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sigmahighHunting
Remote Server Service Abuse
Detects remote RPC calls to possibly abuse remote encryption service via MS-SRVS
Detection Query
selection:
EventLog: RPCFW
EventID: 3
InterfaceUuid: 4b324fc8-1670-01d3-1278-5a47bf6ee188
condition: selection
Author
Sagie Dulce, Dekel Paz
Created
2022-01-01
Data Sources
rpc_firewallapplication
Platforms
rpc_firewall
References
- https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-srvs/accf23b0-0f57-441c-9185-43041f1b0ee9
- https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-SRVS.md
- https://github.com/zeronetworks/rpcfirewall
- https://zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/
Tags
attack.lateral-movement
Raw Content
title: Remote Server Service Abuse
id: b6ea3cc7-542f-43ef-bbe4-980fbed444c7
status: test
description: Detects remote RPC calls to possibly abuse remote encryption service via MS-SRVS
references:
- https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-srvs/accf23b0-0f57-441c-9185-43041f1b0ee9
- https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-SRVS.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
tags:
- attack.lateral-movement
logsource:
product: rpc_firewall
category: application
definition: 'Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:4b324fc8-1670-01d3-1278-5a47bf6ee188'
detection:
selection:
EventLog: RPCFW
EventID: 3
InterfaceUuid: 4b324fc8-1670-01d3-1278-5a47bf6ee188
condition: selection
falsepositives:
- Legitimate remote share creation
level: high