Malware spread via USB drives poses a significant threat to emerging markets as threat actors look to target networks not connected to the internet, including those powering critical infrastructure.

Countries in Asia, Africa, and South America have been among the most infected, although researchers also noted isolated attacks in both Europe and North America, according to a Sept. 25 Kaspersky blog post.

USB devices and other removable media are also being used to spread cryptominers which were described as rare, but persistent threats, with some victims found to have been carrying the infection for years.

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