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A device to seek/mine for Cobalt Strike beacons and “cut back” their beacon configuration for later indexing. Hunts can each and every be expansive and web in depth using services and products like SecurityTrails, Shodan, or ZoomEye or a list of IP’s.

Getting began

  1. Prepare melting-cobalt
  2. Configure your tokens to begin out out the quest
  3. Mine Beacons to begin out out decreasing them
  4. Overview effects cat effects.json | jq

Prepare

Should haves: virtualenv, and python3.8+

  1. git clone https://github.com/splunk/melting-cobalt && cd melting-cobalt Clone downside and cd into the issue dir.
  2. pip prepare virtualenv && virtualenv -p python3 venv && supply venv/bin/turn on && pip prepare -r will have to haves.txt Create Virtualenv and prepare will have to haves.

Proceed to configuring for SecurityTrails, Shodan, or ZoomEye API key.

Configuration melting-cobalt.conf

Reproduction melting-cobalt.conf.instance to melting-cobalt.conf!

Be sure you set a token for one of the crucial necessary to be had suppliers. If you want to create one in your account observe [these](htt://want wiki web internet web page) directions.

Configuration instance:

scanning provider supplier (eg shodan, zoomeye, coverage trails) when searching for staff servers. shodan_token = TOKENHERE # shodan token for taking a look zoomeye_token = TOKENHERE # zoomeye token for taking a look securitytrails_token = TOKENHERE # coverage trails token for taking a look “>

[global]
output = effects.json
# retail outlets suits in JSON right kind proper right here

log_path = melting-cobalt.log
# Units the log_path for the logging record

log_level = INFO
# Units the log degree for the logging
# Conceivable values: INFO, ERROR, VERBOSE

nse_script = grab_beacon_config.nse
# trail to the nse script that rips down cobalt configs. That is specifically using https://github.com/whickey-r7/grab_beacon_config

searches = seek.yml
# incorporates the other searches to run on each and every web scanning provider supplier (eg shodan, zoomeye, coverage trails) when searching for staff servers.

shodan_token = TOKENHERE
# shodan token for taking a look

zoomeye_token = TOKENHERE
# zoomeye token for taking a look

securitytrails_token = TOKENHERE
# coverage trails token for taking a look

Seek The Web

To modify the default mining carried out everywhere other suppliers, customise seek.yml. The default melting-cobalt Seek Examples underneath.

Run:

python melting-cobalt.py

Seek IP tick list

populate ips.txt with imaginable Cobalt Strike C2 IPs a brand new line delimeted, instance:

Run:

python melting-cobalt.py -i ips.txt

If you want to have inspiration from hunters we extremely suggest:

Utilization

utilization: melting-cobalt.py [-h] [-c CONFIG] [-o OUTPUT] [-v] [-i INPUT]

scans for open cobalt strike staff servers and grabs their beacon configs and write this as a json log to be analyzed by the use of any analytic equipment
like splunk, elastic, and a number of others..

now not obligatory arguments:
-h, --help display this have the same opinion message and transfer out
-c CONFIG, --config CONFIG
config record trail
-o OUTPUT, --output OUTPUT
record to put in writing the entire manner right down to the effects, defaults to effects.json.log
-v, --version displays supply melting-cobalt edition
-i INPUT, --input INPUT
newline delimeted record of cobalt strike server ips to take hold of beacon configs from. instance ips.txt

Seek Examples

The next searches are equipped out of the sphere and extra is also added to seek.yml for added knowledge.

Shodan

To search out specific JARM signatures, out of the sphere we follow Cobalt Strike 4.x

'ssl.jarm:07d14d16d21d21d07c42d41d00041d24a458a375eef0c576d23a7bab9a9fb1'

Clear out by the use of HTTP headers and ports to reduce noisy effects

'ssl.jarm:07d14d16d21d21d07c42d41d00041d24a458a375eef0c576d23a7bab9a9fb1 port:"22, 80, 443, 444, 1234, 2000, 2222, 3000, 3780, 4000, 4443, 6379, 7443, 8443, 8080, 8081, 8082, 8087, 8088, 8099, 8089, 8090, 8181, 8888, 8889, 9443, 50050" HTTP/1.1 404 No longer Discovered Content material materials material-Duration: 0'

Group of workers server detected by the use of Shodan

'product:"cobalt strike staff server"'

word: will generate plenty of noisy effects, don’t in truth time table this until you wish to have to burn your license credit score rating.

Group of workers server certificates serial

'ssl.cert.serial:146473198'

SecurityTrails

To search out specific JARM signatures

'SELECT take care of, ports.port FROM ips WHERE jarm = "07d14d16d21d21d07c42d41d00041d24a458a375eef0c576d23a7bab9a9fb1"'

Clear out by the use of HTTP Headers and ports to reduce noisy nmap_results

'SELECT take care of, ports.port, isp.name_normalized, ports.port, take care of, asn.quantity, jarm, http.headers.uncooked FROM ips WHERE jarm = "07d14d16d21d21d07c42d41d00041d24a458a375eef0c576d23a7bab9a9fb1" OR jarm = "07d14d16d21d21d07c07d14d07d21d9b2f5869a6985368a9dec764186a9175" OR jarm = "2ad2ad16d2ad2ad22c42d42d00042d58c7162162b6a603d3d90a2b76865b53" AND http.headers.content_type = "textual content/simple" AND http.headers.uncooked = "content-length:0" AND ports.port IN (22, 80, 443, 444, 1234, 2000, 2222, 3000, 3780, 4000, 4443, 6379, 7443, 8443, 8080, 8081, 8082, 8087, 8088, 8099, 8089, 8090, 8181, 8888, 8889, 9443, 50050)'

Creator

Improve

Please use the GitHub factor tracker to position up insects or request alternatives.

In case you have questions or want improve, you’ll be able to:

Credit score rating & References

Inspiration got proper right here from a handful of blogs: A large number of that is very best imaginable on account of whiskey-7 shared with us grab_beacon_config.nse

TODO

  • upload zoomeye
  • Dedup effects ahead of nmap
  • upload checking the latest finish end result by the use of taking a look on the latest_updated box

License

Copyright 2020 Splunk Inc.

Authorized underneath the Apache License, Type 2.0 (the “License”); you will not use this record with the exception of in compliance with the License. Chances are you’ll download a duplicate of the License at

http://www.apache.org/licenses/LICENSE-2.0

Until required by the use of appropriate law or agreed to in writing, tool allocated underneath the License is allocated on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, each and every explicit or implied. See the License for the suitable language governing permissions and boundaries underneath the License.




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