CrowdStrike discusses the challenges and methodologies involved in identifying web shells, specifically focusing on the detection of Deep Panda web shells, which are malicious scripts used by adversaries to gain remote access to victim systems. The process involves employing a technique known as file stacking to identify uncommon files by analyzing file creation times and paths across multiple servers, thereby detecting anomalies that could indicate malicious activity. The method focuses on searching specific directories and file extensions related to web hosting, highlighting the importance of timestamp analysis to differentiate between legitimate and suspicious activities. Additionally, the text emphasizes the importance of understanding the typical patterns of file creation and grouping to effectively isolate potential threats in a network environment.