Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

Combofix possibly infected


  • Please log in to reply
9 replies to this topic

#1 hongkongguy

hongkongguy

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Local time:06:07 AM

Posted 15 October 2008 - 12:38 AM

It is suspected that the Combofix.exe program has been infected. Because the TrendMicro anti-virus software on my PC complained that the software is suspected to be infected by PAK_Generic.001. Please kindly check if this is really the case. If it is, please fix the program immediately or more people would have trusted that the program could kill virus/spyware but in fact they are using an infected program.

BC AdBot (Login to Remove)

 


#2 Budapest

Budapest

    Bleepin' Cynic


  • Moderator
  • 23,579 posts
  • OFFLINE
  •  
  • Gender:Male
  • Local time:08:07 AM

Posted 15 October 2008 - 01:07 AM

Given the way ComboFix works, it's not surprising that anti-virus software flags it up.

ComboFix is a tool that should only be run under the supervision of someone who has been trained in its use. Using it on your own can cause problems with your computer.


The power of accurate observation is commonly called cynicism by those who haven't got it.

—George Bernard Shaw

#3 hongkongguy

hongkongguy
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Local time:06:07 AM

Posted 15 October 2008 - 01:15 AM

Well, as a matter of fact, I did not run Combofix.exe yet, TrendMicro complained right after I have downloaded the software !

#4 garmanma

garmanma

    Computer Masochist


  • Members
  • 27,809 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Cleveland, Ohio
  • Local time:06:07 PM

Posted 15 October 2008 - 03:43 PM

Combofix should only be used when instructed to do so by someone who has been properly trained. ComboFix is intended by its creator to be "used under the guidance and supervision of an expert", NOT for private use. Please read Combofix's Disclaimer. Using this tool incorrectly could lead to disastrous problems with your operating system such as preventing it from ever starting again.
Mark
Posted Image
why won't my laptop work?

Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around
Do not send me PMs with problems that should be posted in the forums. Keep it in the forums, so everyone benefits
Become a BleepingComputer fan: Facebook and Twitter

#5 hongkongguy

hongkongguy
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Local time:06:07 AM

Posted 15 October 2008 - 08:39 PM

If the Malware was deliberately included in the software, maybe I was too dump to understand the design of Combofix which itself contains Malware while it is supposed to clean up Malware. If that is realy the case, should the guideline be modified to remind downloaders that the warning is normal? Please allow me to re-iterate myself that I did not actually install/run the software at all, the warning message of Malware found appeared immediately after I have downloaded the software. Understand that using Combofix is at our own risks, but somehow we might have to be assured that what we are downloading does not contain or by design containing Malware. Otherwise users are not sure if they ware downloading infected software. I think trust is the main keyword in this context.

#6 garmanma

garmanma

    Computer Masochist


  • Members
  • 27,809 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:Cleveland, Ohio
  • Local time:06:07 PM

Posted 15 October 2008 - 08:44 PM

When you download and run Combofix, you will be told by a HJT team member to turn off your anti-virus software because it will probably be flagged as malware, due to the fact of the way it works

Edited by garmanma, 15 October 2008 - 08:45 PM.

Mark
Posted Image
why won't my laptop work?

Having grandkids is God's way of giving you a 2nd chance because you were too busy working your butt off the 1st time around
Do not send me PMs with problems that should be posted in the forums. Keep it in the forums, so everyone benefits
Become a BleepingComputer fan: Facebook and Twitter

#7 hongkongguy

hongkongguy
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Local time:06:07 AM

Posted 15 October 2008 - 08:59 PM

Normally the advised sequence is :
1) download Combofix
2) turn off anti-virus sofware
3) run Combofix

Mine is :
1) download Combofix
2) being warned that Combofix contais Malware

I DID NOT RUN THE SOFTWARE AT ALL !!

As I said, if the software is known containing Malware (maybe it is needed this way), please say so. Then downloaders can judge themself whether they should continue to download.

#8 duffyy

duffyy

  • Members
  • 2 posts
  • OFFLINE
  •  
  • Local time:12:07 AM

Posted 16 October 2008 - 12:40 AM

What the folk are saying is that "Combofix" is not infected in any way.

The process that "Combofix" follows, and the coding of the program, appears to antivirus software to be a virus or malware, therefore you will receive a warning from your antivirus softare.

Before you download Combofix, switch off you antivirus software, then download the software.

As mentioned above, be aware that you can cause damage to your system by using Combofix if you do not understand the workings of Combofix. Rather use it under the supervision of one of the folk here

#9 Galadriel

Galadriel

    Bleepin Elf


  • Malware Response Team
  • 2,753 posts
  • OFFLINE
  •  
  • Gender:Female
  • Location:Missouri, USA
  • Local time:04:07 PM

Posted 16 October 2008 - 12:59 AM

It is suspected that the Combofix.exe program has been infected. Because the TrendMicro anti-virus software on my PC complained that the software is suspected to be infected by PAK_Generic.001. Please kindly check if this is really the case. If it is, please fix the program immediately or more people would have trusted that the program could kill virus/spyware but in fact they are using an infected program.


To explain the detection of combofix further... I've bolded the relevant part of your post.

If you break it down, in parts, you get the following:

PAK - This part means the detection is based on whether the file was packed with a file packer. File packers are often used to make the file smaller in size, and sometimes to encrypt the contents. Packers themselves are not infections, but as a lot of malware use packers, some AVs tend to flag any packed file.

Generic - Here's the good part. What does the word mean? It means general, unspecific. In other words, it's a vague detection. Usually heuristics based. Those are always meant to be inspected further, because they are not 100% certain, in fact, they are the cause for most false positives. You should always be careful when this type of detection comes up and research it further before taking a decision about the files.

The number is just a variation of the above. So in short, what everyone has been saying is correct, but the detection actually speaks for itself. The program is not infected. You can be sure of that.
I cemna prestar aen. Han mathon ne nen. Han mathon ne chae. A han noston ne 'wilith. - Galadriel
'The avatar is changed; I can feel it in the water, I can feel it in the earth, I can smell it in the air.'

Phear teh ceiling cat, for he is roofkittehd! - Basement Cat

I'm a Bleeping Folder, are you? - Join BC in the fight against diseases - Click here
Become a BleepingComputer fan: Facebook

#10 hongkongguy

hongkongguy
  • Topic Starter

  • Members
  • 5 posts
  • OFFLINE
  •  
  • Local time:06:07 AM

Posted 16 October 2008 - 01:11 AM

Thank you. If that is the case, would the guideline be revised such that other downloaders would be aware of this possibility? Or should there be a remarks or whatever to remind the downloaders? Otherwise they might have the same doubt as I did.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users