What is the fine-grained topic of the following text: There is no evidence that the malware contained on Ms. Zhang’s thumb drive got anywhere close to Trump’s electronic devices or the public Mar-a-Lago network, but the fact that it was able to get into the same building raises more uncomfortable questions about the security practices of the US Twitter-in-Chief. Only return the topic.
The security implications of malware found on Ms. Zhang's thumb drive at Mar-a-Lago.