Query: write Sigma for Detects the use of the "flock" command to execute a shell. Such behavior may be associated with privilege escalation, un
Matching passage: Sigma rule: Detects the use of the "flock" command to execute a shell. Such behavior may be associated with privilege escalation, un. Logsource: linux / process_creation. Rule: title: Shell Execution via Flock - Linux id: 4b09c71e-4269-4111-9cdd-107d8867f0cc status: test description: 'Detects the use of the "flock" command to execute a shell. Such behavior may be associated with privilege escalation, unauthorized command execution, or to break out from restricted environments. ' references: - https://gtfobins.github.io/gtfobins/flock/#shell - https://www.elastic.co/guide/en/security/current/linux-restricted-shell-breakout-via-linux-binary-s.html author: Li Ling, Andy Parkidomo, Robert Rakowski, Blake Hartstein (Bloomberg L.P.) date: 2024-09-02 tags: - attack.discovery - attack.t1083 logsource: category: process_creation product: linux detection: selection_img: Image|endswith: /flock CommandLine|contains: ' -u ' selection_cli: CommandLine|contains: - /bin/bash - /bin/dash - /bin/fish - /bin/sh - /bin/zsh condition: all of selection_* falsepositives: - Unknown level: high
Near-miss passage: Sigma rule: Detects raw disk access using uncommon tools or tools that are located in suspicious locations (heavy filtering is requi. Logsource: windows / raw_access_thread. Rule: title: Potential Defense Evasion Via Raw Disk Access By Uncommon Tools id: db809f10-56ce-4420-8c86-d6a7d793c79c status: test description: Detects raw disk access using uncommon tools or tools that are located in suspicious locations (heavy filtering is required), which could indicate possible defense evasion attempts references: - https://www.slideshare.net/heirhabarov/hunting-for-credentials-dumping-in-windows-environment author: Teymur Kheirkhabarov, oscd.community date: 2019-10-22 modified: 2025-12-03 tags: - attack.stealth - attack.t1006 logsource: product: windows category: raw_access_thread detection: filter_main_floppy: Device|contains: floppy filter_main_generic: Image|startswith: - C:\$WINDOWS.~BT\ - C:\Program Files (x86)\ - C:\Program Files\ - C:\Windows\CCM\ - C:\Windows\explorer.exe - C:\Windows\servicing\ - C:\Windows\SoftwareDistribution\ - C:\Windows\System32\ - C:\Windows\SystemApps\ - C:\Windows\SysWOW64\ - C:\Windows\uus\ - C:\Windows\WinSxS\ filter_main_system_images: Image: - Registry - System filter_main_windefender: Image|startswith: C:\ProgramData\Microsoft\Windows Defender\Platform\ Image|endswith: - \MsMpEng.exe - \MpDefenderCoreService.exe filter_main_microsoft_appdata: Image|startswith: C:\Users\ Image|contains|all: - \AppData\ - \Microsoft\ filter_main_ssd_nvme: Image|startswith: C:\Windows\Temp\ Image|endswith: - \Executables\SSDUpdate.exe - \HostMetadata\NVMEHostmetadata.exe filter_main_null: Image: null filter_main_systemsettings: Image: C:\Windows\ImmersiveControlPanel\SystemSettings.exe filter_main_update: Image|startswith: C:\$WinREAgent\Scratch\ filter_optional_github_desktop: Image|startswith: C:\Users\ Image|contains: \AppData\Local\GitHubDesktop\app- Image|endswith: \resources\app\git\mingw64\bin\git.exe filter_optional_nextron: Image|startswith: C:\Windows\Temp\asgard2-agent\ Image|endswith: \thor.exe filter_optional_Keybase: Image|startswith: C:\Users\ Image|contains: \AppData\Local\Keybase\upd.exe condition: not 1 of filter_main_* and not 1 of filter_optional_* falsepositives: - Likely level: low