Query: Sigma rule for Detects potentially suspicious file downloads from file sharing domains using PowerShell.exe
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 default PsExec service filename which indicates PsExec service installation and execution. Logsource: windows / file_event. Rule: title: PsExec Service File Creation id: 259e5a6a-b8d2-4c38-86e2-26c5e651361d related: - id: 42c575ea-e41e-41f1-b248-8093c3e82a28 type: derived status: test description: Detects default PsExec service filename which indicates PsExec service installation and execution references: - https://www.jpcert.or.jp/english/pub/sr/ir_research.html - https://jpcertcc.github.io/ToolAnalysisResultSheet author: Thomas Patzke date: 2017-06-12 modified: 2022-10-26 tags: - attack.execution - attack.t1569.002 - attack.s0029 logsource: category: file_event product: windows detection: selection: TargetFilename|endswith: \PSEXESVC.exe condition: selection falsepositives: - Unknown level: low