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Modern NDR
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DETECTION OVERVIEW
Risk Factors
The VNC desktop-sharing system is a common target for attackers because VNC provides remote access to other devices over the Remote Frame Buffer (RFB) protocol. Attackers can find weak VNC passwords with low-cost techniques such as brute force attacks. If an attacker has credentials for several devices on the network, they can easily open multiple VNC connections from a single device to control many devices on the network.
The system might change the risk score for this detection.
Kill Chain
Risk Score
60
Disable VNC access where unless required
Limit the number of VNC login attempts and then block IP addresses that exceed this number
Disable guest access to prevent anonymous users from establishing VNC connections without a password
Enable encryption to prevent exposure of plaintext credentials
Modify VNC permissions to only allow connections from trusted devices
