QUIETEXIT is a novel backdoor, based on the open-source Dropbear SSH client-server software, that has been used by APT29 since at least 2021. APT29 has deployed QUIETEXIT on opaque network appliances that typically don't support antivirus or endpoint detection and response tools within a victim environment.
|Application Layer Protocol
|Masquerading: Match Legitimate Name or Location
|Non-Application Layer Protocol
|Proxy: External Proxy