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Complaint Letter Virus


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14 minutes ago, rscrouse said:

Does MalwareBytes detect and quarantine the Complaint Letter Virus on Windows and MAC?

Since this is probably a doc file attachment, it would be detected by the exploit detection of the paid version of Malwarebytes. It would not be detected by a scan.

Malwarebytes does not target script files during a scan.. That means MB will not target; JS, HTML, VBS, .CLASS, SWF, BAT, CMD, PDF, PHP, etc.

It also does not target documents such as; PDF, DOC, DOCx, XLS, XLSx, PPT, PPS, ODF, etc.

It also does not target media files;  MP3, WMV, JPG, GIF, etc.

 

Malwarebytes will detect files like these on execution only with the anti-exploit module of the paid program.

https://www.pcrisk.com/removal-guides/13377-company-complaint-email-virus

Quote

How to avoid installation of malware?

Have a reputable anti-virus/anti-spyware suite installed and running. Carefully study all emails received and attachments - files that seem irrelevant or have been received from dubious websites should never be opened. We strongly recommend that you download your programs from official sources only and keep installed applications up-to-date. The main reasons for computer infections are poor knowledge and careless behavior - the key to safety is caution. If you have already opened the "Company Complaint Email Virus" attachment, we recommend running a scan with Malwarebytes for Windows to automatically eliminate infiltrated malware.

 

Edited by Porthos
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Just now, rscrouse said:

To be clear, are you saying that the paid version of MB does, in fact, detect the Complaint Letter virus?

It wont hit on the actual doc file but if someone carelessly opens it and lets the macros run, the exploit protection should block the actual install of the payload.

But best practice is not to fall for these scam emails in the first place. Do not open any attachment you are not expecting.

 

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What is a "Complaint Letter Virus" ?

Viruses are a distinct type of malware that are able to Self Replicate.  That is they are able to autonomously spread on their own.  From file to file.  File to computer or computer to file or from computer to computer.

Viruses are now a very, very, small component of the malware arena.  When it comes to malicious software the terminology "virus" is widely abused and misused.

The terminology "Complaint Letter Virus" sounds more like a colloquial term than a real computer virus name like;  Jerusalem, Form, Nimda, PariteWannaCry and Virut

As @Porthos has noted, MBAM does not target Documents 1as a letter would be.  MBAM would block the malicious actions rendering a document may cause by the MBAM anti exploitation module.  Computer Documents would not be viruses themselves.  Malicious documents are mainly classed as Trojans as the propensity Today are documents that drop malware or download malware and do not autonomously spread.  There were malicious documents in the past that did have this ability.  That is the VB Macro language was used to create a Macro Virus that would infect MS Office and would subsequently infect any clean documents that were opened.  These documents were then able to spread the Macro Virus to other systems.  Today's documents do not contain Macro Viruses.  Instead, the VB Macro Language is used to download and or drop malware and the vast majority of the payload malware are Trojans and not viruses.


1.  Assuming a computer letter.  One could have a US Postal "Complaint Letter" that contains something like Anthrax spores and thus could be a "Complaint Letter Virus".

Edited by David H. Lipman
Edited for content, clarity, spelling and grammar
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Posted (edited)

Hi David. I'm referring to the virus/malware that the page at this link describes

https://www.pcrisk.com/removal-guides/13400-complaint-email-virus

This page describes a "Complaint Email Virus" and offers links to buy MB for protection. I have been told the the "Complaint Letter Virus" is similar (I believe it is in the "kitty" virus family), but infects your computer by sending an email from an infected computer to another email address also in the infected computer but adds a zip file attachment with file name "complaint-letter-<string of digits>." Infection occurs if you unzip and then open the document. A person I know had the virus and worked with a "antivirus expert." He removed the virus, he says, using MalwareBytes. We have a situation where a number of computers in an office have been exposed to possibly getting this virus. I'm trying to find out if MB actually does detect this virus is present on a PC and MAC when you do a full scan. Do you know if it does? Thank you.

Edited by AdvancedSetup
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PCRisk is giving very poor quality information and its not new.  It is so generic and vanilla.  Its made to capture the eye of someone who just doesn't know much about malware.


The site is all about supplying insufficient information such that you choose Image.jpg.561ea79a184d145c27c49dc47e9c1254.jpg I see other "guides" as well also indicate  Image.jpg.561ea79a184d145c27c49dc47e9c1254.jpg  Maybe for affiliate revenue of some kind. 

Malwarebytes software is best downloaded directly from Malwarebytes itself and not from PCRisk.

In any case Malwarebytes will handle any form of malware that topic covers.

 

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3 hours ago, David H. Lipman said:

Maybe for affiliate revenue of some kind. 

Yes David they are an affiliate. their link gives them credit for the sale if purchased. VT for download.

But David is correct, ALL software should be downloaded from the official websites to prevent scams.

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