The phrase "study at attack" can be replaced with other similar phrases that convey the idea of intense scrutiny or examination. Some synonyms for this phrase include "analyze aggressively," "examine with force," "investigate thoroughly," and "probe intensely." These phrases suggest a deep level of focus and attention to detail, often with the aim of uncovering weaknesses or vulnerabilities in a particular object of study. Whether one is studying a subject in academia, assessing the effectiveness of a product or strategy, or evaluating potential threats to security, using phrases like these can help convey the seriousness and meticulousness of the process.