A fresh wave of Zeppelin ransomware attacks discovered in late August went undetected by antivirus defenses as the result of a new trojan downloader and research suggests the attacks might be targeted.

The presumably targeted infections were announced in a blog post by Juniper Threat Labs researcher Asher Langton.

“This campaign shows an evolution of the trojan downloader that relies on heavy obfuscation of visual basic code hidden in what seems like random text within the document itself instead of the macro code,” Mounir Hahad, head of Juniper Threat Labs, told SC Media.

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