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Home   »   Malware   »   Bogus “Balance Checker” Tool Carries Malware

Bogus “Balance Checker” Tool Carries Malware

  • Posted on:November 14, 2009 at 12:30 am
  • Posted in:Malware, Spam
  • Author:
    Nino Penoliar (Anti-spam Research Engineer)
3

Trend Micro threat analysts received samples of spammed messages purporting to have come from mobile phone companies, Vodafone and Verizon Wireless. The email messages carry the subject, “Your credit balance is over its limits” and inform users that their credit balance is due. To be able to review the payments, users should employ the balance checker tool attached to the email.

Click Click

When users open the attached .ZIP file, they will not find a balance checker tool but will instead get a malicious file (balancechecker.exe) detected by Trend Micro as TROJ_ZBOT.MYS. TROJ_ZBOT.MYS steals online banking credentials such as usernames and passwords. This stolen information may be used by cybercriminals for other fraudulent activities. It also disables the Windows Firewall and has rootkit capabilities that make detection and removal difficult.

Users are strongly advised not to open any suspicious-looking email even it comes from a known source. It is also good to verify any email coming from your mobile service provider just to be sure if it is legitimate or not. Trend Micro protects users from this attack via the Trend Micro Smart Protection Network™ that detects and blocks spammed emails and malicious files.

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