T1021.005 VNC
sub-techniqueEnterpriseAdversaries may use Valid Accounts to remotely control machines using Virtual Network Computing (VNC). VNC is a platform-independent desktop sharing system that uses the RFB (“remote framebuffer”) protocol to enable users to remotely control another computer’s display by relaying the screen, mouse, and keyboard inputs over the network. VNC differs from Remote Desktop Protocol as VNC is screen-sharing software rather than resource-sharing software. By default, VNC uses the system's authentication, but it can be configured to use credentials specific to VNC. Adversaries may abuse VNC to perform malicious actions as the logged-on user such as opening documents, downloading files, and running arbitrary commands. An adversary could use VNC to remotely control and monitor a system to collect data and information to pivot to other systems within the network. Specific VNC libraries/implementations have also been susceptible to brute force attacks and memory usage exploitation.
platforms
Platforms this applies to.
tactics
ATT&CK tactics this technique serves.
sub-technique of
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mitigations
ATT&CK mitigations that reduce this.
detected by (4)
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NIST CSF 2.0 — areas of relevance (Protect / Detect)
NIST CSF 2.0 areas this most relates to (evidence-ranked).
- DE.CMContinuous Monitoringmoderate · backed by 8 of 22 mapped controls
- PR.AAIdentity Management, Authentication, and Access Controlmoderate · backed by 7 of 22 mapped controls
- PR.DSData Securitymoderate · backed by 7 of 22 mapped controls
Derived from MITRE CTID (Apache-2.0) and the NIST 800-53 ↔ CSF crosswalk (public domain). Indicative relevance along the Protect/Detect axis — not a compliance assessment or coverage claim.
mitigating controls (22)
Security controls that mitigate this.
groups (4)
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software (7)
Malware and tools associated with this.
Detected by (Sigma) (1)
Sigma detection rules related to this.
source
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