detection.wiki

Detection rules › Sigma

Diamond Sleet APT Scheduled Task Creation

Status
test
Severity
critical
Log source
product windows, service security
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

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

MITRE ATT&CK coverage

TacticTechniques
ExecutionT1053.005 Scheduled Task/Job: Scheduled Task
PersistenceT1053.005 Scheduled Task/Job: Scheduled Task
Privilege EscalationT1053.005 Scheduled Task/Job: Scheduled Task

Event coverage

ProviderEventTitle
Security-AuditingEvent ID 4698A scheduled task was created.

Rule body yaml

title: Diamond Sleet APT Scheduled Task Creation
id: 3b8e5084-4de9-449a-a40d-0e11014f2e2d
status: test
description: |
    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
references:
    - https://www.microsoft.com/en-us/security/blog/2023/10/18/multiple-north-korean-threat-actors-exploiting-the-teamcity-cve-2023-42793-vulnerability/
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-10-24
tags:
    - attack.execution
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1053.005
    - detection.emerging-threats
logsource:
    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
falsepositives:
    - Unknown
level: critical

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

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

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
TaskContentmatch
  • uTYNkfKxHiZrx3KJ
TaskNameeq
  • \Windows TeamCity Settings User Interface