Query: detect Detects potentially suspicious file downloads from file sharing domains using PowerShell.exe in logs
Matching passage: Sigma rule: Detects potentially suspicious file downloads from file sharing domains using PowerShell.exe. Logsource: windows / process_creation. Rule: title: Potentially Suspicious File Download From File Sharing Domain Via PowerShell.EXE id: b6e04788-29e1-4557-bb14-77f761848ab8 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: 56454143-524f-49fb-b1c6-3fb8b1ad41fb 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 downloads from file sharing domains using PowerShell.exe references: - https://labs.withsecure.com/publications/fin7-target-veeam-servers - https://github.com/WithSecureLabs/iocs/blob/344203de742bb7e68bd56618f66d34be95a9f9fc/FIN7VEEAM/iocs.csv - 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.huntress.com/blog/slashandgrab-screen-connect-post-exploitation-in-the-wild-cve-2024-1709-cve-2024-1708 author: Nasreddine Bencherchali (Nextron Systems) date: 2024-02-23 modified: 2026-03-29 tags: - attack.execution logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \powershell.exe - \pwsh.exe - OriginalFileName: - PowerShell.EXE - pwsh.dll selection_websites: CommandLine|contains: - 0x0.st - anonfiles.com - bashupload.com - cdn.discordapp.com - chunk.io - ddns.net - dl.dropboxusercontent.com - ghostbin.co - 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_download: CommandLine|contains: - .DownloadString( - .DownloadFile( - 'Invoke-WebRequest ' - 'iwr ' - 'wget ' condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects suspicious DACL modifications to allow access to a service from a suspicious trustee. This can be used to overri. Logsource: windows / process_creation. Rule: title: Allow Service Access Using Security Descriptor Tampering Via Sc.EXE id: 6c8fbee5-dee8-49bc-851d-c3142d02aa47 related: - id: a537cfc3-4297-4789-92b5-345bfd845ad0 type: similar status: test description: Detects suspicious DACL modifications to allow access to a service from a suspicious trustee. This can be used to override access restrictions set by previous ACLs. references: - https://twitter.com/0gtweet/status/1628720819537936386 - https://itconnect.uw.edu/tools-services-support/it-systems-infrastructure/msinf/other-help/understanding-sddl-syntax/ - https://learn.microsoft.com/en-us/windows/win32/secauthz/sid-strings author: Nasreddine Bencherchali (Nextron Systems) date: 2023-02-28 modified: 2025-10-22 tags: - attack.privilege-escalation - attack.persistence - attack.t1543.003 logsource: category: process_creation product: windows detection: selection_sc: - Image|endswith: \sc.exe - OriginalFileName: sc.exe selection_sdset: CommandLine|contains|all: - sdset - A; selection_trustee: CommandLine|contains: - ;IU - ;SU - ;BA - ;SY - ;WD filter_optional_hexnode: ParentImage: C:\Hexnode\Hexnode Agent\Current\HexnodeAgent.exe condition: all of selection_* and not 1 of filter_optional_* falsepositives: - Unknown level: high