SharpHound Recon Account Discovery

Detects remote RPC calls useb by SharpHound to map remote connections and local group membership.

Sigma rule (View on GitHub)

 1title: SharpHound Recon Account Discovery
 2id: 65f77b1e-8e79-45bf-bb67-5988a8ce45a5
 3status: test
 4description: Detects remote RPC calls useb by SharpHound to map remote connections and local group membership.
 5references:
 6    - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wkst/55118c55-2122-4ef9-8664-0c1ff9e168f3
 7    - https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-WKST.md
 8    - https://github.com/zeronetworks/rpcfirewall
 9    - https://zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/
10author: Sagie Dulce, Dekel Paz
11date: 2022/01/01
12modified: 2022/01/01
13tags:
14    - attack.t1087
15    - attack.discovery
16logsource:
17    product: rpc_firewall
18    category: application
19    definition: 'Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:6bffd098-a112-3610-9833-46c3f87e345a opnum:2'
20detection:
21    selection:
22        EventLog: RPCFW
23        EventID: 3
24        InterfaceUuid: 6bffd098-a112-3610-9833-46c3f87e345a
25        OpNum: 2
26    condition: selection
27falsepositives:
28    - Unknown
29level: high

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