Query: alert when Detects the use of the Windows Update Client binary (wuauclt.exe) to proxy execute code and making network connections.
Matching passage: Sigma rule: Detects the use of the Windows Update Client binary (wuauclt.exe) to proxy execute code and making network connections.. Logsource: windows / network_connection. Rule: title: Potentially Suspicious Wuauclt Network Connection id: c649a6c7-cd8c-4a78-9c04-000fc76df954 status: test description: 'Detects the use of the Windows Update Client binary (wuauclt.exe) to proxy execute code and making network connections. One could easily make the DLL spawn a new process and inject to it to proxy the network connection and bypass this rule. ' references: - https://dtm.uk/wuauclt/ author: Roberto Rodriguez (Cyb3rWard0g), OTR (Open Threat Research) date: 2020-10-12 modified: 2024-03-12 tags: - attack.stealth - attack.t1218 logsource: category: network_connection product: windows definition: 'Requirements: The CommandLine field enrichment is required in order for this rule to be used.' detection: selection: Image|contains: wuauclt CommandLine|contains: ' /RunHandlerComServer' filter_main_ip: DestinationIp|cidr: - 127.0.0.0/8 - 10.0.0.0/8 - 169.254.0.0/16 - 172.16.0.0/12 - 192.168.0.0/16 - ::1/128 - fe80::/10 - fc00::/7 filter_main_msrange: DestinationIp|cidr: - 20.184.0.0/13 - 20.192.0.0/10 - 23.79.0.0/16 - 51.10.0.0/15 - 51.103.0.0/16 - 51.104.0.0/15 - 52.224.0.0/11 filter_main_uus: CommandLine|contains: - :\Windows\UUS\Packages\Preview\amd64\updatedeploy.dll /ClassId - :\Windows\UUS\amd64\UpdateDeploy.dll /ClassId filter_main_winsxs: CommandLine|contains|all: - :\Windows\WinSxS\ - '\UpdateDeploy.dll /ClassId ' filter_main_cli_null: CommandLine: null filter_main_cli_empty: CommandLine: '' condition: selection and not 1 of filter_main_* falsepositives: - Unknown level: medium
Near-miss passage: Sigma rule: Detects disabling security tools. Logsource: linux / process_creation. Rule: title: Disabling Security Tools id: e3a8a052-111f-4606-9aee-f28ebeb76776 status: test description: Detects disabling security tools references: - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1562.004/T1562.004.md author: Ömer Günal, Alejandro Ortuno, oscd.community date: 2020-06-17 modified: 2022-10-09 tags: - attack.defense-impairment - attack.t1686 logsource: category: process_creation product: linux detection: selection_iptables_1: Image|endswith: /service CommandLine|contains|all: - iptables - stop selection_iptables_2: Image|endswith: /service CommandLine|contains|all: - ip6tables - stop selection_iptables_3: Image|endswith: /chkconfig CommandLine|contains|all: - iptables - stop selection_iptables_4: Image|endswith: /chkconfig CommandLine|contains|all: - ip6tables - stop selection_firewall_1: Image|endswith: /systemctl CommandLine|contains|all: - firewalld - stop selection_firewall_2: Image|endswith: /systemctl CommandLine|contains|all: - firewalld - disable selection_carbonblack_1: Image|endswith: /service CommandLine|contains|all: - cbdaemon - stop selection_carbonblack_2: Image|endswith: /chkconfig CommandLine|contains|all: - cbdaemon - 'off' selection_carbonblack_3: Image|endswith: /systemctl CommandLine|contains|all: - cbdaemon - stop selection_carbonblack_4: Image|endswith: /systemctl CommandLine|contains|all: - cbdaemon - disable selection_selinux: Image|endswith: /setenforce CommandLine|contains: '0' selection_crowdstrike_1: Image|endswith: /systemctl CommandLine|contains|all: - stop - falcon-sensor selection_crowdstrike_2: Image|endswith: /systemctl CommandLine|contains|all: - disable - falcon-sensor condition: 1 of selection* falsepositives: - Legitimate administration activities level: medium