Query: rule covering Detects the execution of certutil with certain flags that allow the utility to download files from file-sharing websites
Matching passage: Sigma rule: Detects the execution of certutil with certain flags that allow the utility to download files from file-sharing websites. Logsource: windows / process_creation. Rule: title: Suspicious File Downloaded From File-Sharing Website Via Certutil.EXE id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794 related: - id: 19b08b1c-861d-4e75-a1ef-ea0c1baf202b type: similar - id: 13e6fe51-d478-4c7e-b0f2-6da9b400a829 type: similar - id: 8b48ad89-10d8-4382-a546-50588c410f0d type: similar - id: d635249d-86b5-4dad-a8c7-d7272b788586 type: similar - id: 52182dfb-afb7-41db-b4bc-5336cb29b464 type: similar - id: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99 type: similar - id: e0f8ab85-0ac9-423b-a73a-81b3c7b1aa97 type: similar - id: 7b434893-c57d-4f41-908d-6a17bf1ae98f type: similar - id: 8518ed3d-f7c9-4601-a26c-f361a4256a0c type: similar - id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb type: similar - id: b6e04788-29e1-4557-bb14-77f761848ab8 type: similar - id: a0d7e4d2-bede-4141-8896-bc6e237e977c type: similar - id: 297ae038-edc2-4b2e-bb3e-7c5fc94dd5c7 type: similar status: test description: Detects the execution of certutil with certain flags that allow the utility to download files from file-sharing websites. 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://www.microsoft.com/en-us/security/blog/2024/01/17/new-ttps-observed-in-mint-sandstorm-campaign-targeting-high-profile-individuals-at-universities-and-research-orgs/ - https://www.hexacorn.com/blog/2020/08/23/certutil-one-more-gui-lolbin author: Nasreddine Bencherchali (Nextron Systems) date: 2023-02-15 modified: 2026-03-29 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: - .githubusercontent.com - 0x0.st - anonfiles.com - bashupload.com - cdn.discordapp.com - chunk.io - ddns.net - dl.dropboxusercontent.com - ghostbin.co - github.com - glitch.me - gofile.io - hastebin.com - mediafire.com - mega.nz - onrender.com - pages.dev - paste.ee - pastebin.com - pastebin.pl - pastetext.net - privatlab.com - privatlab.net - send.exploit.in - sendspace.com - storage.goo
Near-miss passage: Sigma rule: Detects the creation of a file with the name "code_tunnel.json" which indicate execution and usage of VsCode tunneling u. Logsource: windows / file_event. Rule: title: Renamed VsCode Code Tunnel Execution - File Indicator id: d102b8f5-61dc-4e68-bd83-9a3187c67377 status: test description: 'Detects the creation of a file with the name "code_tunnel.json" which indicate execution and usage of VsCode tunneling utility by an "Image" or "Process" other than VsCode. ' references: - https://ipfyx.fr/post/visual-studio-code-tunnel/ - https://badoption.eu/blog/2023/01/31/code_c2.html author: Nasreddine Bencherchali (Nextron Systems) date: 2023-10-25 tags: - attack.command-and-control logsource: category: file_event product: windows detection: selection: TargetFilename|endswith: \code_tunnel.json filter_main_legit_name: Image|endswith: - \code-tunnel.exe - \code.exe condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: high