Query: detect Detects the use of various web request commands with commandline tools and Windows PowerShell cmdlets (including aliases in logs
Matching passage: Sigma rule: Detects the use of various web request commands with commandline tools and Windows PowerShell cmdlets (including aliases. Logsource: windows / process_creation. Rule: title: Usage Of Web Request Commands And Cmdlets id: 9fc51a3c-81b3-4fa7-b35f-7c02cf10fd2d related: - id: 1139d2e2-84b1-4226-b445-354492eba8ba type: similar - id: f67dbfce-93bc-440d-86ad-a95ae8858c90 type: obsolete - id: cd5c8085-4070-4e22-908d-a5b3342deb74 type: obsolete - id: 6e897651-f157-4d8f-aaeb-df8151488385 type: obsolete status: test description: Detects the use of various web request commands with commandline tools and Windows PowerShell cmdlets (including aliases) via CommandLine references: - https://4sysops.com/archives/use-powershell-to-download-a-file-with-http-https-and-ftp/ - https://blog.jourdant.me/post/3-ways-to-download-files-with-powershell - https://learn.microsoft.com/en-us/powershell/module/bitstransfer/add-bitsfile?view=windowsserver2019-ps author: James Pemberton / @4A616D6573, Endgame, JHasenbusch, oscd.community, Austin Songer @austinsonger date: 2019-10-24 modified: 2025-10-20 tags: - attack.execution - attack.t1059.001 logsource: category: process_creation product: windows detection: selection: CommandLine|contains: - '[System.Net.WebRequest]::create' - 'curl ' - Invoke-RestMethod - Invoke-WebRequest - ' irm ' - 'iwr ' - Resume-BitsTransfer - Start-BitsTransfer - 'wget ' - WinHttp.WinHttpRequest condition: selection falsepositives: - Use of Get-Command and Get-Help modules to reference Invoke-WebRequest and Start-BitsTransfer. level: medium
Near-miss passage: Sigma rule: Detects the use of MeshAgent to execute commands on the target host, particularly when threat actors might abuse it to e. Logsource: windows / process_creation. Rule: title: Remote Access Tool - MeshAgent Command Execution via MeshCentral id: 74a2b202-73e0-4693-9a3a-9d36146d0775 status: test description: 'Detects the use of MeshAgent to execute commands on the target host, particularly when threat actors might abuse it to execute commands directly. MeshAgent can execute commands on the target host by leveraging win-console to obscure their activities and win-dispatcher to run malicious code through IPC with child processes. ' references: - https://github.com/Ylianst/MeshAgent - https://github.com/Ylianst/MeshAgent/blob/52cf129ca43d64743181fbaf940e0b4ddb542a37/modules/win-dispatcher.js#L173 - https://github.com/Ylianst/MeshAgent/blob/52cf129ca43d64743181fbaf940e0b4ddb542a37/modules/win-info.js#L55 author: '@Kostastsale' date: 2024-09-22 tags: - attack.command-and-control - attack.t1219.002 logsource: product: windows category: process_creation detection: selection: ParentImage|endswith: \meshagent.exe Image|endswith: - \cmd.exe - \powershell.exe - \pwsh.exe condition: selection falsepositives: - False positives can be found in environments using MeshAgent for remote management, analysis should prioritize the grandparent process, MeshAgent.exe, and scrutinize the resulting child processes triggered by any suspicious interactive commands directed at the target host. level: medium