SharpHound Recon Account Discovery

Title: SharpHound Recon Account Discovery
Status: test
Description:Detects remote RPC calls useb by SharpHound to map remote connections and local group membership.
References:
  -https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wkst/55118c55-2122-4ef9-8664-0c1ff9e168f3
  -https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-WKST.md
  -https://github.com/zeronetworks/rpcfirewall
  -https://zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/
Author: Sagie Dulce, Dekel Paz
Date: 2022-01-01
modified:None
Tags:

• -'attack.t1087'
• -'attack.discovery'

Logsource:

• product: rpc_firewall
• category: application
• definition: Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:6bffd098-a112-3610-9833-46c3f87e345a opnum:2

Detection:
  selection:
    EventLog: 'RPCFW'
    EventID: '3'
    InterfaceUuid: '6bffd098-a112-3610-9833-46c3f87e345a'
    OpNum: '2'
  condition:selection
Falsepositives:
  -Unknown
Level: high