ESET Research has found LuckyMouse, Tick, Winnti Group, and Calypso, among others, are likely using the recent Microsoft Exchange vulnerabilities to compromise email servers all around the world. ESET Research has discovered that more than ten different advanced persistent threat (APT) groups are exploiting the recent Microsoft Exchange vulnerabilities to compromise email servers. ESET has … More Exchange servers under siege from at least 10 APT groups