The Canada-based Women CyberSecurity Society (WCS2) has warned that its leadership, members, and volunteers are being targeted by an SMS phishing (smishing) campaign, IT World Canada reports. “A volunteer recently reported receiving a text message claiming to be from founder Lisa Kearney citing an urgent need for help,” WCS2 says.

In the previous post, we’ve discussed how passive OS identification can be done based on different network protocols. We’ve also used the OSI model to categorize the different indicators and prioritize them based on reliability and granularity. In this post, we will focus on the network and transport layers and introduce a machine learning OS identification model based on TCP/IP header values.