HOMETHREATSLyceum .NET TCP Backdoor
APT / THREAT GROUP

Lyceum .NET TCP Backdoor

2
aliases
Last seen:Mar 17, 2026

Intelligence Profile

This .Net written malware is used as backdoor using the http protocol by a state sponsored threat actor. It implements additional capabilities (e.g. execution of commands, taking screenshots, listing diles/directories/installed applications, and uploading/downloading/execution of files). There are also variants using DNS (.Net) and also one written in Golang.

Threat Analysis

Lyceum .NET TCP Backdoor is a known-sophistication threat actor of undetermined national origin, engaged in cyber operations with a primary motivation of unknown activity patterns.

External References

→https://research.checkpoint.com/2022/state-sponsored-attack-groups-capitalise-on-russia-ukraine-war-for-cyber-espionage/

Quick Facts

TypeAPT / Threat Group
Aliases2

Also Known As

win.lyceum_http_backdoor_dotnetLyceum .NET TCP Backdoor

External Intelligence

Malpedia: win.lyceum_http_backdoor_dotnet

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.
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Lyceum .NET TCP Backdoor — APT / Threat Group | Threat Intelligence | CTIWATCH.COM