Detection rules › Splunk
Dxcap Proxy Execution (Windows Event Log)
DXCap.exe is a command-line tool for graphics diagnostics capture and playback. It supports Direct3D 10 through Direct3D 12 across all feature levels. Local execution of a process as a subprocess of Dxcap.exe
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Stealth | T1218 System Binary Proxy Execution |
References
Event coverage
| Provider | Event | Title |
|---|---|---|
| Security-Auditing | Event ID 4688 | A new process has been created. |
Rule body yaml
id: '6583.7596'
title: Dxcap Proxy Execution
description: DXCap.exe is a command-line tool for graphics diagnostics capture and
playback. It supports Direct3D 10 through Direct3D 12 across all feature levels.
Local execution of a process as a subprocess of Dxcap.exe Living Off the Land Binary
and Scripts (LOLBAS) (LOLBIN)
logic_format: Splunk
logic: '`get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) OR
"<EventID>4688<" OR Type=process) "dxcap" | table _time, host, user user, process,
process_*, parent_* | bin span=1s | stats values(*) as * by _time, host | where
match(parent_process_name, "(?i)dxcap") OR match(process, "(?i)dxcap.+?\-c") '
techniques:
- defense-evasion:system binary proxy execution
technique_id:
- T1218
data_category:
- Windows event logs
references:
- https://lolbas-project.github.io/lolbas/OtherMSBinaries/Dxcap/
Stages and Predicates
Stage 1: search
`get_endpoint_data` `get_endpoint_data_winevent` (TERM(EventCode=4688) OR "<EventID>4688<" OR Type=process) "dxcap"
Stage 2: table
| table _time, host, user user, process, process_*, parent_*
Stage 3: bucket
| bin span=1s
Stage 4: stats
| stats values(*) as * by _time, host
Stage 5: where
| where match(parent_process_name, "(?i)dxcap") OR match(process, "(?i)dxcap.+?\-c")
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
EventCode | eq |
|
parent_process_name | match |
|
process | match |
|
Search terms
Bare-string tokens in the SPL search body. Splunk matches each token against _raw (the untyped raw event text) anywhere it appears, not against a specific field. These don't surface in the Indicators table because they aren't predicates on a known field.
| Stage | Term |
|---|---|
| 1 | TERM |
| 1 | "<EventID>4688<" |
| 1 | "dxcap" |