Query: rule covering 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 when an access policy that is applied to a GCP cloud resource is deleted. An adversary would be able to remove a. Logsource: gcp / gcp.audit. Rule: title: GCP Access Policy Deleted id: 32438676-1dba-4ac7-bf69-b86cba995e05 status: test description: 'Detects when an access policy that is applied to a GCP cloud resource is deleted. An adversary would be able to remove access policies to gain access to a GCP cloud resource. ' references: - https://cloud.google.com/access-context-manager/docs/audit-logging - https://cloud.google.com/logging/docs/audit/understanding-audit-logs - https://cloud.google.com/logging/docs/reference/audit/auditlog/rest/Shared.Types/AuditLog author: Bryan Lim date: 2024-01-12 tags: - attack.persistence - attack.privilege-escalation - attack.t1098 logsource: product: gcp service: gcp.audit detection: selection: data.protoPayload.authorizationInfo.permission: - accesscontextmanager.accessPolicies.delete - accesscontextmanager.accessPolicies.accessLevels.delete - accesscontextmanager.accessPolicies.accessZones.delete - accesscontextmanager.accessPolicies.authorizedOrgsDescs.delete data.protoPayload.authorizationInfo.granted: 'true' data.protoPayload.serviceName: accesscontextmanager.googleapis.com condition: selection falsepositives: - Legitimate administrative activities level: medium