Sigma rule: Diamond Sleet APT Scheduled Task Creation - Registry

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-e64fcf3fba4a, updated 2023-10-24T00:00:00.000Z.

Rule

Title: Diamond Sleet APT Scheduled Task Creation - Registry
Status: test
Level: high
Author: Nasreddine Bencherchali (Nextron Systems)
Date: 2023-10-24
File: rules-emerging-threats/2023/TA/Diamond-Sleet/registry_event_apt_diamond_sleet_scheduled_task.yml
Commit: ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects registry event related to the creation of a scheduled task used by Diamond Sleet APT during exploitation of Team City CVE-2023-42793 vulnerability

Log source

product: windows
category: registry_event

Detection

selection:
    TargetObject|contains|all:
        - '\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\'
        - 'Windows TeamCity Settings User Interface'
condition: selection

False positives (as the rule lists them)

Unknown

MITRE ATT&CK ids this rule names

T1685

References

https://www.microsoft.com/en-us/security/blog/2023/10/18/multiple-north-korean-threat-actors-exploiting-the-teamcity-cve-2023-42793-vulnerability/

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/2023/TA/Diamond-Sleet/registry_event_apt_diamond_sleet_scheduled_task.yml

Sources and licences

SigmaHQ
"Diamond Sleet APT Scheduled Task Creation - Registry" by Nasreddine Bencherchali (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2023/TA/Diamond-Sleet/registry_event_apt_diamond_sleet_scheduled_task.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Diamond Sleet APT Scheduled Task Creation - Registry",
entity page, dataset version ref-e64fcf3fba4a, updated 2023-10-24T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/9f9f92ba-5300-43a4-b435-87d1ee571688 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 9f9f92ba-5300-43a4-b435-87d1ee571688, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.