OP's post history is illuminating.
On this particular article, "DeepSeek can be used to create malware" is unsurprising. Know what else can be used to create malware? Microsoft Visual Studio. Too complicated? Forums on the internet. Sam Altman's OpenAI, which they allege was used to train DeepSeek.
This isn't a breach. Nothing is getting breached here. A more honest title might be "I can use DeepSeek to help me code malware!" but this is not surprising, novel or unique to DeepSeek. See: OpenAI above. Also see: all the ways people have gotten OpenAI to simply tell them how to commit crimes with the right phrasing.