Question 1

What is TCLBANKER and how does it spread?

Accepted Answer

TCLBANKER is a Brazilian banking trojan delivered through a trojanized Logitech installer. It hijacks victims' WhatsApp Web sessions and Outlook email accounts to send phishing messages to their contacts, according to Elastic Security Labs.

Question 2

Which crypto platforms does TCLBANKER target?

Accepted Answer

The trojan monitors an encrypted list of 59 Brazilian banking, fintech, and cryptocurrency domains. It activates a remote-control session when a victim visits any of those sites in their browser.

Question 3

How does TCLBANKER avoid detection by security researchers?

Accepted Answer

The malware generates an environment fingerprint from anti-debugging checks, system hardware, and language settings, then uses that fingerprint to decrypt its payload. If any check fails (sandbox detected, debugger attached, non-Brazilian locale), the payload never decrypts and execution stops silently.

Logitech

Brazilian trojan hijacks WhatsApp to spread crypto phishing

One sharp brief.
Every day.

Logitech

Brazilian trojan hijacks WhatsApp to spread crypto phishing

One sharp brief.Every day.

One sharp brief.
Every day.