Unusual File Modification by dns.exe
Detects an unexpected file being modified by dns.exe which my indicate activity related to remote code execution or other forms of exploitation as seen in CVE-2020-1350 (SigRed)
Sigma rule (View on GitHub)
1title: Unusual File Modification by dns.exe
2id: 9f383dc0-fdeb-4d56-acbc-9f9f4f8f20f3
3related:
4 - id: 8f0b1fb1-9bd4-4e74-8cdf-a8de4d2adfd0 # FileDelete version
5 type: similar
6status: test
7description: Detects an unexpected file being modified by dns.exe which my indicate activity related to remote code execution or other forms of exploitation as seen in CVE-2020-1350 (SigRed)
8references:
9 - https://www.elastic.co/guide/en/security/current/unusual-file-modification-by-dns-exe.html
10author: Tim Rauch (Nextron Systems), Elastic (idea)
11date: 2022/09/27
12tags:
13 - attack.initial_access
14 - attack.t1133
15logsource:
16 category: file_change
17 product: windows
18detection:
19 selection:
20 Image|endswith: '\dns.exe'
21 filter:
22 TargetFilename|endswith: '\dns.log'
23 condition: selection and not filter
24falsepositives:
25 - Unknown
26level: high
References
Related rules
- Unusual Child Process of dns.exe
- Unusual File Deletion by Dns.exe
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- Remote Access Tool - Team Viewer Session Started On MacOS Host
- Remote Access Tool - Team Viewer Session Started On Windows Host