Elastic low stable kql
Deprecated - PowerShell Script with Discovery Capabilities
Identifies the use of Cmdlets and methods related to discovery activities. Attackers can use these to perform various situational awareness related activities, like enumerating users, shares, sessions, domain trusts, groups, etc.
Detection Logic
event.category:process and host.os.type:windows and
powershell.file.script_block_text : (
(
"Get-ADDefaultDomainPasswordPolicy" or
"Get-ADDomain" or "Get-ComputerInfo" or
"Get-Disk" or "Get-DnsClientCache" or
"Get-GPOReport" or "Get-HotFix" or
"Get-LocalUser" or "Get-NetFirewallProfile" or
"get-nettcpconnection" or "Get-NetAdapter" or
"Get-PhysicalDisk" or "Get-Process" or
"Get-PSDrive" or "Get-Service" or
"Get-SmbShare" or "Get-WinEvent"
) or
(
("Get-WmiObject" or "gwmi" or "Get-CimInstance" or
"gcim" or "Management.ManagementObjectSearcher" or
"System.Management.ManagementClass" or
"[WmiClass]") and
(
"AntiVirusProduct" or "CIM_BIOSElement" or "CIM_ComputerSystem" or "CIM_Product" or "CIM_DiskDrive" or
"CIM_LogicalDisk" or "CIM_NetworkAdapter" or "CIM_StorageVolume" or "CIM_OperatingSystem" or
"CIM_Process" or "CIM_Service" or "MSFT_DNSClientCache" or "Win32_BIOS" or "Win32_ComputerSystem" or
"Win32_ComputerSystemProduct" or "Win32_DiskDrive" or "win32_environment" or "Win32_Group" or
"Win32_groupuser" or "Win32_IP4RouteTable" or "Win32_logicaldisk" or "Win32_MappedLogicalDisk" or
"Win32_NetworkAdapterConfiguration" or "win32_ntdomain" or "Win32_OperatingSystem" or
"Win32_PnPEntity" or "Win32_Process" or "Win32_Product" or "Win32_quickfixengineering" or
"win32_service" or "Win32_Share" or "Win32_UserAccount"
)
) or
(
("ADSI" and "WinNT") or
("Get-ChildItem" and "sysmondrv.sys") or
("::GetIPGlobalProperties()" and "GetActiveTcpConnections()") or
("ServiceProcess.ServiceController" and "::GetServices") or
("Diagnostics.Process" and "::GetProcesses") or
("DirectoryServices.Protocols.GroupPolicy" and ".GetGPOReport()") or
("DirectoryServices.AccountManagement" and "PrincipalSearcher") or
("NetFwTypeLib.NetFwMgr" and "CurrentProfile") or
("NetworkInformation.NetworkInterface" and "GetAllNetworkInterfaces") or
("Automation.PSDriveInfo") or
("Microsoft.Win32.RegistryHive")
) or
(
"Get-ItemProperty" and
(
"\Control\SecurityProviders\WDigest" or
"\microsoft\windows\currentversion\explorer\runmru" or
"\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters" or
"\Microsoft\Windows\CurrentVersion\Uninstall" or
"\Microsoft\Windows\WindowsUpdate" or
"Policies\Microsoft\Windows\Installer" or
"Software\Microsoft\Windows\CurrentVersion\Policies" or
("\Services\SharedAccess\Parameters\FirewallPolicy" and "EnableFirewall") or
("Microsoft\Windows\CurrentVersion\Internet Settings" and "proxyEnable")
)
) or
(
("Directoryservices.Activedirectory" or
"DirectoryServices.AccountManagement") and
(
"Domain Admins" or "DomainControllers" or
"FindAllGlobalCatalogs" or "GetAllTrustRelationships" or
"GetCurrentDomain" or "GetCurrentForest"
) or
"DirectoryServices.DirectorySearcher" and
(
"samAccountType=805306368" or
"samAccountType=805306369" or
"objectCategory=group" or
"objectCategory=groupPolicyContainer" or
"objectCategory=site" or
"objectCategory=subnet" or
"objectClass=trustedDomain"
)
) or
(
"Get-Process" and
(
"mcshield" or "windefend" or "savservice" or
"TMCCSF" or "symantec antivirus" or
"CSFalcon" or "TmPfw" or "kvoop"
)
)
) and
not powershell.file.script_block_text : (
(
"__cmdletization_BindCommonParameters" and
"Microsoft.PowerShell.Core\Export-ModuleMember" and
"Microsoft.PowerShell.Cmdletization.Cim.CimCmdletAdapter"
) or
"CmdletsToExport=@(\"Add-Content\"," or
("cmdletization" and "cdxml-Help.xml")
) and
not user.id : ("S-1-5-18" or "S-1-5-19" or "S-1-5-20") Field Validations
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