This Python library is a simple abstraction to the LimaCharlie.io REST API.
For more information on LimaCharlie.io: https://limacharlie.io.
- Python API Doc: https://python-limacharlie.readthedocs.io/en/latest/
- General LimaCharlie Doc: https://doc.limacharlie.io/
- REST API: https://api.limacharlie.io
The Python API uses the LimaCharlie.io REST API. The REST API currently supports many more functions. If the Python is missing a function available in the REST API that you would like to use, let us know at support@limacharlie.io.
pip install limacharlie
Authenticating to use the SDK / CLI can be done in a few ways.
The simplest is to login to an organization using an API key.
Use limacharlie login to store credentials locally. You will need an OID (Organization ID) and an API key, both
of which you can get from the "REST API" section of the web interface.
The login interface supports named environments, or a default one used when no environment is selected.
To list available environments: limacharlie use.
Setting a given environment in the current shell session can be done like: . <(limacharlie use dev-org).
You can also specify a UID (User ID) during login to use a user API key representing
the total set of permissions that user has (see User Profile in the web interface).
You can use the LC_OID and LC_API_KEY and LC_UID environment variables to replace
the values used logging in. The environment variables will be used if no other credentials
are specified.
The root of the functionality in the SDK is from the Manager object. It holds the crendentials
and is tied to a specific Organization.
You can authenticate the Manager using an oid (and optionally a uid), along with either
a secret_api_key or jwt directly. Alternatively you can just use an environment name (as specified
in limacharlie login). If no creds are provided, the Manager will try to use the default environment
and credentials.
import limacharlie
YARA_SIG = 'https://raw.githubusercontent.com/Yara-Rules/rules/master/Malicious_Documents/Maldoc_PDF.yar'
# Create an instance of the SDK.
man = limacharlie.Manager()
# Get a list of all the sensors in the current Organization.
all_sensors = man.sensors()
# Select the first sensor in the list.
sensor = all_sensors[ 0 ]
# Tag this sensor with a tag for 10 minutes.
sensor.tag( 'suspicious', ttl = 60 * 10 )
# Send a task to the sensor (unidirectionally, not expecting a response).
sensor.task( 'os_processes' )
# Send a yara scan to that sensor for processes "evil.exe".
sensor.task( 'yara_scan -e *evil.exe ' + YARA_SIG )Note that the SDK uses the gevent package which sometimes has issues with other
packages that operate at a low level in python. For example, Jupyter notebooks
may see freezing on importing limacharlie and require a tweak to load:
{
"display_name": "IPython 2 w/gevent",
"language": "python",
"argv": [
"python",
"-c", "from gevent.monkey import patch_all; patch_all(thread=False); from ipykernel.kernelapp import main; main()",
"-f",
"{connection_file}"
]
}This is a the general component that provides access to the managing functions of the API like querying sensors online, creating and removing Outputs etc.
The Firehose is a simple object that listens on a port for LimaCharlie.io data.
Under the hood it creates a Syslog Output on limacharlie.io pointing to itself
and removes it on shutdown. Data from limacharlie.io is added to firehose.queue
(a gevent Queue) as it is received.
It is a basic building block of automation for limacharlie.io.
Much like the Firehose, the Spout receives data from LimaCharlie.io, the difference
is that the Spout does not require opening a local port to listen actively on. Instead
it leverages stream.limacharlie.io to receive the data stream over HTTPS.
A Spout is automatically created when you instantiate a Manager with the
is_interactive = True and inv_id = XXXX arguments in order to provide real-time
feedback from tasking sensors.
This is the object returned by manager.sensor( sensor_id ).
It supports a task, hostname, tag, untag, getTags and more functions. This
is the main way to interact with a specific sensor.
The task function sends a task to the sensor unidirectionally, meaning it does not
receive the response from the sensor (if any). If you want to interact with a sensor
in real-time, use the interactive mode (as mentioned in the Spout) and use either
the request function to receive replies through a FutureResults object or the
simpleRequest to wait for the response and receive it as a return value.
The Artifacts is a helpful class to upload Artifact Collection
to LimaCharlie without going through a sensor.
