Query: Sigma YAML for windows / process_creation
Matching passage: Sigma rule: Detects the execution of certutil with certain flags that allow the utility to download files from direct IPs.. Logsource: windows / process_creation. Rule: title: Suspicious File Downloaded From Direct IP Via Certutil.EXE id: 13e6fe51-d478-4c7e-b0f2-6da9b400a829 related: - id: 19b08b1c-861d-4e75-a1ef-ea0c1baf202b type: similar - id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794 type: similar status: test description: Detects the execution of certutil with certain flags that allow the utility to download files from direct IPs. references: - https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/certutil - https://forensicitguy.github.io/agenttesla-vba-certutil-download/ - https://news.sophos.com/en-us/2021/04/13/compromised-exchange-server-hosting-cryptojacker-targeting-other-exchange-servers/ - https://twitter.com/egre55/status/1087685529016193025 - https://lolbas-project.github.io/lolbas/Binaries/Certutil/ - https://twitter.com/_JohnHammond/status/1708910264261980634 - https://www.hexacorn.com/blog/2020/08/23/certutil-one-more-gui-lolbin author: Nasreddine Bencherchali (Nextron Systems) date: 2023-02-15 modified: 2025-12-01 tags: - attack.stealth - attack.t1027 - attack.command-and-control - attack.t1105 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \certutil.exe - OriginalFileName: CertUtil.exe selection_flags: CommandLine|contains: - 'urlcache ' - 'verifyctl ' - 'URL ' selection_http: CommandLine|contains: - ://1 - ://2 - ://3 - ://4 - ://5 - ://6 - ://7 - ://8 - ://9 filter_main_seven_zip: CommandLine|contains: ://7- condition: all of selection_* and not 1 of filter_main_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_certutil_download_direct_ip/info.yml
Near-miss passage: Sigma rule: Detects the presence of the "u202+E" character, which causes a terminal, browser, or operating system to render text in. Logsource: windows / process_creation. Rule: title: Potential Defense Evasion Via Right-to-Left Override id: ad691d92-15f2-4181-9aa4-723c74f9ddc3 related: - id: e0552b19-5a83-4222-b141-b36184bb8d79 type: derived - id: 584bca0f-3608-4402-80fd-4075ff6072e3 type: derived status: test description: 'Detects the presence of the "u202+E" character, which causes a terminal, browser, or operating system to render text in a right-to-left sequence. This character is used as an obfuscation and masquerading techniques by adversaries to trick users into opening malicious files. ' references: - https://redcanary.com/blog/right-to-left-override/ - https://www.malwarebytes.com/blog/news/2014/01/the-rtlo-method - https://unicode-explorer.com/c/202E - https://tria.ge/241015-l98snsyeje/behavioral2 - https://unprotect.it/technique/right-to-left-override-rlo-extension-spoofing/ author: Micah Babinski, @micahbabinski, Swachchhanda Shrawan Poudel (Nextron Systems), Luc Génaux date: 2023-02-15 modified: 2026-03-20 tags: - attack.stealth - attack.t1036.002 logsource: category: process_creation product: windows detection: selection: CommandLine|contains: - \u202e - '[U+202E]' - ‮ condition: selection falsepositives: - Commandlines that contains scriptures such as arabic or hebrew might make use of this character level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_susp_right_to_left_override/info.yml