High DNS Requests Rate - Firewall

calendar Apr 21, 2023 · attack.exfiltration attack.t1048.003 attack.command_and_control attack.t1071.004  ·
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High DNS requests amount from host per short period of time

Sigma rule (View on GitHub)

 1title: High DNS Requests Rate - Firewall
 2id: 51186749-7415-46be-90e5-6914865c825a
 3status: unsupported
 4description: High DNS requests amount from host per short period of time
 5author: Daniil Yugoslavskiy, oscd.community
 6date: 2019/10/24
 7modified: 2023/03/24
 8tags:
 9    - attack.exfiltration
10    - attack.t1048.003
11    - attack.command_and_control
12    - attack.t1071.004
13logsource:
14    category: firewall
15detection:
16    selection:
17        dst_port: 53
18    timeframe: 1m
19    condition: selection | count() by src_ip > 1000
20falsepositives:
21    - Legitimate high DNS requests rate to domain name which should be added to whitelist
22level: medium

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