Query: detect Detects a network connection initiated by programs or processes running from suspicious or uncommon files system locatio in logs
Matching passage: Sigma rule: Detects a network connection initiated by programs or processes running from suspicious or uncommon files system locatio. Logsource: windows / network_connection. Rule: title: Network Connection Initiated From Process Located In Potentially Suspicious Or Uncommon Location id: 7b434893-c57d-4f41-908d-6a17bf1ae98f 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: 8518ed3d-f7c9-4601-a26c-f361a4256a0c type: similar - id: 42a5f1e7-9603-4f6d-97ae-3f37d130d794 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 a network connection initiated by programs or processes running from suspicious or uncommon files system locations. ' references: - https://docs.google.com/spreadsheets/d/17pSTDNpa0sf6pHeRhusvWG6rThciE8CsXTSlDUAZDyo author: Florian Roth (Nextron Systems), Nasreddine Bencherchali (Nextron Systems) date: 2017-03-19 modified: 2026-03-29 tags: - attack.command-and-control - attack.t1105 logsource: category: network_connection product: windows detection: selection: Initiated: 'true' Image|contains: - :\$Recycle.bin - :\Perflogs\ - :\Temp\ - :\Users\Default\ - :\Users\Public\ - :\Windows\Fonts\ - :\Windows\IME\ - :\Windows\System32\Tasks\ - :\Windows\Tasks\ - \config\systemprofile\ - \Contacts\ - \Favorites\ - \Favourites\ - \Music\ - \Pictures\ - \Videos\ - \Windows\addins\ filter_main_domains: DestinationHostname|endswith: - .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.co.nz - mega.nz - onrender.com - pages.dev - paste.ee - pastebin.com - pastebin.pl - pastetext.net - portmap.io - 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 condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects the execution of "reg.exe" to alter registry keys that would replace the user's desktop background. This is a co. Logsource: windows / process_creation. Rule: title: Potentially Suspicious Desktop Background Change Using Reg.EXE id: 8cbc9475-8d05-4e27-9c32-df960716c701 related: - id: 85b88e05-dadc-430b-8a9e-53ff1cd30aae type: similar status: test description: 'Detects the execution of "reg.exe" to alter registry keys that would replace the user''s desktop background. This is a common technique used by malware to change the desktop background to a ransom note or other image. ' references: - https://www.attackiq.com/2023/09/20/emulating-rhysida/ - https://research.checkpoint.com/2023/the-rhysida-ransomware-activity-analysis-and-ties-to-vice-society/ - https://www.trendmicro.com/en_us/research/23/h/an-overview-of-the-new-rhysida-ransomware.html - https://www.virustotal.com/gui/file/a864282fea5a536510ae86c77ce46f7827687783628e4f2ceb5bf2c41b8cd3c6/behavior - https://admx.help/?Category=Windows_10_2016&Policy=Microsoft.Policies.WindowsDesktop::Wallpaper - https://admx.help/?Category=Windows_10_2016&Policy=Microsoft.Policies.ControlPanelDisplay::CPL_Personalization_NoDesktopBackgroundUI author: Stephen Lincoln @slincoln-aiq (AttackIQ) date: 2023-12-21 tags: - attack.persistence - attack.impact - attack.defense-impairment - attack.t1112 - attack.t1491.001 logsource: product: windows category: process_creation detection: selection_reg_img: - Image|endswith: \reg.exe - OriginalFileName: reg.exe selection_reg_flag: CommandLine|contains: add selection_keys: CommandLine|contains: - Control Panel\Desktop - CurrentVersion\Policies\ActiveDesktop - CurrentVersion\Policies\System selection_cli_reg_1: CommandLine|contains|all: - /v NoChangingWallpaper - /d 1 selection_cli_reg_2: CommandLine|contains|all: - /v Wallpaper - /t REG_SZ selection_cli_reg_3: CommandLine|contains|all: - /v WallpaperStyle - /d 2 condition: all of selection_reg_* and selection_keys and 1 of selection_cli_reg_* falsepositives: - Administrative scripts that change the desktop background to a company logo or other image. level: medium