V 2.0 : Network Share Events

Vendor Documentation

https://docs.microsoft.com/en-us/windows/security/threat-protection/auditing/event-5140

Classification

Rule Name	Rule Type	Common Event	Classification
V 2.0 : Network Share Events	Base Rule	Network Share Information	Information
V 2.0 : EVID 5145 : Requested Permissions Allowed	Sub Rule	Permission Checked	Other Audit
V 2.0 : EVID 5145 : Requested Permissions Denied	Sub Rule	Permission Checked	Other Audit
V 2.0 : EVID 5140 : Successfull Access of Network	Sub Rule	Object Accessed	Access Success
V 2.0 : EVID 5140 : Failed Access of Network Share	Sub Rule	Access Object Failure	Access Failure
V 2.0 : EVID 5142 : Network Share Object Added	Sub Rule	Object Created	Access Success
V 2.0 : EVID 5143 : Network Share Object Modified	Sub Rule	Object Modified	Access Success
V 2.0 : EVID 5144 : Network Share Object Deleted	Sub Rule	Object Deleted/Removed	Access Success
V 2.0 : EVID 5140 : Succesfull Access of Network	Sub Rule	Object Accessed	Access Success
V 2.0 : EVID 5140 : Failed Access of Network Share	Sub Rule	Access Object Failure	Access Failure

Mapping with LogRhythm Schema

Device Key in Log Message	LogRhythm Schema	Data Type	Schema Description
Provider	N/A	N/A	Identifies the provider that logged the event. The Name and GUID attributes are included if the provider used an instrumentation manifest to define its events. The EventSourceName attribute is included if a legacy event provider (using the Event Logging API) logged the event.
EventID	<vmid>	Number	The identifier that the provider used to identify the event.
Version	N/A	N/A	The version number of the event's definition.
Level	<severity>	String/Number	The severity level defined in the event.
Task	<vendorinfo>	String/Number	The task defined in the event. Task and Opcode are typically used to identify the location in the application from where the event was logged.
Opcode	N/A	N/A	The opcode defined in the event. Task and Opcode are typically used to identify the location in the application from where the event was logged.
Keywords	<result> <tag1>	Text/String	A bitmask of the keywords defined in the event. Keywords are used to classify types of events (for example, events associated with reading data).
TimeCreated	N/A	N/A	The time stamp that identifies when the event was logged. The time stamp will include either the SystemTime attribute or the RawTime attribute.
EventRecordID	N/A	N/A	The record number assigned to the event when it was logged.
Correlation	N/A	N/A	The activity identifiers that consumers can use to group related events together.
Execution	N/A	N/A	Contains information about the process and thread that logged the event.
Channel	N/A	N/A	The channel to which the event was logged.
Computer	<dname>	Text/String	The name of the computer on which the event occurred.
SubjectUserSid	N/A	N/A	The SID of account that requested access to network share object.
SubjectUserName	<login>	N/A	The name of the account that requested access to network share object.
SubjectDomainName	<domainorigin>	Text/String	The subject’s domain or computer name. Formats vary, and include the following: Domain NETBIOS name example: CONTOSO Lowercase full domain name: contoso.local Uppercase full domain name: CONTOSO.LOCAL For some well-known security principals, such as LOCAL SERVICE or ANONYMOUS LOGON, the value of this field is NT AUTHORITY. For local user accounts, this field will contain the name of the computer or device that this account belongs to.
SubjectLogonId	<session>	Text/String	A hexadecimal value that can help you correlate this event with recent events that might contain the same Logon ID.
ObjectType	<objecttype>	Text/String	The type of an object that was accessed during the operation. Always File for this event.
IpAddress	<sip>	Number	The source IP address from which access was performed. IPv6 address or ::ffff:IPv4 address of a client. ::1 or 127.0.0.1 means localhost.
IpPort	<sport>	Number	The source TCP or UDP port which was used from remote or local machine to request the access. 0 for local access attempts.
ShareName	<objectname>	Text/String/Number	The name of accessed network share. The format is: \\*\SHARE_NAME.
ShareLocation	N/A	Text/String/Number	The full system (NTFS) path for accessed share. The format is: \\??\PATH. Can be empty, for example for Share Name: \\*\IPC$.
RelativeTargetName	<object>	Text/String/Number	relative name of the accessed target file or folder. This file-path is relative to the network share. If access was requested for the share itself, then this field appears as “\”.
AccessMask	N/A	N/A	The sum of hexadecimal values of requested access rights.
AccessList	<subject>	N/A	The list of access rights which were requested by Subject\Security ID.
AccessReason	N/A	N/A	The reason access rights were requested.