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ClamXav finding trojans; what do I do with them?

I've read many of the threads on here about anti-virus programs for Macs; most people seem to think they are not necessary & can cause problems, so I concluded it was better to get rid of the 'Norton' that came with the Mac, & in the end I downloaded 'ClamXav'. But it keeps finding trojans & 'heuretics phsishing mail' (? what is that?). Found 7 so far today. This is making me really nervous; does it not indicate that in fact I DO need a good anti-virus program? I find it hard to believe that Macs are completely immune to viruses.


I also don't know what to do with these trojans etc that keep being found; I thought that ClamXav will delete them, but it's showing this message: 'One or more infected files were found, but were left where they are. You can either deal with them yourself, or scan again with the preferences set to move them into a different folder.'. Can someone please tell me how to 'deal with them', & how to change the preferences so that ClamXav will delete them in future? (I cannot see anything in the preferences...). Thanks

iMac, Mac OS X (10.7)

Posted on Mar 17, 2013 4:25 AM

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11 replies

Mar 17, 2013 4:57 AM in response to Alberto Ravasio

Oh dear - I've now manually deleted them & emptied the trash, as I was nervous of them sitting there... Are any of the Console logs any help? I've tried to look, but it just shows a long list of every file that was scanned, then says '7 infected files' found, but doesn't say where they were. It also says 'I will delete infected files', but it did not delete them. I seem to remember that the trojans were something to do with Adobe..? (But I have a lot of Adobe products; PDF reader; Photoshop; Flash, etc...)

Mar 17, 2013 5:10 AM in response to AliWonder

first of all allow my to help informationally


http://www.reedcorner.net/mmg/


http://www.clamxav.com/BB/viewforum.php?f=1&sid=f451f391441f09e60c92a1338c79bdbf


https://discussions.apple.com/thread/4843307?answerId=21364871022#21364871022


the first link is to a "security awareness site for macs" the second is to "clamxav support form" and the third is a link to a similar infection on the mac side from the mac forum.


As for clamxav most of the time i have manually deleted issues discovered after finding out what they truly were.

Mar 17, 2013 8:03 AM in response to AliWonder

First, for faster, more efficient answers to questions about ClamXav I encourage you to visit the ClamXav Forum.


If you are finding these "Trojans" using the ClamXav application in a manual scan, there is no preference to delete the files. That is only used with the Sentry feature.


It is important to note know exactly where these infected files are located, as certain files don't like to be moved or deleted manually as they may correupt an index file. That includes most all e-mail along with iPhoto, iTunes and backup files. Such files need to be deleted from within the appropriate application, not the A-V program or the Finder.


There are a couple of ways to figure out which files were found:


- In ClamXav open the Scan Log by clicking the icon on the tool bar

- When the "clamXav-scan.log" window opens, you will only be looking at the only the most recent results

- Select Find->Find from the Edit menu or type Command-F

- Type "FOUND" in all caps and without the quotes in the Find: box

- Uncheck the "Ignore Case" box

- Click the "Next" button or type Command-G until you find what you are looking for

- If it doesn't show up in the most recent results, use the "▲ Earlier|" button in the lower right corner of the window to move back through the log.


or


Open the Terminal app (found in /Applications/Utilities/), then copy and paste the following after the "$ " prompt:

grep 'FOUND' ~/Library/Logs/clamXav-scan.log

and hit return.

Mar 17, 2013 8:31 AM in response to MadMacs0

Thanks both (sorry have not got a lot of time today to deal with this; I wasn't ignoring michaelsip4's reply). Re. reply above from MadMac; you mean I look for all the files that have 'FOUND' next to them? See below. (Some are showing as in the trash I think because I trashed them?). First 3 I can't identify, apart from one that looks like a file related to Firefox..? Ok - the other files which include this - amghardanna@yahoo.com@imap.mail.yahoo.com/ - are totally weird. This is my late boyfriend's email address. He used to use my computer, and for some reason that 'Mail' thing brings up all of his e-mails, including huge amounts of spam that comes via his Facebook page. I don't know how to stop it doing this. My boyfriend died last October so I cannot ask him to change his Facebook settings. I never even set up that 'Mail' program & don't use it myself; it just pops up from time to time, with a mixture of both mine and his e-mails in.


