MrTonyScam: Python-based Stealers Deployed via Facebook Messenger

A new phishing attack has recently been witnessed in Facebook Messenger where messages are being transferred with malwares attached to them, hailing from a “swarm of fake and hijacked personal accounts” and their aim is accessing targets’ business accounts. 

The attack, referred to as ‘MrTonyScam,’ executes its attacks by sending messages to their targets compelling them to click on their RAR and ZIP archive attachments, and launching a dropper that downloads the subsequent stage from a GitHub or GitLab repository.

Oleg Zaytsev, Guardio Labs researcher states in an analysis published over the weekend, “Originating yet again from a Vietnamese-based group, this campaign uses a tiny compressed file attachment that packs a powerful Python-based stealer dropped in a multi-stage process full of simple yet effective obfuscation methods.”

This payload is another archive file with a CMD file inside of it. The CMD file then contains an obfuscated Python-based stealer that exfiltrates all cookies and login information from various web browsers to a Telegram or Discord API endpoint that is under the control of an actor.

A significantly interesting tactic used by the threat actors is how they delete all cookies once they have stolen them in order to block their victims from their own accounts. They further hack the victim’s session with the help of the stolen cookies, changing passwords and thus acquiring complete control. 

Also, there have been sp

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