attacks, enhancing
protection against both known and novel threats. This research focuses on
identifying cyclostationary malware behavior and its detection. The main goal
is to pinpoint essential cyclostationary features used in NIDSs. These features
are extracted using algorithms such as Boruta and Principal Component Analysis
(PCA), and then categorized to find the most significant cyclostationary
patterns. The aim of this article is to reveal periodically changing malware
behaviors through cyclostationarity. The study highlights the importance of
spotting cyclostationary malware in NIDSs by using established datasets like
KDD99, NSL-KDD, and the UGRansome dataset. The UGRansome dataset is designed
for anomaly detection research and includes both normal and abnormal network
threat categories of zero-day attacks. A comparison is made using the Random
Forest (RF) and Support Vector Machine (SVM) algorithms, while also evaluating
the effectiveness of Boruta and PCA. The findings show that PCA is more
promising than using Boruta alone for extracting cyclostationary network
feature patterns. Additionally, the analysis identifies the internet protocol
as the most noticeable cyclostationary feature pattern used by malware.
Notably, the UGRansome dataset outperforms the KDD99 and NSL-KDD, achieving 99%
accuracy in signature malware detection using the RF algorithm and 98% with the
SVM.
