Browse Rules

VPCFlow Accepted Inbound SSH [snowflake-vpcflow]

This use case monitors inbound ssh connections over vpc flows. -- Threat Actor Association: Sandworm (UAC-0165)

Cisco SDWAN - Maleware Events

'This analytic rule will monitor Malware Events in Syslog and Netflow Data'

Cisco SDWAN - Monitor Critical IPs

'This analytic rule will monitor critical IPs in Syslog and Netflow Data.'

Cleartext Protocol Usage Via Netflow

Ensure that all account usernames and authentication credentials are transmitted across networks using encrypted channels Ensure that an encryption is used for all sensitive information in transit. Ensure that an encrypted channels is used for all administrative account access.

SMB Write Request - NamedPipes

An SMB write can be an indicator of lateral movement, especially when combined with other information such as execution of that written file. Named pipes are a subset of SMB write requests. Named pipes such as msftewds may not be alarming; however others, such as lsarpc, may. Monitoring SMB write requests still creates some noise, particulary with named pipes. As a result, SMB is now split between writing named pipes and writing other files.

RPC Activity

Microsoft Windows uses its implementation of [Distributed Computing Environment/Remote Procedure Call](https://en.wikipedia.org/wiki/DCE/RPC) (DCE/RPC), which it calls [Microsoft RPC](https://en.wikipedia.org/wiki/Microsoft_RPC), to call certain APIs remotely. A Remote Procedure Call is initiated by communicating to the RPC Endpoint Mapper, which exists as the Windows service RpcEptMapper and listens on the port 135/tcp. The endpoint mapper resolves a requested endpoint/interface and responds t

User Login Activity Monitoring

Monitoring logon and logoff events for hosts on the network is very important for situational awareness. This information can be used as an indicator of unusual activity as well as to corroborate activity seen elsewhere. Could be applied to a number of different types of monitoring depending on what information is desired. Some use cases include monitoring for all remote connections and building login timelines for users. Logon events are Windows Event Code 4624 for Windows Vista and above, 518

SMB Write Request

As described in [CAR-2013-01-003](../CAR-2013-01-003), SMB provides a means of remotely managing a file system. Adversaries often use SMB to move laterally to a host. SMB is commonly used to upload files. It may be used for staging in [Exfiltration](https://attack.mitre.org/tactics/TA0010) or as a [Lateral Movement](https://attack.mitre.org/tactics/TA0008) technique. Unlike SMB Reads, SMB Write requests typically require an additional level of access, resulting in less activity. Focusing on SMB

Windows Remote Management (WinRM)

When a [Windows Remote Management](https://attack.mitre.org/techniques/T1021/006) connection is opened, the client sends HTTP requests to port 5985 for HTTP or 5986 for HTTPS on the target host. Each HTTP(S) request to the URI "/wsman" is called, and other information is set in the headers. Depending on the operation, the HTTP method may vary (i.e., GET, POST, etc.). This analytic would detect Remote PowerShell, as well as other communications that rely on WinRM. Additionally, it outputs the exe