How do I remove an email virus

My wife's email account is now sending out spam messages to those in her address book? She obviously clicked through on the wrong message and now I've got to try to find the problem and get it fixed. What do you recommend for a Mac.

IMAC Intel2.0 Ghz, 1Gb RAM, Mac OS X (10.5.1)

Posted on Jan 25, 2012 2:38 AM

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9 replies

Jan 25, 2012 5:55 AM in response to kstads

http://www.cites.illinois.edu/security/idtheft/phishing/spoofing.html


This is most likely not the result of a "virus" (no viruses exist for OS X), or malware. But if you want to scan your Mail, you can use ClamXav. If it finds anything, it will probably only be some harmless Windows malware, which will not affect a Mac.


http://www.clamxav.com/download.php


Here is the current ClamX OS X malware catalog


daily.cvd not-OSX.Tored

daily.cvd OSX.Flashback-1

daily.cvd OSX.Flashback-3

daily.cvd OSX.Flashback-2

daily.cvd OSX.Flashback-4

daily.cvd Trojan.OSX.Miner

daily.cvd OSX.Defma

daily.cvd MacOSX.Revir-1

daily.cvd OSX.BlackHol

daily.cvd OSX.BlackHol-1

daily.cvd MacOSX.iMuler-1

daily.cvd Trojan.OSX.FlashBack.A

daily.cvd OSX.DevilRobber

main.cvd OSX.RSPlug

main.cvd Trojan.OSX.iservices.A

main.cvd Trojan.OSX.iservices.B

main.cvd OSX.DNSChanger.dmg

main.cvd OSX.DNSChanger.dmg-1

main.cvd Trojan.OSX.RSPlug.F.dmg

main.cvd Trojan.OSX.RSPlug.F.dmg-1

main.cvd Trojan.OSX.RSPlug.F.dmg-2

main.cvd Trojan.OSX.RSPlug.F.dmg-3

main.cvd Trojan.OSX.RSPlug.F.dmg-4

main.cvd Trojan.OSX.RSPlug.F.dmg-5

main.cvd Trojan.OSX.RSPlug.G.dmg

main.cvd Trojan.OSX.RSPlug.G

main.cvd Exploit.OSX.Safari

main.cvd Trojan.OSX.Cowhand

main.cvd Backdoor.OSX.BlackHole

main.cvd Trojan.Downloader.OSX

main.cvd OSX.Flashback

main.cvd Trojan.Downloader.OSX-1

main.cvd OSX.DNSChanger

main.cvd OSX.Trojan-2

main.cvd Trojan.OSX.Opener

main.cvd Trojan.OSX.RSPlug.C

main.cvd Trojan.OSX.RSPlug.D

main.cvd OSX.Tored

main.cvd OSX.RSPlug-2

main.cvd Trojan.OSX.OpinionSpy.B

main.cvd Trojan.OSX.OpinionSpy.A

main.cvd Trojan.OSX.MacDefender

main.cvd Trojan.OSX.MacDefender.B

main.cvd Trojan.OSX.MacDefender.C

main.cvd OSX.Defma-1

main.cvd OSX.Defma-2

main.cvd Trojan.OSX.MacBack

main.cvd Trojan-Downloader.OSX.Fav.A

main.cvd Trojan-Downloader.OSX.Fav.B

Jan 25, 2012 5:51 AM in response to kstads

Your Mac may have been infected by a Botnet (Trojan) and you need to inform your ISP.


If you allow a Trojan to be installed, the user's DNS records can be modified, redirecting incoming internet traffic through the attacker's servers, where it can be hijacked and injected with malicious websites and pornographic advertisements. The trojan also installs a watchdog process that ensures the victim's (that's you!) DNS records stay modified on a minute-by-minute basis.


You can read more about how, for example, the OSX/DNSChanger Trojan works (by falsely suggesting extra codecs are required for Quicktime) here:


http://www.f-secure.com/v-descs/trojan_osx_dnschanger.shtml


SecureMac has introduced a free Trojan Detection Tool for Mac OS X. It's available here:


http://macscan.securemac.com/


First update the MacScan malware definitions before scanning. You can also contact their support team for any additional support - macsec@securemac.com


The DNSChanger Removal Tool detects and removes spyware targeting Mac OS X and allows users to check to see if the trojan has been installed on their computer; if it has, the software helps to identify and remove the offending file. After a system reboot, the users' DNS records will be repaired.


(Note that a 30 day trial version of MacScan can be downloaded free of charge from:


http://macscan.securemac.com/buy/


and this can perform a complete scan of your entire hard disk. After 30 days free trial the cost is $29.99. The full version permits you to scan selected files and folders only, as well as the entire hard disk. It will detect (and delete if you ask it to) all 'tracker cookies' that switch you to web sites you did not want to go to.)

Jan 25, 2012 6:04 AM in response to Klaus1

Klaus, I haven't heard of any recent infections. This was from 2009 and only resulted from downloading pirated versions of iWork or Photoshop CS4 from Torrent sites. If the OP hasn't done that -- and I'm not even sure this is possible any longer -- then I wonder if this isn't a false alarm?


iServices trojan, OSX.Trojan.iServices.A and OSX.Trojan.iServices.B


Do you have any evidence this Trojan is still circulating, or circulating in some other form? Are you, perhaps, being unnecessarily alarming?

Jan 25, 2012 6:15 AM in response to Klaus1

Much more likely a spammer got a hold of the email address and is using that spoofed on a PC botnet. Doesn't mean the computer has been hacked. But if the Address Book has been stolen by someone sniffing the Mail ID and Password, best to change those ASAP.


Don't know if Apple ever fixed this.


http://www.cultofmac.com/52169/safari-exploit-allows-address-book-data-to-be-eas ily-stolen-through-autofill/


Message was edited by: WZZZ

Jan 25, 2012 11:12 PM in response to WZZZ

WZZZ wrote:


Much more likely a spammer got a hold of the email address and is using that spoofed on a PC botnet. Doesn't mean the computer has been hacked. But if the Address Book has been stolen by someone sniffing the Mail ID and Password, best to change those ASAP.

Yes, the fact that people she knows are getting emails would indicate that they have access to her email server where they can harvest addresses of those she has sent to. Some e-mail servers have the contact list on the server, as well. Changing the password is definitely in order.

Don't know if Apple ever fixed this.


http://www.cultofmac.com/52169/safari-exploit-allows-address-book-data-to-be-eas ily-stolen-through-autofill/

I don't know either as there was no announcement and Jeremiah hasn't updated his assertions in over a year. I would think that would only work against the users Address Book page from the description.


I've had AutoFill turned off since September 2010, so I turned it back on and went to theproof of concept page where it no longer finds anything, so maybe they did fix it. Guess I should try to ask Jeremiah about it.

Feb 1, 2012 2:45 AM in response to MadMacs0

All,


Thanks for the thorough discussion on this topic.


I am having the same issue right now. I haven't logged into email (except on my iPhone) for several days, and yesterday I apparently started spamming my contacts. My ISP (Brighthouse networks) is claiming I have a virus and I need to fix this on my end as they have software that prevents this sort of thing (so claimed the chatroom tech who had a very poor command of english). I am doing a complete system scan using SOPHOS and so far (about 75% done as I write this) have found nothing. Not that I expected a MAC to have a virus, but better safe than sorry.


If I read this string correctly, if I change my email password I should be ok? No need to delete the account and open a new one?

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How do I remove an email virus

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