Spam Trends: Top Attachments Driving Malicious Campaigns

Malware authors tend to prefer specific types of file attachments in their campaigns to distribute malicious content.  During our routine threat landscape monitoring in the last three months, we observed some interesting patterns about the attachment types that are being used in various campaigns.

In February and March, we saw huge spam campaigns using ZIP files to send out GandCrab ransomware, and  DOC and XLSM files to distribute Trickbot banking trojan. In the same time period, we saw a similarly large campaign targeting American Express, and a ‘Winner’ scam, both using PDF file attachments.

We also noticed a new trend of disc image files (ISO and IMG) being used to spread malware, with a few small campaigns distributing AgentTesla InfoStealer and NanoCore RAT.

Read more at F-Secure

The Government Technology & Services Coalition's Homeland Security Today (HSToday) is the premier news and information resource for the homeland security community, dedicated to elevating the discussions and insights that can support a safe and secure nation. A non-profit magazine and media platform, HSToday provides readers with the whole story, placing facts and comments in context to inform debate and drive realistic solutions to some of the nation’s most vexing security challenges.

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