TXZ Files: The New Trojan Horse in Your Inbox?

Malicious e-mail attachments often disguise themselves creatively. Recently, unusual TXZ extensions have emerged, primarily being renamed RAR archives. These deceptive tactics aim to exploit Windows 11’s native support for these file types. While not yet common, blocking TXZ files might be a wise precaution against…

Hot Take:

Just when you thought threat actors couldn’t get any sneakier, they hit you with TXZ files. Yup, nothing says “I’m up to no good” like renaming your RAR archives to something even your grandma’s ancient laptop doesn’t recognize!

Key Points:

  • Malicious e-mail attachments are now coming disguised as TXZ files.
  • TXZ files are actually rerouted RAR archives with a new identity.
  • Windows 11 supports opening TXZ and RAR files natively, making it easier for recipients to fall for the trap.
  • Two distinct campaigns were identified, targeting specific languages and distributing GuLoader and FormBook malware.
  • Consider blocklisting or quarantining TXZ files to mitigate risk.

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