Query: rule covering Detects tampering of RDP Terminal Service/Server sensitive settings. Such as allowing unauthorized users access to a sys
Matching passage: Sigma rule: Detects tampering of RDP Terminal Service/Server sensitive settings. Such as allowing unauthorized users access to a sys. Logsource: windows / registry_set. Rule: title: RDP Sensitive Settings Changed id: 3f6b7b62-61aa-45db-96bd-9c31b36b653c related: - id: 171b67e1-74b4-460e-8d55-b331f3e32d67 type: obsolete - id: 41904ebe-d56c-4904-b9ad-7a77bdf154b3 type: obsolete - id: a2863fbc-d5cb-48d5-83fb-d976d4b1743b type: similar status: test description: 'Detects tampering of RDP Terminal Service/Server sensitive settings. Such as allowing unauthorized users access to a system via the ''fAllowUnsolicited'' or enabling RDP via ''fDenyTSConnections'', etc. Below is a list of registry keys/values that are monitored by this rule: - Shadow: Used to enable Remote Desktop shadowing, which allows an administrator to view or control a user''s session. - DisableRemoteDesktopAntiAlias: Disables anti-aliasing for remote desktop sessions. - DisableSecuritySettings: Disables certain security settings for Remote Desktop connections. - fAllowUnsolicited: Allows unsolicited remote assistance offers. - fAllowUnsolicitedFullControl: Allows unsolicited remote assistance offers with full control. - InitialProgram: Specifies a program to run automatically when a user logs on to a remote computer. - ServiceDll: Used in RDP hijacking techniques to specify a custom DLL to be loaded by the Terminal Services service. - SecurityLayer: Specifies the security layer used for RDP connections. ' references: - http://etutorials.org/Microsoft+Products/microsoft+windows+server+2003+terminal+services/Chapter+6+Registry/Registry+Keys+for+Terminal+Services/ - http://woshub.com/rds-shadow-how-to-connect-to-a-user-session-in-windows-server-2012-r2/ - https://admx.help/HKLM/SOFTWARE/Policies/Microsoft/Windows%20NT/Terminal%20Services - https://bazaar.abuse.ch/sample/6f3aa9362d72e806490a8abce245331030d1ab5ac77e400dd475748236a6cc81/ - https://blog.sekoia.io/darkgate-internals/ - https://blog.talosintelligence.com/understanding-the-phobos-affiliate-structure/ - https://github.com/redcanaryco/atomic-red-team/blob/02c7d02fe1f1feb0fc7944550408ea8224273994/atomics/T1112/T1112.md#atomic-test-63---disable-remote-desktop-anti-alias-setting-through-registry - https://github.com/redcanaryco/atomic-red-team/blob/02c7d02fe1f1feb0fc7944550408ea8224273994/atomics/T1112/T1112.md#atomic-test-64---disable-remote-desktop-security-settings-through-registry - https://github.com/redcanaryco/atomic-red-team/blob/dd526047b8c399c312fee47d1e6fb531164da54d/atomics/T1112/T1112.yaml#L790 - https://learn.microsoft.com/en-us/windows-hardware/customize/desktop/unattend/microsoft-windows-terminalser
Near-miss passage: Sigma rule: Detects attempts to disable Windows EventLog autologger sessions via registry modification. The AutoLogger event tracing. Logsource: windows / process_creation. Rule: title: Windows EventLog Autologger Session Registry Modification Via CommandLine id: d7b81144-b866-48a4-9bcc-275dc69d870e related: - id: f37b4bce-49d0-4087-9f5b-58bffda77316 type: similar status: experimental description: 'Detects attempts to disable Windows EventLog autologger sessions via registry modification. The AutoLogger event tracing session records events that occur early in the operating system boot process. Applications and device drivers can use the AutoLogger session to capture traces before the user logs in. Adversaries may disable these sessions to evade detection and prevent security monitoring of early boot activities and system events. ' references: - https://learn.microsoft.com/en-us/windows/win32/etw/configuring-and-starting-an-autologger-session - https://ptylu.github.io/content/report/report.html?report=25 - https://blog.palantir.com/tampering-with-windows-event-tracing-background-offense-and-defense-4be7ac62ac63 author: Swachchhanda Shrawan Poudel (Nextron Systems) date: 2025-12-25 tags: - attack.defense-impairment - attack.t1685.001 logsource: category: process_creation product: windows detection: selection_img: - Image|endswith: - \reg.exe - \powershell.exe - \pwsh.exe - OriginalFileName: - reg.exe - PowerShell.EXE - pwsh.dll selection_cli_action: CommandLine|contains: - 'add ' - Set-ItemProperty - New-ItemProperty - 'si ' selection_cli_base: CommandLine|contains: \Control\WMI\Autologger\ selection_cli_key: CommandLine|contains: - Start - Enabled condition: all of selection_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_autologger_session_registry_modification/info.yml simulation: - type: atomic-red-team name: Disable EventLog-Application Auto Logger Session Via Registry - Cmd technique: T1562.001 atomic_guid: 653c6e17-14a2-4849-851d-f1c0cc8ea9ab - type: atomic-red-team name: Disable EventLog-Application Auto Logger Session Via Registry - PowerShell technique: T1562.001 atomic_guid: da86f239-9bd3-4e85-92ed-4a94ef111a1c - type: atomic-red-team name: Disable EventLog-Application ETW Provider Via Registry - Cmd technique: T1562.001 atomic_guid: 1cac9b54-810e-495c-8aac-989e0076583b - type: atomic-red-team name: Disable EventLog-Application ETW Provider Via Registry - PowerShell technique: T1562.001 atomic_guid: 8f907648-1ebf-4276-b0f0-e2678ca474f0