Detection rules › Splunk
System Information Discovery - Windows (Sysmon)
An adversary may attempt to get detailed information about the operating system and hardware, including version, patches, hotfixes, service packs, and architecture. Adversaries may use the information from System Information Discovery during automated discovery to shape follow-on behaviors, including whether or not the adversary fully infects the target and/or attempts specific actions
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Discovery |
References
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
Rule body
id: '16900.27387'
title: System Information Discovery - Windows
description: 'An adversary may attempt to get detailed information about the operating
system and hardware, including version, patches, hotfixes, service packs, and architecture.
Adversaries may use the information from System Information Discovery during automated
discovery to shape follow-on behaviors, including whether or not the adversary fully
infects the target and/or attempts specific actions. Atomics T1082 Test #1 Atomics
T1082 Test #6 Atomics T1082 Test #8 Atomics T1082 Test #10'
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_sysmon` (TERM(EventCode=1) OR "<EventID>1<")
(TERM(systeminfo) OR TERM(set) OR TERM(hostname) OR (TERM(reg) TERM(query) ("HKLM\SYSTEM\CurrentControlSet"
OR "MachineGuid"))) | regex process ="(?i)(\s+|^)(systeminfo|reg\s+query|hostname|set)(\.exe)?(\s+|$)"
| table _time, host, user, process, process_*, parent_process* | bin span=1s | stats
values(*) as * by _time, host '
techniques:
- discovery:system information discovery
technique_id:
- T1082
data_category:
- Windows Sysmon
- Process command-line parameters
references:
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1082/T1082.md
Stages and Predicates
Stage 1: search
`get_endpoint_data` `get_endpoint_data_sysmon` (TERM(EventCode=1) OR "<EventID>1<") (TERM(systeminfo) OR TERM(set) OR TERM(hostname) OR (TERM(reg) TERM(query) ("HKLM\SYSTEM\CurrentControlSet" OR "MachineGuid")))
Stage 2: regex
| regex process ="(?i)(\s+|^)(systeminfo|reg\s+query|hostname|set)(\.exe)?(\s+|$)"
Stage 3: table
| table _time, host, user, process, process_*, parent_process*
Stage 4: bucket
| bin span=1s
Stage 5: stats
| stats values(*) as * by _time, host
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
EventCode | eq |
| field:"EventID" kind:eq value:"1" |
process | regex_match |
| field:"CommandLine" kind:regex_match |
Search terms
These SPL tokens match against raw event text.
| Stage | Term |
|---|---|
| 1 | "<EventID>1<" |
| 1 | systeminfo |
| 1 | set |
| 1 | hostname |
| 1 | reg |
| 1 | query |
| 1 | "HKLM\SYSTEM\CurrentControlSet" |
| 1 | "MachineGuid" |