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proc_creation_win_powershell_download_susp_file_sharing_domains.yml
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proc_creation_win_powershell_download_susp_file_sharing_domains.yml
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title: Potentially Suspicious File Download From File Sharing Domain Via PowerShell.EXE
id: b6e04788-29e1-4557-bb14-77f761848ab8
status: experimental
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
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:
# Note: You might want to baseline the github domain before including it
# - '.githubusercontent.com' # Includes both gists and github repositories / Michael Haag (idea).
- 'anonfiles.com'
- 'cdn.discordapp.com'
- 'cdn.discordapp.com/attachments/'
- 'ddns.net'
- 'dl.dropboxusercontent.com'
- 'ghostbin.co'
- 'glitch.me'
- 'gofile.io'
- 'hastebin.com'
- 'mediafire.com'
- 'mega.nz'
- 'onrender.com'
- 'paste.ee'
- 'pastebin.com'
- 'pastebin.pl'
- 'pastetext.net'
- 'privatlab.com'
- 'privatlab.net'
- 'send.exploit.in'
- 'sendspace.com'
- 'storage.googleapis.com'
- 'storjshare.io'
- 'supabase.co'
- 'temp.sh'
- 'transfer.sh'
- 'ufile.io'
selection_download:
CommandLine|contains:
- '.DownloadString('
- '.DownloadFile('
- 'Invoke-WebRequest '
- 'iwr '
- 'wget '
condition: all of selection_*
falsepositives:
- Unknown
level: high