Detection rules › Sigma

Wannacry Killswitch Domain

Status
test
Severity
high
Log source
category dns
Author
Mike Wade
Source
github.com/SigmaHQ/sigma

Detects wannacry killswitch domain dns queries

MITRE ATT&CK coverage

Rule body yaml

title: Wannacry Killswitch Domain
id: 3eaf6218-3bed-4d8a-8707-274096f12a18
status: test
description: Detects wannacry killswitch domain dns queries
references:
    - https://www.mandiant.com/resources/blog/wannacry-ransomware-campaign
author: Mike Wade
date: 2020-09-16
modified: 2022-03-24
tags:
    - attack.command-and-control
    - attack.t1071.001
logsource:
    category: dns
detection:
    selection:
        query:
            - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.testing'
            - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.test'
            - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
            - 'ayylmaotjhsstasdfasdfasdfasdfasdfasdfasdf.com'
            - 'iuqssfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
    condition: selection
falsepositives:
    - Analyst testing
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    query:
        - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.testing'
        - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.test'
        - 'ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.com'
        - 'ayylmaotjhsstasdfasdfasdfasdfasdfasdfasdf.com'
        - 'iuqssfsodp9ifjaposdfjhgosurijfaewrwergwea.com'

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
queryeq
  • ayylmaotjhsstasdfasdfasdfasdfasdfasdfasdf.com
  • ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.com
  • ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.test
  • ifferfsodp9ifjaposdfjhgosurijfaewrwergwea.testing
  • iuqssfsodp9ifjaposdfjhgosurijfaewrwergwea.com