Sigma rule: Recon Activity via SASec
A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-dc56ee8d06ef, updated 2022-01-01T00:00:00.000Z.
Rule
- Title
- Recon Activity via SASec
- Status
- test
- Level
- high
- Author
- Sagie Dulce, Dekel Paz
- Date
- 2022-01-01
- File
- rules/application/rpc_firewall/rpc_firewall_sasec_recon.yml
- Commit
- ccbb0369507f796db0b0ae6854c8a2be471b9d84
Detects remote RPC calls to read information about scheduled tasks via SASec
Log source
- product
- rpc_firewall
- category
- application
- definition
- Requirements: install and apply the RPC Firewall to all processes with "audit:true action:block uuid:378e52b0-c0a9-11cf-822d-00aa0051e40f"
Detection
selection:
EventLog: RPCFW
EventID: 3
InterfaceUuid: 378e52b0-c0a9-11cf-822d-00aa0051e40f
filter:
OpNum:
- 0
- 1
condition: selection and not filterFalse positives (as the rule lists them)
- Unknown
Tags
- attack.discovery
References
- https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-tsch/d1058a28-7e02-4948-8b8d-4a347fa64931
- https://github.com/jsecurity101/MSRPC-to-ATTACK/blob/ddd4608fe8684fcf2fcf9b48c5f0b3c28097f8a3/documents/MS-TSCH.md
- https://github.com/zeronetworks/rpcfirewall
- https://zeronetworks.com/blog/stopping-lateral-movement-via-the-rpc-firewall/
Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/application/rpc_firewall/rpc_firewall_sasec_recon.yml
Sources and licences
SigmaHQ
"Recon Activity via SASec" by Sagie Dulce, Dekel Paz (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/application/rpc_firewall/rpc_firewall_sasec_recon.yml.
Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License
Cite this page
Dragons Eye Ransomware Tracker, "Sigma rule: Recon Activity via SASec",
entity page, dataset version ref-dc56ee8d06ef, updated 2022-01-01T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0a3ff354-93fc-4273-8a03-1078782de5b7 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0a3ff354-93fc-4273-8a03-1078782de5b7, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.