Query: write Sigma for Detects the execution of a system command via the ScreenConnect RMM service.
Matching passage: Sigma rule: Detects the execution of a system command via the ScreenConnect RMM service.. Logsource: windows / process_creation. Rule: title: Remote Access Tool - ScreenConnect Remote Command Execution id: b1f73849-6329-4069-bc8f-78a604bb8b23 status: test description: Detects the execution of a system command via the ScreenConnect RMM service. references: - https://github.com/SigmaHQ/sigma/pull/4467 author: Ali Alwashali date: 2023-10-10 modified: 2024-02-26 tags: - attack.execution - attack.t1059.003 logsource: category: process_creation product: windows detection: selection_parent: ParentImage|endswith: \ScreenConnect.ClientService.exe selection_img: - Image|endswith: \cmd.exe - OriginalFileName: Cmd.Exe selection_cli: CommandLine|contains: \TEMP\ScreenConnect\ condition: all of selection_* falsepositives: - Legitimate use of ScreenConnect. Disable this rule if ScreenConnect is heavily used. level: low
Near-miss passage: Sigma rule: Detect modification of the User Shell Folders registry values for Startup or Common Startup which could indicate persist. Logsource: windows / registry_set. Rule: title: Modify User Shell Folders Startup Value id: 9c226817-8dc9-46c2-a58d-66655aafd7dc related: - id: 8f3ab69a-aa22-4943-aa58-e0a52fdf6818 type: similar status: test description: 'Detect modification of the User Shell Folders registry values for Startup or Common Startup which could indicate persistence attempts. Attackers may modify User Shell Folders registry keys to point to malicious executables or scripts that will be executed during startup. This technique is often used to maintain persistence on a compromised system by ensuring that the malicious payload is executed automatically. ' references: - https://github.com/redcanaryco/atomic-red-team/blob/9e5b12c4912c07562aec7500447b11fa3e17e254/atomics/T1547.001/T1547.001.md - https://www.welivesecurity.com/en/eset-research/muddywater-snakes-riverbank/ author: frack113, Swachchhanda Shrawan Poudel (Nextron Systems) date: 2022-10-01 modified: 2026-01-05 tags: - attack.persistence - attack.privilege-escalation - attack.t1547.001 logsource: product: windows category: registry_set detection: selection: TargetObject|contains: - SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders - SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders TargetObject|endswith: - \Common Startup - \Startup filter_main_details_null: Details: null filter_main_programdata_startup: Details|contains: - C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup - '%ProgramData%\Microsoft\Windows\Start Menu\Programs\Startup' filter_main_userprofile_startup_1: Details|contains: - '%USERPROFILE%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup' - '%%USERPROFILE%%\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup' filter_main_userprofile_startup_2: Details|contains|all: - C:\Users\ - \AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: high regression_tests_path: regression_data/rules/windows/registry/registry_set/registry_set_susp_user_shell_folders/info.yml simulation: - type: atomic-red-team name: Change Startup Folder - HKLM Modify User Shell Folders Common Startup Value technique: T1547.001 atomic_guid: acfef903-7662-447e-a391-9c91c2f00f7b