UNK_MassTraction, a suspected China-aligned actor, exploits Roundcube webmail flaws to steal credentials and deploy the VShell backdoor at universities. #UNKMassTraction #Roundcube #VShell #CyberEspionage #Proofpoint #InfoSec http://securityonline.info/unk-masstraction-roundcube-vshell/?utm_source=mastodon&utm_medium=jetpack_social