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Home/ATT&CK/Software/S1021
MITRE ATT&CK Malware

DnsSystem (S1021)

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[DnsSystem](https://attack.mitre.org/software/S1021) is a .NET based DNS backdoor, which is a customized version of the open source tool DIG.net, that has been used by [HEXANE](https://attack.mitre.org/groups/G1001) since at least June 2022.(Citation: Zscaler Lyceum DnsSystem June 2022)

Platforms: Windows

▪Techniques implemented (9)

T1132.001Standard EncodingT1041Exfiltration Over C2 ChannelT1105Ingress Tool TransferT1071.004DNST1059.003Windows Command ShellT1547.001Registry Run Keys / Startup FolderT1033System Owner/User DiscoveryT1005Data from Local SystemT1204.002Malicious File

▪Used by groups (1)

G1001HEXANE
S1021on MITRE ATT&CK →

MITRE ATT&CK® is a registered trademark of The MITRE Corporation. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation.