diff --git a/North Koreans APT/Velvet Chollima/README.md b/North Koreans APT/Velvet Chollima/README.md index 5cc9ac8..f90e73d 100644 --- a/North Koreans APT/Velvet Chollima/README.md +++ b/North Koreans APT/Velvet Chollima/README.md @@ -31,3 +31,31 @@ https://www.bleepingcomputer.com/news/security/fake-google-meet-conference-error First the attackers created PDF file includes a Hyperlink that leads to a (Fake-Captcha) page, The advantage of the hyperlink is that it does not appear in texts, and this is exactly what the attackers wanted to exploit. ![Screenshot From 2025-02-14 17-40-19](https://github.com/user-attachments/assets/ffcebb81-af32-4700-83ed-1a916b6db8a5) + +## The second stage (Fake-Captcha) + +This file is a fake CAPTCHA verification page, designed as part of a phishing attack or malicious script execution. + +![Screenshot From 2025-02-14 17-52-49](https://github.com/user-attachments/assets/3758dfcb-6725-4154-8466-03970b492afd) + +If you need know more about fake CAPTCHA: https://www.bleepingcomputer.com/news/security/malicious-ads-push-lumma-infostealer-via-fake-captcha-pages/ + +Here’s what it does: + +1. Fake Verification Interface + +The page displays a message prompting the user to verify that they are not a robot. +The design mimics a legitimate CAPTCHA verification page but is actually completely fake. + +2. Social Engineering Trick + +When the user clicks the checkbox ("I'm not a robot"), the verify() function in JavaScript is triggered. +This function displays a popup instructing the user to execute specific commands in PowerShell. + +3. Execution of Malicious PowerShell Code + +The script automatically copies a PowerShell command to the clipboard. +If the user follows the instructions and executes the code, it: +Establishes a reverse shell connection to IP:PORT. +Allows the attacker to remotely execute commands on the victim’s machine. +Persists by adding itself to the Windows registry (Run Key), ensuring execution every time the system starts.