Radmin execution (Sysmon)

Group by: _time, host
Source: github.com/anvilogic-forge/armory

Adversaries may gain access to and use third-party software suites installed within an enterprise network, such as administration, monitoring, and deployment systems, to move laterally through the network. Radmin is a remote management software that can be used to remotely control workstations. Silence

MITRE ATT&CK coverage

Tactic	Techniques
Execution	`T1072` Software Deployment Tools
Lateral Movement	`T1072` Software Deployment Tools

References

https://www.group-ib.com/resources/threat-research/silence_moving-into-the-darkside.pdf

Telemetry coverage

Provider	Record / event type
Sysmon	Event ID 1: Process creation

Rule body

id: '8155.17236'
title: Radmin execution
description: Adversaries may gain access to and use third-party software suites installed
  within an enterprise network, such as administration, monitoring, and deployment
  systems, to move laterally through the network. Radmin is a remote management software
  that can be used to remotely control workstations. Silence Atomics T1072 Test#1
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_sysmon` (TERM(EventCode=1) OR "<EventID>1<")
  "radmin.exe" OR "/connect:*" | table _time, host, user process, process_*, signature_id,
  parent_* | bin span=1s | stats values(*) as * by _time, host | where match(process_name,
  "(?i)radmin") OR match(process, "(?i)\/connect\:.*?\:") '
techniques:
- execution:software deployment tools
- lateral-movement:software deployment tools
technique_id: 
- T1072
data_category:
- Windows Sysmon
references:
- https://www.group-ib.com/resources/threat-research/silence_moving-into-the-darkside.pdf

Stages and Predicates

Stage 1: `search`

`get_endpoint_data` `get_endpoint_data_sysmon` (TERM(EventCode=1) OR "<EventID>1<") "radmin.exe" OR "/connect:*"

Stage 2: `table`

| table _time, host, user process, process_*, signature_id, parent_*

Stage 3: `bucket`

| bin span=1s

Stage 4: `stats`

| stats values(*) as * by _time, host

Stage 5: `where`

| where match(process_name, "(?i)radmin") OR match(process, "(?i)\/connect\:.*?\:")

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`EventCode`	eq	`1` corpus 241 (splunk 225, kusto 15, elastic 1)	`field:"EventID" kind:eq value:"1"`
`process`	regex_match	`"(?i)\/connect\:.*?\:"` corpus 2 (splunk 2)	`field:"CommandLine" kind:regex_match`
`process_name`	regex_match	`"(?i)radmin"` corpus 2 (splunk 2)	`field:"process_name" kind:regex_match`

Search terms

These SPL tokens match against raw event text.

Stage	Term
1	`"<EventID>1<"`
1	`"radmin.exe"`
1	`"/connect:*"`