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Beware of .GZ Malicious Email Attachments

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Beware of .GZ Malicious Email Attachments

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Online users who have received unexpected email messages with attached files with names ending with ".gz" are asked not to open them. This is because the attachments are compressed files that may contain malware, malicious programs or viruses. And, any attempt to open the malicious attachments will result in the recipients getting their computers infected with a virus, Trojan horse, spyware, ransomware or other malware.

A Sample of a Malicious ".GZ" Email Message

Attachment: BANK DETAILS_PDF.gz 372 KB

Subject: Re-Confirm The Attached Bank Details

Date: Mon 1/7/2019 4:52 AM

From: Razor Pajero

To: ben.chong@tehknet.com.my

Dear Sir,

I am writing you from a different email because we received an email from one of your

colleague today stating that a change of BANK ACCOUNT for remittance of our subsequent invoice

payments. Please kindly re-confirm the attached bank details for clarity, so that we can update our

account department accordingly.

Kindly check & confirm immediately in a return mail.

BEST REGARDS

Razor Pajero

YII HKNET INTERNATIONAL CO., LTD TAIWAN

Email ben.chong@tehknet.com.my

Please feel free to write back Email or call us directly on our Mobile Number for any information or query. We look forward to your positive response.

****************** Disclaimer *************

This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Bharat Fritz Werner Limited has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment.

************* End of Disclaimer *************

PLEASE CONFIRM CHANGE OF BANK ACCOUNT

The .GZ compression is similar to ZIP which is the most popular file compression or archive formats.

Cybercriminals usually store their malware in compressed files to help prevent antivirus software from detecting them. In other words, they do it because the compressed malicious email attachments may bypass the recipients' antivirus software.

What is a .GZ file?

GZ files are compressed files created using the gzip compression utility, which was initially created by two software developers to replace and improve on Compress in UNIX. This utility is most commonly used on UNIX and Linux systems.

Note: Some of the names, addresses, email addresses, telephone numbers or other information in samples on this website may have been impersonated or spoofed.

Please share what you know or ask a question about this article by leaving a comment below. Also, check the comment section below for additional information, if there is any.

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Beware of .GZ Malicious Email Attachments