Malware Brief: XWorm, TrickMo, and Remcos
Barracuda Networks, Thursday, October 23rd, 2025
With Halloween approaching, I figured it would be a good idea to dedicate this Malware Brief post to threats that transform themselves or have undergone significant changes. Because that's sort of like putting on a costume, get it? Okay, it's not the best thematic tie-in ever, but it's what I got, don't @ me.
Anyway, we're going to have a look at three threats. First is XWorm, a remote-access Trojan (RAT) that does it all and uses many different techniques to sneak into networks. Its wide availability in cracked forms has helped grow its popularity.
Next comes TrickMo, an Android Trojan that started out as the desktop malware TrickBot, before going mobile.