Top Malware Warning Signs Before Your Bank Locks Online Access

Australian banks do not usually lock online access without a reason. In most cases, their fraud systems have detected activity linked to malware, credential theft, or remote access software that scammers use to control a customer's computer.

Warning signs to watch for

• Unexpected pop-ups claiming your computer is infected or your bank account is compromised
• New remote access tools such as AnyDesk, TeamViewer, or Splashtop you did not install
• Browser extensions or login pages that look slightly different from normal
• Slower performance, new startup programs, or antivirus disabled without explanation
• Password reset emails or SMS codes you did not request
• Someone on the phone pressuring you to install software or share screen access

If several of these appear together, treat it as urgent. Disconnect from the internet, stop using online banking on that device, and use a different phone or computer to contact your bank through official channels.

Why banks restrict access

Banks are trying to stop fraudulent transfers while malware is still active. A device cleanup alone is often not enough for recovery — many institutions also ask for proof that the computer is safe before restoring full online access. In Adelaide, that is where an Internet Banking Security Certificate can help.

For a broader overview of how malware and scams lead to account restrictions, read our guide on bank account freezes caused by malware.