Remote Server Service Abuse

 1title: Remote Server Service Abuse
 2id: b6ea3cc7-542f-43ef-bbe4-980fbed444c7
 3status: test
 4description: Detects remote RPC calls to possibly abuse remote encryption service via MS-SRVS
 5references:
 6    - https://docs.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-SRVS.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
15logsource:
16    product: rpc_firewall
17    category: application
18    definition: 'Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:4b324fc8-1670-01d3-1278-5a47bf6ee188'
19detection:
20    selection:
21        EventLog: RPCFW
22        EventID: 3
23        InterfaceUuid: 4b324fc8-1670-01d3-1278-5a47bf6ee188
24    condition: selection
25falsepositives:
26    - Legitimate remote share creation
27level: high

References

• [MS-SRVS]: Server Service Remote Protocol

  

  Specifies the Server Service Remote Protocol, which remotely enables file and printer sharing and named pipe access to the server through the

  
  Read More

• MSRPC-to-ATTACK/documents/MS-SRVS.md at ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3 · jsecurity101/MSRPC-to-ATTACK

  

  A repository that maps commonly used attacks using MSRPC protocols to ATT&CK - jsecurity101/MSRPC-to-ATTACK

  
  Read More

• GitHub - zeronetworks/rpcfirewall

  

  Contribute to zeronetworks/rpcfirewall development by creating an account on GitHub.

  
  Read More

• Stopping Lateral Movement via the RPC Firewall - Sagie Dulce

  

  RPC Firewall is a free & open source tool, which detects and protects against RPC based attacks used by ransomware for lateral movement and other attacks

  
  Read More

Related rules

• Remote DCOM/WMI Lateral Movement
• Remote Encrypting File System Abuse
• Remote Printing Abuse for Lateral Movement
• Remote Registry Lateral Movement
• Remote Schedule Task Lateral Movement via ATSvc