Sigma rule: RedSun - Named Pipe Created

Rule

Title

RedSun - Named Pipe Created

Status

experimental

Level

critical

Author

Swachchhanda Shrawan Poudel (Nextron Systems), @unresolvedhost

Date

2026-04-17

File

rules-emerging-threats/2026/Exploits/RedSun/pipe_created_win_exploit_redsun_named_pipe.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the creation of a named pipe with the hardcoded name "REDSUN".
The RedSun exploit tool uses a pipe with this name for synchronisation and command communication between its components during the Cloud Files API + oplock-based AV bypass and privilege escalation chain.
RedSun creates the pipe as \\??\pipe\REDSUN.
The pipe server listens for the token-duplicated elevated process to connect and respond, completing the privilege escalation from user to SYSTEM.
Presence of this pipe name indicates active or recent RedSun execution.

Log source

product

windows

category

pipe_created

Detection

selection:
    PipeName: '\REDSUN'
condition: selection

False positives (as the rule lists them)

• Unlikely

Tags

• attack.privilege-escalation
• attack.stealth
• attack.defense-impairment
• attack.t1055
• attack.t1685
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1055
• T1685

References

• https://github.com/Nightmare-Eclipse/RedSun/blob/7456cc8cf066f5e5fc6cdf7d3272a466ebd6b2f6/RedSun.cpp#L591
• https://deadeclipse666.blogspot.com/2026/04/public-disclosure-response-for-cve-2026.html

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2026/Exploits/RedSun/pipe_created_win_exploit_redsun_named_pipe.yml