WinRAR Archive .R00, .R01, .R05, .R15, .R20, .R25 Malicious Email Attachments

WinRAR Archive .R00, .R01, .R05, .R15, .R20, .R25 Malicious Email Attachments

Online users who have received unexpected email messages with attached files with names ending with ".r00", ".r01", ".r02", ".r03", ".r05", ".r10", ".r12", ".r15", ".r20", ".r25" and so on... are asked not to open them. This is because the fake email messages are being sent by cyber criminals and the attachments are WinRAR compressed archived files that contain malware, malicious programs or computer 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 Malicious WinRAR Archive .R00, .R01... Email Message

Subject: INVOICE NO 3
Date: Tue 15/08/2017 08:07
From: Sadiya Sayeed
Attachment: INVOICE NO 3.r20

Dear sir/madam,

Find and open attached document by double clicking it, because document is protected.

advice according invoice.

best regards


Sadia Saeed

Sales & Technical Manager

Mobile: +63 926 618 1579

+63 998 889 2257

Tel: +63 442 4295

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

Cyber criminals 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 ".RAR" file?

RAR is the native format of WinRAR archiver. Like other archives, RAR files are data containers, they store one or several files in the compressed form. The data-containers or split multi-volume RAR compressed files archive use file extensions or names ending with:

".r00",".r01", ".r02", ".r03", ,".r04", ".r05", ".r06", ".r07", ".r08", ".r09", ".r10", ".r11", ".r12", ".r13", ".r14", ".r15", ".r16", ".r17", ".r18", ".r19", ".r20", ".r21", ".r22", ".r23", ".r24", ".r25", ".r26", ". r27", ". 28", ". 29", ". 30" and so on.

After you have downloaded RAR file from the Internet, you need to unpack its contents in order to use it.

Check the comment section below for additional information, share what you know, or ask a question about this article by leaving a comment below. And, to quickly find answers to your questions, use our search Search engine.

Note: Some of the information in samples on this website may have been impersonated or spoofed.
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Comments, Questions, Answers, or Reviews

Comments (Total: 3)

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  • July 12, 2019 at 1:48 PM by an anonymous user from: Mesa, Arizona, United States

    I would suggest before opening any compressed file (.zip, .rar, etc), THAT YOU SCAN IT FOR VIRUSES, and if you are not expecting the email, or it comes from a complete stranger, DELETE without opening.

  • July 12, 2019 at 7:35 AM by info

    "Attachment: FedEx shipment Arrival Notification 12-07-2019 #AWB011040270.r00 (129 KB)

    Dear Valued Customer,

    Your parcel has arrived our trans loading/final delivery point, enclosed here with the final delivery schedule receipt for the destination country

    kindly print attached shipping document (s) for confirmation during delivery.

    Pieces : 1

    Weight : 0.45 KG

    Shipment reference : AWB: original invoice documents

    Description : document

    If you would like to find out about the many ways TNT helps you to track your shipment, or if you would like to know more about the services provided by TNT, simply connect to www.FedEx and select your location at any time."

    Received the fake email above with the malicious .r00 attachment.

  • November 22, 2017 at 9:39 PM by info

    Here is another scam:

    - - -

    "RE: Quotation

    Wed 22/11/2017 16:34

    From: Fred

    Attachment: Quotation.r12 (265 KB)

    I have tried reaching you but no response.

    This is my alternative email.

    Kindly check if the attached quotation is still valid?

    Your prompt reply is highly appreciated.

    Thanks in advance.


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WinRAR Archive .R00, .R01, .R05, .R15, .R20, .R25 Malicious Email Attachments