The Payloads can be used to manage various executable payloads
accessible to sensors.
The Replay object allows you to interact with Replay
jobs managed by LimaCharlie. These allow you to re-run D&R Rules
on historical data.
The Search object allows you to perform an IOC search across multiple organizations.
The SpotCheck object (sometimes called Fleet Check) allows you to manage an active (query sensors directly
as opposed to searching on indexed historical data) search for various IOCs on an organization's sensors.
The Configs is used to retrieve an organization's configuration as a config file, or apply
an existing config file to an organization. This is the concept of Infrastructure As Code.
The Webhook object demonstrates handling webhooks emited by the LimaCharlie cloud, including
verifying the shared-secret signing of the webhooks.
- Basic Manager Operations
- Basic Firehose Operations
- Basic Spout Operations
- Basic Integrated Operations
- Rules Config Syncing
Many of the objects available as part of the LimaCharlie Python SDK also support various command line interfaces.
python -m limacharlie.Firehose 1.2.3.4:9424 event -n firehose_test -t fh_test --oid c82e5c17-d519-4ef5-a4ac-caa4a95d31ca
Listens on interface 1.2.3.4, port 9424 for incoming connections from LimaCharlie.io.
Receives only events from hosts tagged with fh_test.
python -m limacharlie.Spout event --oid c82e5c17-d519-4ef5-a4ac-caa4a95d31ca
Behaves similarly to the Firehose, but instead of listenning from an internet accessible port, it
connects to the stream.limacharlie.io service to stream the output over HTTPS. This means the Spout
allows you to get ad-hoc output like the Firehose, but it also works through NATs and proxies.
It is MUCH more convenient for short term ad-hoc outputs, but it is less reliable than a Firehose for very large amounts of data.
limacharlie configs fetch --oid c82e5c17-d519-4ef5-a4ac-c454a95d31ca
limacharlie configs push --dry-run --oid c82e5c17-d519-4ef5-a4ac-c454a95d31ca
The fetch command will get a list of the Detection & Response rules in your
organization and will write them to the config file specified or the default
config file lc_conf.yaml in YAML format.
Then push can upload the rules specified in the config file (or the default one)
to your organization. The optional --force argument will remove active rules not
found in the config file. The --dry-run simulates the sync and displayes the changes
that would occur.
The --config allows you to specify an alternate config file and the --api-key allows
you to specify a file on disk where the API should be read from (otherwise, of if - is
specified as a file, the API Key is read from STDIN).
All these capabilities are also supported directly by the limacharlie.Configs object.
The Sync functionality currently supports all common useful configurations. The --no-rules and
--no-outputs flags can be used to ignore one or the other in config files and sync. Additional
flags are also supported, see limacharlie configs --help.
To understand better the config format, do a fetch from your organization or have
a look at the samples. Notice the use of the include
statement. Using this statement you can combine multiple config files together, making
it ideal for the management of complex rule sets and their versioning.
python -m limacharlie.SpotCheck --no-macos --no-linux --tags vip --file c:\\evil.exe
Used to perform Organization-wide checks for specific indicators of compromise. Available as a custom
API SpotCheck object or as a module from the command line. Supports many types of IoCs like file names,
directories, registry keys, file hashes and yara signatures.
For detailed usage: python -m limacharlie.SpotCheck --help
limacharlie search --help
Shortcut utility to perform IOC searches across all locally configured organizations.
limacharlie artifacts upload --help
Shortcut utility to upload Artifact Collection directly to
LimaCharlie with just the CLI (no Agent).
limacharlie artifacts get_original --help
Shortcut utility to download Artifact Collection in
LimaCharlie locally.
limacharlie replay --help
Shortcut utility to perform Replay jobs from the CLI.
limacharlie dr --help
Shortcut utility to manage Detection and Response rules over the CLI.
limacharlie events --help and limacharlie detections --help
Print out to STDOUT events or detections matching the parameter.
limacharlie sensors 'plat == windows'
Print out all basic sensor information for all sensors matching the selector.
limacharlie extension --help
Shortcut utility to perform actions pertaining Extensions using just the CLI.