Query: write Sigma 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 execution and usage of the DSInternals PowerShell module. Which can be used to perform what might be considered. Logsource: windows / process_creation. Rule: title: DSInternals Suspicious PowerShell Cmdlets id: 43d91656-a9b2-4541-b7e2-6a9bd3a13f4e related: - id: 846c7a87-8e14-4569-9d49-ecfd4276a01c type: similar status: test description: 'Detects execution and usage of the DSInternals PowerShell module. Which can be used to perform what might be considered as suspicious activity such as dumping DPAPI backup keys or manipulating NTDS.DIT files. The DSInternals PowerShell Module exposes several internal features of Active Directory and Azure Active Directory. These include FIDO2 and NGC key auditing, offline ntds.dit file manipulation, password auditing, DC recovery from IFM backups and password hash calculation. ' references: - https://github.com/MichaelGrafnetter/DSInternals/blob/39ee8a69bbdc1cfd12c9afdd7513b4788c4895d4/Src/DSInternals.PowerShell/DSInternals.psd1 author: Nasreddine Bencherchali (Nextron Systems), Nounou Mbeiri date: 2024-06-26 tags: - attack.execution - attack.t1059.001 logsource: product: windows category: process_creation detection: selection: CommandLine|contains: - Add-ADDBSidHistory - Add-ADNgcKey - Add-ADReplNgcKey - ConvertFrom-ADManagedPasswordBlob - ConvertFrom-GPPrefPassword - ConvertFrom-ManagedPasswordBlob - ConvertFrom-UnattendXmlPassword - ConvertFrom-UnicodePassword - ConvertTo-AADHash - ConvertTo-GPPrefPassword - ConvertTo-KerberosKey - ConvertTo-LMHash - ConvertTo-MsoPasswordHash - ConvertTo-NTHash - ConvertTo-OrgIdHash - ConvertTo-UnicodePassword - Disable-ADDBAccount - Enable-ADDBAccount - Get-ADDBAccount - Get-ADDBBackupKey - Get-ADDBDomainController - Get-ADDBGroupManagedServiceAccount - Get-ADDBKdsRootKey - Get-ADDBSchemaAttribute - Get-ADDBServiceAccount - Get-ADDefaultPasswordPolicy - Get-ADKeyCredential - Get-ADPasswordPolicy - Get-ADReplAccount - Get-ADReplBackupKey - Get-ADReplicationAccount - Get-ADSIAccount - Get-AzureADUserEx - Get-BootKey - Get-KeyCredential - Get-LsaBackupKey - Get-LsaPolicy - Get-SamPasswordPolicy - Get-SysKey - Get-SystemKey - New-ADDBRestoreFromMediaScript - New-ADKeyCredential - New-ADNgcKey - New-NTHashSet - Remove-ADDBObject - Save-DPAPIBlob - Set-ADAccountPasswordHash - Set-ADDBAccountPassword - Set-ADDBBootKey - Set-ADDBDomainController - Set-ADDBPrimaryGroup - Set-ADDBSysKey - Set-AzureADUserEx - Set-LsaPolicy - Set-SamAccountPasswordHash - Set-WinUserPasswordHash - Test-ADDBPasswordQuality - Test-ADPasswordQuality - Test-ADReplPasswordQuality - Test-PasswordQuality - Unlock-ADDBAccount - Write-ADNgcKey - Write-ADReplNgcKey condition: se