Attachment

Attachments are files embedded within online communication channels such as emails, instant messages, or social networks. File attachments can come in any form, such as images, documents, or programs. A paper clip image often symbolize the presence of attachments in messages. Since attachments come in many forms, threat actors often use this feature to drop malware on user system. One way to fool users to download malicious files is by renaming attachments in a way that escapes suspicion.