The Israeli military found a USB key with instructions for the production of a “cyanide dispersion device” on the body of a Hamas operative who participated in the Oct. 7 terrorist attack, according to two Israeli officials and a copy of a classified Israeli Foreign Ministry cable obtained by Axios.
The same reason anyone takes a USB stick anywhere: to inconspicuously drop in a conspicuous place in hopes that some rube will find it, put it in their PC, and get pwnd.