Remote Server Service Abuse for Lateral Movement

Detects remote RPC calls to possibly abuse remote encryption service via MS-EFSR

Sigma rule (View on GitHub)

 1title: Remote Server Service Abuse for Lateral Movement
 2id: 10018e73-06ec-46ec-8107-9172f1e04ff2
 3status: test
 4description: Detects remote RPC calls to possibly abuse remote encryption service via MS-EFSR
 5references:
 6    - https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-srvs/accf23b0-0f57-441c-9185-43041f1b0ee9
 7    - https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-SCMR.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.lateral_movement
15    - attack.t1569.002
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:367abb81-9844-35f1-ad32-98f038001003'
20detection:
21    selection:
22        EventLog: RPCFW
23        EventID: 3
24        InterfaceUuid: 367abb81-9844-35f1-ad32-98f038001003
25    condition: selection
26falsepositives:
27    - Administrative tasks on remote services
28level: high

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