DPRK Threat Actor - C2 Communication DNS Indicators

Status: test
Severity: high
Log source: category dns_query, product windows
Author: Nasreddine Bencherchali (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects DNS queries for C2 domains used by DPRK Threat actors.

Known false positives

Unlikely

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	No specific technique

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 22: DNSEvent (DNS query)

Rule body

title: DPRK Threat Actor - C2 Communication DNS Indicators
id: 4d16c9a6-4362-4863-9940-1dee35f1d70f
status: test
description: Detects DNS queries for C2 domains used by DPRK Threat actors.
references:
    - https://www.verfassungsschutz.de/SharedDocs/publikationen/DE/cyberabwehr/2024-02-19-joint-cyber-security-advisory-englisch.pdf?__blob=publicationFile&v=2
author: Nasreddine Bencherchali (Nextron Systems)
date: 2024-02-20
tags:
    - attack.command-and-control
    - detection.emerging-threats
logsource:
    product: windows
    category: dns_query
detection:
    selection:
        QueryName:
            - 'connection.lockscreen.kro.kr'
            - 'updating.dothome.co.kr'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    QueryName:
        - 'connection.lockscreen.kro.kr'
        - 'updating.dothome.co.kr'

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`QueryName`	eq	`connection.lockscreen.kro.kr` `updating.dothome.co.kr`	`field:"QueryName" kind:eq`

DPRK Threat Actor - C2 Communication DNS Indicators

Known false positives

MITRE ATT&CK coverage

Telemetry coverage

Rule body

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`