{"description": "Enterprise techniques used by DnsSystem, ATT&CK software S1021 (v1.0)", "name": "DnsSystem (S1021)", "domain": "enterprise-attack", "versions": {"layer": "4.5", "attack": "17", "navigator": "5.1.0"}, "techniques": [{"techniqueID": "T1071", "showSubtechniques": true}, {"techniqueID": "T1071.004", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021)  can direct queries to custom DNS servers and return C2 commands using TXT records.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": true}, {"techniqueID": "T1547", "showSubtechniques": true}, {"techniqueID": "T1547.001", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can write itself to the Startup folder to gain persistence.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": true}, {"techniqueID": "T1059", "showSubtechniques": true}, {"techniqueID": "T1059.003", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can use `cmd.exe` for execution.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": true}, {"techniqueID": "T1132", "showSubtechniques": true}, {"techniqueID": "T1132.001", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can Base64 encode data sent to C2.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": true}, {"techniqueID": "T1005", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can upload files from infected machines after receiving a command with `uploaddd` in the string.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": false}, {"techniqueID": "T1041", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can exfiltrate collected data to its C2 server.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": false}, {"techniqueID": "T1105", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can download files to compromised systems after receiving a command with the string `downloaddd`.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": false}, {"techniqueID": "T1033", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) can use the Windows user name to create a unique identification for infected users and systems.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": false}, {"techniqueID": "T1204", "showSubtechniques": true}, {"techniqueID": "T1204.002", "comment": "[DnsSystem](https://attack.mitre.org/software/S1021) has lured victims into opening macro-enabled Word documents for execution.(Citation: Zscaler Lyceum DnsSystem June 2022)", "score": 1, "color": "#66b1ff", "showSubtechniques": true}], "gradient": {"colors": ["#ffffff", "#66b1ff"], "minValue": 0, "maxValue": 1}, "legendItems": [{"label": "used by DnsSystem", "color": "#66b1ff"}]}