Remote Schedule Task Recon via ITaskSchedulerService

 1title: Remote Schedule Task Recon via ITaskSchedulerService
 2id: 7f7c49eb-2977-4ac8-8ab0-ab1bae14730e
 3status: test
 4description: Detects remote RPC calls to read information about scheduled tasks
 5references:
 6    - https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/d1058a28-7e02-4948-8b8d-4a347fa64931
 7    - https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-TSCH.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.discovery
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:86d35949-83c9-4044-b424-db363231fd0c"'
19detection:
20    selection:
21        EventLog: RPCFW
22        EventID: 3
23        InterfaceUuid: 86d35949-83c9-4044-b424-db363231fd0c
24    filter:
25        OpNum:
26            - 1
27            - 3
28            - 4
29            - 10
30            - 11
31            - 12
32            - 13
33            - 14
34            - 15
35    condition: selection and not filter
36falsepositives:
37    - Unknown
38level: high

References

• [MS-TSCH]: Task Scheduler Service Remoting Protocol

  

  Specifies the Task Scheduler Service Remoting Protocol, which is used to register and configure a task and to inquire about the status of tasks

  
  Read More

• MSRPC-to-ATTACK/documents/MS-TSCH.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

• Possible DCSync Attack
• Remote Event Log Recon
• Remote Registry Recon
• Remote Schedule Task Recon via AtScv
• SharpHound Recon Account Discovery