Query: detect Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or fir in logs
Matching passage: Sigma rule: Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or fir. Logsource: windows / process_creation. Rule: title: PUA - Fast Reverse Proxy (FRP) Execution id: 32410e29-5f94-4568-b6a3-d91a8adad863 status: test description: Detects the use of Fast Reverse Proxy. frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the Internet. references: - https://asec.ahnlab.com/en/38156/ - https://github.com/fatedier/frp author: frack113, Florian Roth date: 2022-09-02 modified: 2024-11-23 tags: - attack.command-and-control - attack.t1090 logsource: category: process_creation product: windows detection: selection_img: Image|endswith: - \frpc.exe - \frps.exe selection_cli: CommandLine|contains: \frpc.ini selection_hashes: Hashes|contains: - MD5=7D9C233B8C9E3F0EA290D2B84593C842 - SHA1=06DDC9280E1F1810677935A2477012960905942F - SHA256=57B0936B8D336D8E981C169466A15A5FD21A7D5A2C7DAF62D5E142EE860E387C condition: 1 of selection_* falsepositives: - Legitimate use level: high
Near-miss passage: Sigma rule: Detects Set-Alias or New-Alias cmdlet usage. Which can be use as a mean to obfuscate PowerShell scripts. Logsource: windows / ps_script. Rule: title: Potential PowerShell Obfuscation Using Alias Cmdlets id: 96cd126d-f970-49c4-848a-da3a09f55c55 related: - id: e8314f79-564d-4f79-bc13-fbc0bf2660d8 type: derived status: test description: Detects Set-Alias or New-Alias cmdlet usage. Which can be use as a mean to obfuscate PowerShell scripts references: - https://github.com/1337Rin/Swag-PSO author: frack113 date: 2023-01-08 modified: 2025-10-22 tags: - attack.execution - attack.stealth - attack.t1027 - attack.t1059.001 logsource: product: windows category: ps_script definition: 'Requirements: Script Block Logging must be enabled' detection: selection: ScriptBlockText|contains: - 'Set-Alias ' - 'New-Alias ' filter_main_cim: ScriptBlockText: - Set-Alias -Name ncms -Value New-CimSession -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name gcls -Value Get-CimClass -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name ncso -Value New-CimSessionOption -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name gcms -Value Get-CimSession -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name rcms -Value Remove-cimSession -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name rcie -Value Register-CimIndicationEvent -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name gcai -Value Get-CimAssociatedInstance -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name gcim -Value Get-CimInstance -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name scim -Value Set-CimInstance -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name ncim -Value New-CimInstance -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name rcim -Value Remove-cimInstance -Option ReadOnly, AllScope -ErrorAction SilentlyContinue - Set-Alias -Name icim -Value Invoke-CimMethod -Option ReadOnly, AllScope -ErrorAction SilentlyContinue condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: low