DnsSystem

MITRE ATT&CK: S1021 View on attack.mitre.org

Aliases: DnsSystem

First seen
2022-06-01 00:00:00
Malware type
backdoor
Family
Malware family
Operating systems
windows
Profile updated
2026-07-07 15:10:43

Targeted industries: energy-and-utilities

Context

DnsSystem is a .NET based DNS backdoor, which is a customized version of the open source tool DIG.net, that has been used by HEXANE since at least June 2022.

Detection coverage

  • 1 YARA rules
  • 212 Sigma rules

Malware & tools used

  • Standard Encoding (attack-pattern)
  • Exfiltration Over C2 Channel (attack-pattern)
  • Ingress Tool Transfer (attack-pattern)
  • DNS (attack-pattern)
  • Windows Command Shell (attack-pattern)
  • Registry Run Keys / Startup Folder (attack-pattern)
  • System Owner/User Discovery (attack-pattern)
  • Data from Local System (attack-pattern)
  • Malicious File (attack-pattern)

Used by threat actors

Detection rules

  • SEKOIA_Implant_Win_Lyceum (yara-rule)

Reports & references

  • zscaler.com — Lyceum Net Dns Backdoor (report)
  • MITRE ATT&CK — S1021 (report)

External references