Sigma rule: DNS RCE CVE-2020-1350

Rule

Title

DNS RCE CVE-2020-1350

Status

test

Level

critical

Author

Florian Roth (Nextron Systems)

Date

2020-07-15

Modified

2022-07-12

File

rules-emerging-threats/2020/Exploits/CVE-2020-1350/proc_creation_win_exploit_cve_2020_1350.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects exploitation of DNS RCE bug reported in CVE-2020-1350 by the detection of suspicious sub process

Log source

product

windows

category

process_creation

Detection

selection:
    ParentImage|endswith: '\System32\dns.exe'
filter:
    Image|endswith:
        - '\System32\werfault.exe'
        - '\System32\conhost.exe'
        - '\System32\dnscmd.exe'
        - '\System32\dns.exe'
condition: selection and not filter

False positives (as the rule lists them)

• Unknown but benign sub processes of the Windows DNS service dns.exe

Tags

• attack.initial-access
• attack.t1190
• attack.execution
• attack.t1569.002
• cve.2020-1350
• detection.emerging-threats

CVEs this rule names

• CVE-2020-1350

MITRE ATT&CK ids this rule names

• T1190
• T1569.002

References

• https://research.checkpoint.com/2020/resolving-your-way-into-domain-admin-exploiting-a-17-year-old-bug-in-windows-dns-servers/
• https://web.archive.org/web/20230329172447/https://blog.menasec.net/2019/02/threat-hunting-24-microsoft-windows-dns.html

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2020/Exploits/CVE-2020-1350/proc_creation_win_exploit_cve_2020_1350.yml