On Sept. 16, 2021, the US Cybersecurity and Infrastructure Security Agency (CISA) released an alert warning that advanced persistent threat (APT) actors were actively exploiting newly identified vulnerabilities in a self-service password management and single sign-on solution known as ManageEngine ADSelfService Plus. The alert explained that malicious actors were observed deploying a specific webshell and other techniques to maintain persistence in victim environments; however, in the days that followed, a second unrelated campaign to carry out successful attacks against the same vulnerability was observed.