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DETECTION OVERVIEW
Risk Factors
Remote access software is a common target for attackers because of their prevalence in enterprise environments and they provide remote access to internal network devices. If an attacker collects system credentials, they can remotely control the desktop on the victim and potentially establish a command-and-control (C&C) channel.
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Category
Remote access software such as TeamViewer and remote service protocols such as the Remote Desktop Protocol (RDP), enable users to interact with the graphical user interface (GUI) of a device from a remote location. Attackers can remotely access devices after obtaining user credentials through phishing, device compromise, or brute force techniques. After connecting to the internal device, the attacker can establish a persistent presence, create an interactive C&C channel, or connect to other target systems within the network.
IT administrators often remotely interact with internal enterprise resources through remote desktop services. This legitimate activity can appear similar to malicious interactive remote desktop sessions.
Configure firewalls to block common remote service protocols, such as VNC (RFB) and RDP, to unknown external hosts
Disable or remove unnecessary desktop sharing software
Enforce multi-factor authentication for remote logins
Determine if any user credentials have been compromised for an unauthorized remote desktop connection
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