/Users/alicemutasa/.Trash/EPTBL.dll: Win.Trojan.Ramnit-499 FOUND

/Users/alicemutasa/.Trash/firefox.exe: Win.Trojan.Swrort-3602 FOUND

/Users/alicemutasa/.Trash/sqlite.dll: Win.Trojan.Zbot-10635 FOUND

amghardanna@yahoo.com@imap.mail.yahoo.com/INBOX.mbox/14F0B04F-CCD3-4038-B0D2-B6809A01D78C/Data/0/1/Me ssages/10513.emlx: Heuristics.Phishing.Email.SSL-Spoof FOUND

/Users/alicemutasa/Library/Mail/V2/IMAP-amghardanna@yahoo.com@imap.mail.yahoo.com/INBOX.mbox/14F0B04F-CCD3-4038-B0D2-B6809A01D78C/Data/0/1/Me ssages/10551.emlx: Heuristics.Phishing.Email.SSL-Spoof FOUND

/Users/alicemutasa/Library/Mail/V2/IMAP-amghardanna@yahoo.com@imap.mail.yahoo.com/INBOX.mbox/14F0B04F-CCD3-4038-B0D2-B6809A01D78C/Data/0/1/Me ssages/10552.emlx: Heuristics.Phishing.Email.SSL-Spoof FOUND

/Users/alicemutasa/Library/Mail/V2/IMAP-amghardanna@yahoo.com@imap.mail.yahoo.com/INBOX.mbox/14F0B04F-CCD3-4038-B0D2-B6809A01D78C/Data/1/1/Me ssages/11923.emlx: Heuristics.Phishing.Email.SpoofedDomain FOUND

Mar 17, 2013 8:44 AM in response to AliWonder

while you are waiting for madmacs response (have indirectly worked with the person before) allow me to make you aware of the email aspects.....first of all see the "apple discussion link" in the earlier post. on some of the heuristics.phising.email alerts....they are legitamite emails from reliable sources however due to formatting/structure they come up as a alert.... then again they could be bad as well.... just wanted to make you aware

Mar 17, 2013 11:18 AM in response to Alberto Ravasio

staying on the emal vein from the earlier discussion post


The word Heuristics means that it wasn't positively identified as a phishing message, just that something about the say it was formatted looked suspicious.


These should always be read first to make certain they aren't something important.


Secondly moving it will corrupt the mailbox index.


Here's my standard guidance on handling such things: Never use ClamXav (or any other A-V software) to move (quarantine) or delete e-mail. It will corrupt the mailbox index which could cause loss of other e-mail and other issues with functions such as searching. It may also leave the original e-mail on your ISP's e-mail server and will be re-downloaded to your hard drive the next time you check for new mail. So, if you choose to "Scan e-mail content for malware and phishing" in the General Preferences, make sure you do not elect to either Quarantine or Delete infected files.


When possibly infected e-mail files are found: - Highlight the entry in the ClamXav window's top pane that needs to be dealt with. - Right-click/Control-click on the entry. - Select "Reveal In Finder" from the pop-up menu. - When the window opens, double-click on the file to open the message in your e-mail client application.


- Read the message and if you agree that it is junk/spam/phishing then use the e-mail client's delete button to delete it (reading it is especially important when the word "Heuristics" appears in the infection name). - If you disagree and choose to retain the message, return to ClamXav and choose "Exclude From Future Scans" from the pop-up menu. - If this is a g-mail account and those messages continue to show up after you have deleted them in the above manner, you may need to log in to webmail using your browser, go to the "All Mail" folder, find the message(s) and use the delete button there to permanently delete them from the server. Then check the "Trash" folder and delete them there.

Mar 17, 2013 1:22 PM in response to AliWonder

AliWonder wrote:


you mean I look for all the files that have 'FOUND' next to them?

Yes.

(Some are showing as in the trash I think because I trashed them?).

That's correct. How they got there is not particularly important right now. The "Win" in the name indicates they are most certainly Windows only malware and it's always good to get rid of it to prevent it from being passed on to any PC users you correspond with. One of them is a fake Firefox applicaiton, also not unusual in the PC world. In any case, emptying the Trash Can at this point should permanently take care of them.

the other files which include this - amghardanna@yahoo.com@imap.mail.yahoo.com/ - are totally weird. This is my late boyfriend's email address. He used to use my computer, and for some reason that 'Mail' thing brings up all of his e-mails, including huge amounts of spam that comes via his Facebook page. I don't know how to stop it doing this.

I would agree that you need not be concerned by any of them. I don't know what would cause Mail to open on it's own, but deleting his account from it would probably be a good idea at this point.


I'm not a Mail user myself, currently have an older version with my setup and only use it for testing purposes, but I think I can walk you through doing that if you would like me to. It would not do anything as far as any of his actual accounts are concerned, just remove it from Mail.


And sorry for your loss....

ClamXav finding trojans; what do I do with them?

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