Query: Sigma rule for Detects usage of system utilities (only grep for now) to discover security software discovery
Matching passage: Sigma rule: Detects usage of system utilities (only grep for now) to discover security software discovery. Logsource: macos / process_creation. Rule: title: Security Software Discovery - MacOs id: 0ed75b9c-c73b-424d-9e7d-496cd565fbe0 status: test description: Detects usage of system utilities (only grep for now) to discover security software discovery references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1518.001/T1518.001.md author: Daniil Yugoslavskiy, oscd.community date: 2020-10-19 modified: 2022-11-27 tags: - attack.discovery - attack.t1518.001 logsource: category: process_creation product: macos detection: image: Image: /usr/bin/grep selection_cli_1: CommandLine|contains: - nessusd - santad - CbDefense - falcond - td-agent - packetbeat - filebeat - auditbeat - osqueryd - BlockBlock - LuLu selection_cli_2: CommandLine|contains|all: - Little - Snitch condition: image and 1 of selection_cli_* falsepositives: - Legitimate activities level: medium
Near-miss passage: Sigma rule: Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy executio. Logsource: windows / image_load. Rule: title: Unsigned DLL Loaded by Windows Utility id: b5de0c9a-6f19-43e0-af4e-55ad01f550af status: test description: 'Detects windows utilities loading an unsigned or untrusted DLL. Adversaries often abuse those programs to proxy execution of malicious code. ' references: - https://www.elastic.co/security-labs/Hunting-for-Suspicious-Windows-Libraries-for-Execution-and-Evasion - https://akhere.hashnode.dev/hunting-unsigned-dlls-using-kql - https://unit42.paloaltonetworks.com/unsigned-dlls/?web_view=true author: Swachchhanda Shrawan Poudel date: 2024-02-28 modified: 2025-10-07 tags: - attack.stealth - attack.t1218.011 - attack.t1218.010 logsource: product: windows category: image_load detection: selection: Image|endswith: - \InstallUtil.exe - \RegAsm.exe - \RegSvcs.exe - \regsvr32.exe - \rundll32.exe filter_main_signed: Signed: 'true' filter_main_sig_status: SignatureStatus: - errorChaining - errorCode_endpoint - errorExpired - trusted - Valid filter_main_signed_null: Signed: null filter_main_signed_empty: Signed: - '' - '-' filter_main_sig_status_null: SignatureStatus: null filter_main_sig_status_empty: SignatureStatus: - '' - '-' filter_main_windows_installer: Image: - C:\Windows\SysWOW64\rundll32.exe - C:\Windows\System32\rundll32.exe ImageLoaded|startswith: C:\Windows\Installer\ ImageLoaded|endswith: - .tmp-\Microsoft.Deployment.WindowsInstaller.dll - .tmp-\Avira.OE.Setup.CustomActions.dll filter_main_assembly: Image|startswith: - C:\Windows\SysWOW64\ - C:\Windows\System32\ - C:\Windows\Microsoft.NET\Framework64 Image|endswith: \RegAsm.exe ImageLoaded|endswith: .dll ImageLoaded|startswith: C:\Windows\assembly\NativeImages filter_optional_klite_codec: Image: - C:\Windows\SysWOW64\regsvr32.exe - C:\Windows\System32\regsvr32.exe ImageLoaded|startswith: - C:\Program Files (x86)\K-Lite Codec Pack\ - C:\Program Files\K-Lite Codec Pack\ condition: selection and not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Unknown level: medium