These files are usually the final step before the malware "exfiltrates" (uploads) your login data to a Command and Control (C2) server or a Telegram bot controlled by the attacker. Immediate Recommendations If you have found this file on your device:
Log into your critical accounts (Email, Banking, Social Media) from a different, clean device and select "Log out of all other sessions." AllValideSession.txt
The existence of "Valid Sessions" in a text file means an attacker has likely bypassed Multi-Factor Authentication (MFA) by stealing the active session cookies directly from your browser. These files are usually the final step before