killchain-compendium/misc/threat_intelligence/osquery.md

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# Osquery
* [Documentation](https://osquery.readthedocs.io/en/stable/)
* [Schema Docs](https://osquery.io/schema/5.5.1/)
## Usage
* `osqueryi .help` is the overiew
### List available tables
List an overview of all available topics which can be queried.
```sh
.tables
```
* Specify via `.tables <tablename>`
### Show schema
```sh
.schema <table_name>
```
* Show schema for foreign operating systems via `--enable_foreign`
### Queries
* Select
```sql
select * from <table>;
select * <attr>,<attr> from <table>;
```
* UPDATE and DELETE is possible on run-time tables
* JOIN
```sql
SELECT pid, name, path FROM osquery_info JOIN processes USING (pid);
```
* Where
```sql
select * from programs where name = 'paint';
```
* Where clause operators
* `=` [equal]
* `<>` [not equal]
* `>, >=` [greater than, greater than or equal to]
* `<, <=` [less than or less than or equal to]
* `BETWEEN` [between a range]
* `LIKE` [pattern wildcard searches]
* `%` [wildcard, multiple characters]
* `_` [wildcard, one character]
* Matching wildcard rules
* `%`: Match all files and folders for one level.
* `%%`: Match all files and folders recursively.
* `%abc`: Match all within-level ending in "abc".
* `abc%`: Match all within-level starting with "abc".
* Table 'userassist' stores executed processes
## Modes
There are multiple modes to select from to show the data
```sh
osqueryi
osqueryi> .mode .help
```
## Remote Queries via Frontend
* [Repo](https://github.com/fleetdm/fleet.git)
## Extensions
* [osquery-extensions](https://github.com/trailofbits/osquery-extensions)
* [osq-ext-bin](https://github.com/polylogyx/osq-ext-bin)
### Yara
```sql
select * from yara where sigfile='<sigfile>' and path like '/home/%%';
```
* [Docs](https://osquery.readthedocs.io/en/stable/deployment/yara/)