Suspicious attachments and removable media
Which file types are risky, what to do with unexpected attachments, and why a found USB drive goes to IT, never into a computer.
- Level
- Beginner
- Length
- About 20 minutes
- Contents
- 3 lessons · 1 video · final exam
- Status
- Published · updated 1 Oct 2026
Skills you'll practise
- Recognize risky attachment types and double extensions.
- Handle unexpected attachments safely.
- Hand in found removable media without plugging it in.
Course outline
- 1.Suspicious attachments and removable mediaVideo · 4 min
- 2.Unexpected files are suspicious filesLesson · 8 min
- 3.File types and what they can doLesson · 8 min
- 4.USB devices, chargers and travelLesson · 8 min
- 5.Suspicious attachments and removable media: knowledge checkKnowledge check · 17 questions
- 6.USB drive found in the car parkScenario
- 7.Final exam6 questions · passing it completes the course, so people who already know the material can test out
Sources it draws on
The lessons and questions are written from these references, so learners can go back to the original.
- CISA: Using Caution with Email Attachments
- CISA: Using Caution with USB Drives
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