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Necrobrowser is browser instrumentation for necromantic session control.
Motto
“Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you.” ― Friedrich Nietzsche
About
NecroBrowser is a microservice that exposes a RESTful API allowing you to specify which target portal to instrument via a dockerized Chrome headless instance.
The target portal is instrumented hijacking an existing authenticated session. The idea is to feed NecroBrowser with sessions harvested during phishing campaigns (see Muraena) to quickly perform actions on the victim behalf.
Post-phishing automation is an often underestimated activity that helps:
- performing actions after successful session harvesting on campaigns with hundreds/thousands targets
- backdooring accounts with new keys or credentials
- performing automated password resets
- extruding information
- impersonating users to further exploit trust relationships
Each authenticated session is instrumented in a Docker container and can be kept alive to be reused after an initial set of automated tasks completed.
Since NecroBrowser is just a browser instrumentation tool, you can also write automation for other phishing phases, for example initial Reconnaisance and OSINT. Ideas are plenty, for instance:
- keep N fake personas on LinkedIn/Twitter/YourSocialNetwork active on Chrome to monitor/scrape info from your targets
- automatically build Social Network connections
- automate interaction with target contact forms/chats to get target info
Requirements
- Docker (base image registry.hub.docker.com/zenika/alpine-chrome:latest)
Notes
NecroBrowser is still experimental.
Make sure you run NecroBrowser on a machine with enough RAM if you have tens of sessions to instrument in parallel. The cap is just how many docker containers you can spawn.
If you are brave enough to try NecroBrowser in production, remember that if you run NecroBrowser on a different IP than the one where you perform the phishing phase, you need to SOCKS/IPSEC/VPN your way back to the phishing IP. This is actually advised, unless you have a big enough machine where you run both your phishing tool (see Muraena) and NecroBrowser.
API Calls
POST /instrument/<TOKEN>| Instrument a zombiePOST /instrumentKnown/<TOKEN>| Instrument an existing zombiePOST /status/<TOKEN>| Check NecroBrowser status
Zombies Examples
Github
Request (keywords is ignored for this profile):
{
"provider": "github",
"keywords": ["supercazzola"],
"debugPort": 9223,
"sessionCookies": [
{"name": "has_recent_activity", "value":"1", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "has_logged_in", "value":"yes", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "dotcom_user", "value":"[...]", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "_octo", "value":"[...]", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "tz", "value":"1", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "_gat", "value":"1", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "user_session", "value":"[...]", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "__Host-user_session_same_site", "value":"[...]", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "_gh_sess", "value":"[...]", "domain":"github.com","expires":"Session","path":"/","httpOnly":true,"secure":true}
]
}Vultr
Request:
{
"provider": "vultr",
"keywords": ["supercazzola"],
"debugPort": 9226,
"sessionCookies": [
{"name": "PHPSESSID", "value":"[...]", "domain":".my.vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "PHPSESSID_login_expire", "value":"[...]", "domain":".vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "__cfduid", "value":"[...]", "domain":".vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "auth_browser", "value":"[...]", "domain":".my.vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "cookieconsent_status", "value":"[...]", "domain":".vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "discuss_token", "value":"h%[...]%2A", "domain":".vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "last_login_username", "value":"[...]", "domain":"my.vultr.com","expires":"Session","path":"/","httpOnly":true,"secure":true}
]
}Slack
Request:
{
"provider": "slack",
"keywords": ["supercazzola"],
"debugPort": 9226,
"sessionCookies": [
{"name": "b", "value":"[...]", "domain":".slack.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "d", "value":"[...]", "domain":".slack.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "d-s", "value":"[...]", "domain":".slack.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "lc", "value":"[...]", "domain":".slack.com","expires":"Session","path":"/","httpOnly":true,"secure":true},
{"name": "x", "value":"[...]", "domain":".slack.com","expires":"Session","path":"/","httpOnly":true,"secure":true}
]
}Existing Zombie
{
"jobId": "d2c7dec6-1d88-4184-a491-c90d5493b7ea",
"url": "https://google.com"
}Status
Example response with one browser runnning:
{
"jobs": [
{
"id": "d2c7dec6-1d88-4184-a491-c90d5493b7ea",
"provider": "slack",
"Context": {
"Context": 0
},
"ChromeDP": {}
}
]
}License
necrobrowser is made with
React
Typescript
Django
Laravel
Facebook
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