Query: Sigma YAML for linux / process_creation
Matching passage: Sigma rule: Detects attempts to disable the Uncomplicated Firewall (UFW) on Linux systems. UFW is a popular firewall management tool. Logsource: linux / process_creation. Rule: title: UFW Disable Attempt id: 84c9e83c-599a-458a-a0cb-0ecce44e807a status: test description: 'Detects attempts to disable the Uncomplicated Firewall (UFW) on Linux systems. UFW is a popular firewall management tool that provides an easy-to-use interface for configuring firewall rules. Disabling UFW can leave a system vulnerable to attacks, as it may allow unauthorized access to network services and resources. ' references: - https://twitter.com/Joseliyo_Jstnk/status/1620131033474822144 - https://manpages.debian.org/unstable/ufw/ufw-framework.8.en.html - https://www.cyberciti.biz/faq/linux-disable-firewall-command/ author: Joseliyo Sanchez, @Joseliyo_Jstnk date: 2023-01-18 modified: 2026-05-04 tags: - attack.defense-impairment - attack.t1686 logsource: product: linux category: process_creation detection: selection_ufw_init: Image|endswith: /ufw-init CommandLine|contains: - ' force-stop' - ' stop' - ' flush' selection_ufw_disable: CommandLine|contains|all: - 'ufw ' - disable condition: 1 of selection_* falsepositives: - Legitimate actions by system administrators to disable UFW. level: medium
Near-miss passage: Sigma rule: Detects potentially suspicious file download from file sharing domains using curl.exe. Logsource: windows / process_creation. Rule: title: Suspicious File Download From File Sharing Domain Via Curl.EXE id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb related: - 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: 42a5f1e7-9603-4f6d-97ae-3f37d130d794 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 potentially suspicious file download from file sharing domains using curl.exe references: - https://labs.withsecure.com/publications/fin7-target-veeam-servers - https://github.com/WithSecureLabs/iocs/blob/344203de742bb7e68bd56618f66d34be95a9f9fc/FIN7VEEAM/iocs.csv author: Nasreddine Bencherchali (Nextron Systems) date: 2023-05-05 modified: 2026-03-29 tags: - attack.execution logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: \curl.exe - OriginalFileName: curl.exe selection_websites: 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 - pixeldrain.com - privatlab.com - privatlab.net - send.exploit.in - sendspace.com - storage.googleapis.com - storjshare.io - supabase.co - temp.sh - transfer.sh - trycloudflare.com - ufile.io - w3spaces.com - workers.dev - x0.at selection_http: CommandLine|contains: http selection_flag: CommandLine|contains: - ' -O' - --remote-name - --output selection_ext: CommandLine|endswith: - .ps1 - .ps1' - .ps1" - .dat - .dat' - .dat" - .msi - .msi' - .msi" - .bat - .bat' - .bat" - .exe - .exe' - .exe" - .vbs - .vbs' - .vbs" - .vbe - .vbe' - .vbe" - .hta - .hta' - .hta" - .dll - .dll' - .dll" - .psm1 - .psm1' - .psm1" condition: all of selection_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_curl_download_susp_file_sharing_domains/info.yml