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RedLungfish: an organised phishing group targeting fintech customers

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Bradley Kemp on

The Phish Report threats team have identified an organised threat actor (codenamed RedLungfish) who are targeting fintech customers with realtime phishing kits.

First observed in March 2023, RedLungfish have deployed phishing sites targeting a wide range of fintech customers from the point-of-sale solution Clover to the trading platform E-Trade:

Salesforce PayJunction Clover
Barclaycard Wise ConvergePay
Screenshots via urlscan.io

Every phishing site deployed, no matter the brand, connects back to the same admin panel (at the time of writing, hosted on hunting-panel[.]cc). However, unlike Phishing as a Service kits, there are no license keys to identify individual sites, leading us to believe that these sites are all being operated by the same actors.

Structure of a RedLungfish phishing kit

All RedLungfish phishing kits follow the same pattern:

  • They are cloned from the legitimate login page using Save Page WE, resulting in a single HTML file which embeds all necessary CSS for the page to display
  • Additional forms are added to ask for additional information e.g. the victims card PIN, or an SMS 2FA code. These forms are selectively displayed and hidden according to the stage the victim has reached.
  • A script rl-script.js is inserted which communicates with the admin panel via websockets and controls the journey of the victim through the different screens

The rl prefix is used throughout the kit from filenames to CSS classes (leading to our codename "RedLungfish").

The code in rl-script.js loads a config file which controls where collected credentials are sent to as well as where victims are redirected after the phish is complete (or if they're "banned" manually or via an IP reputation check):

/* /rl-script/config.js */
export const backUrl = "https://api.hunting-panel.cc";
export const apiKey =
    "<redacted>";
export const apiUrl = `https://api.ipdata.co?api-key=${apiKey}`;
export const project = `barclaycard`;
export const banLink = `https://identify1.business.barclaycard/login#gcpidvlogon`;

RedLungfish admin panel

All RedLungfish phishing kits communicate with a single admin panel where the operators can see the credentials that victims have entered and send them to the next stage of the phishing flow.

The admin panel is password protected with a username and password which we've been unable to bypass.

The login page of RedLungfish's centralised admin panel
The login page of RedLungfish's centralised admin panel

However, because the admin panel is built with React as a single page application, we are able to see all the capabilities present in the source code. And, by intercepting requests to the server and returning our own mock data, we can see what the admin panel would look like in real use.

./hunting-panel/services
├── auth
│   ├── ifValidJwtFunc.js
│   ├── loginService.js
│   ├── logout.js
│   └── transformUserData.js
├── news
│   ├── deleteNews.js
│   ├── getAllNews.js
│   └── postNewNews.js
├── projects
│   ├── allowToProjectBtns.js
│   ├── createNewProject.js
│   ├── deleteProject.js
│   ├── getProjPossBtns.js
│   └── getProjects.js
├── sessions
│   ├── deleteSession.js
│   ├── getAllSessions.js
│   ├── getOpenedSession.js
│   ├── sendUserTakeLog.js
│   └── sendUserThrowLog.js
├── socket
│   └── socketIoService.js
└── users
    ├── allowUserProjects.js
    ├── changeUserActive.js
    ├── changeUserRole.js
    ├── createUser.js
    ├── deleteUser.js
    └── getUsers.js

Users

The RedLungfish admin panel support multiple users with varying permission levels. At creation time, each user is given one of the following roles:

  • Admin - ability to create new users, projects, and assign users to projects
  • Worker - ability to interact with phishing victims
The admin interface for managing users and assigning them to projects
The admin interface for managing users and assigning them to projects

Projects

The RedLungfish admin panel supports many simultaneous "projects" corresponding to the different brand being phished. The project ID is specified by the project value in the phishing kit's /rl-script/config.js file.

Admins are able to see which workers are currently logged in and active and move them between working on different projcts.

The admin interface for managing brands and configuring the steps in the phishing flow
The admin interface for managing brands and configuring the steps in the phishing flow

News

The admin panel also has a basic "news" feature where admins can write messages which are displayed on the homepage to all workers.

The admin interface for sending news updates to workers
The admin interface for sending news updates to workers

IOCs

Admin panel domains

  • hunting-panel[.]cc (currently active)
  • hunting-panel[.]click

Phishing site domains

  • fidelity-payment[.]com
  • transax-login[.]lol
  • robinhood-payment[.]com
  • etrade-login[.]com
  • robinhod-login[.]com
  • accessmylq-logins[.]com
  • goemerhcant[.]com
  • accessmylq-online[.]com
  • plastiq-payment[.]com
  • saqepayments[.]com
  • accessmyiq-login[.]com
  • salesforce-payment[.]com
  • covnergaspay[.]com
  • claerents-payment[.]com
  • plastiq-login[.]com
  • airtm-app[.]com
  • paiytrace[.]com
  • ecommpay-login[.]com
  • sages-payment[.]com
  • payytrace-online[.]com
  • sagepayments-net[.]com
  • online-valorqaytech[.]info
  • payitrace-login[.]com
  • pay-trace[.]com
  • payjianction-login[.]com
  • paytrace-loglns[.]com
  • clearents-login[.]com
  • paytrace-login[.]com
  • payjunction-login[.]com
  • bluesnap-login[.]com
  • paystand-login[.]com
  • sumup-online[.]com
  • worldnet-payment[.]com
  • payroc-login[.]com
  • cps-compasspaymentservices[.]com
  • payya[.]us
  • accessmyiq[.]bio
  • clover[.]pm

Indicator of Kit rules

Detection rule for phishing sites operated by RedLungfish:

title: redlungfish-kit
description: |
  This site loads config files and assets used by the
  RedLungfish threat actor
references:
  - https://phish.report/blog/red-lungfish-hunting-panel

detection:
  config:
    requests|endswith: "/rl-script/config.js"
  js:
    requests|endswith: "/rl-script/rl-script.js"
  css:
    requests|endswith: "/rl-style/rl-style.css"

  condition: 1 of them

Detection rule for the current version of the RedLungfish admin panel (version 1.13):

title: redlungfish-hunting-panel
description: RedLungfish admin panel
references:
  - https://phish.report/blog/red-lungfish-hunting-panel

detection:
  version1_13:
    title: "Hunting panel"
    requests|endswith|all:
      - main.eff5ae4f.js
      - main.6061ba32.css

  condition: 1 of them

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