Sigma rule: Diamond Sleet APT Scheduled Task Creation

Rule

Title

Diamond Sleet APT Scheduled Task Creation

Status

test

Level

critical

Author

Nasreddine Bencherchali (Nextron Systems)

Date

2023-10-24

File

rules-emerging-threats/2023/TA/Diamond-Sleet/win_security_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

service

security

definition

The Advanced Audit Policy setting Object Access > Audit Other Object Access Events has to be configured to allow this detection. We also recommend extracting the Command field from the embedded XML in the event data.

Detection

selection:
    EventID: 4698
    TaskName: '\Windows TeamCity Settings User Interface'
    TaskContent|contains: 'uTYNkfKxHiZrx3KJ'
condition: selection

False positives (as the rule lists them)

• Unknown

Tags

• attack.execution
• attack.privilege-escalation
• attack.persistence
• attack.t1053.005
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1053.005

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/win_security_apt_diamond_sleet_scheduled_task.yml