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Contributor
LKaven
Posts: 27
Registered: ‎07-14-2012

Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

Dell Studio 540S, Vista SP2 32 bit.  New (paid) user to Norton 360.  

 

Fake Flash installer was first symptom, followed by popups and browser redirects.  

 

Ran Malware Bytes, which detected ZeroAccess.B, but removal ineffective and infection detected repeatedly.  Norton 360 cannot remove it entirely, but it blocks it /most/ of the time.  One variant does not respond to deletion by Norton AV.  Norton manual removal tool does not remove.  Norton PowerEraser does not remove.  

 

Fake flash installer runs every few minutes, followed by a flurry of Norton detections, mostly blocked, but not all.  One variant of ZeroAccess.B remains.  Norton now detects Trojan.Gen and Trojan.Gen.2

 

Does anyone have insight into removing these stubborn variants?  It seems like the team is hard at work!

 

 

Contributor
LKaven
Posts: 27
Registered: ‎07-14-2012

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

Intended to say that I have a flash drive if needed.

Bot Obliterator
Quads
Posts: 13,245
Registered: ‎07-21-2008

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

[ Edited ]

ANY other user other than the thread starter is not to use any instructions, scripts or proceedures,  The work though in cleaning a system is individual and only for that system due to a number of factors.

 


 

Please do not run any tools unless instructed to do so. 

  • We ask you to run different tools in a specific order to ensure the malware is completely removed from your machine, and running any additional tools may detect false positives, interfere with our tools, or cause unforeseen damage or system instability. Do as the instructions ask nothing extra or run things twice
  • If I ask a Question just answer it, don't run anything unless it states.
  • Major steps used:

1. Find

2. Break

3. Destroy

4. Cleanup  (including system as a whole)

 

Please read every post completely before doing anything. 

  • Pay special attention to the NOTE: lines, these entries identify an individual issue or important step in the cleanup process.

 

  • Logs from malware removal programs (OTL is one of them) can take some time to analyze. I need you to be patient while I analyze any logs you post. Please remember, I am a volunteer, and I do have a life outside of these forum, (sometimes :smileylol:)

  • Attention to detail is important! Since I cannot see or directly interact with your computer I am dependent on you to "be my eyes" and provide as much information as you can regarding the current state of your computer.

 

Step 1

 

Read Slowly and all of it.

 

Please download http://www.bleepingcomputer.com/download/farbar-recovery-scan-tool/  Download the 32bit version


Transfer it on to the Flash Drive

Enter System Recovery Options

To enter System Recovery Options from the Advanced Boot Options:

  • Restart the computer.
  • As soon as the BIOS is loaded begin tapping the F8 key until Advanced Boot Options appears.
  • Use the arrow keys to select the Repair your computer menu item.
  • Choose your language settings, and then click Next.
  • Select the operating system you want to repair, and then click Next.
  • Select your user account and click Next.


On the System Recovery Options menu you will get the following options:

 

Startup Repair
System Restore
Windows Complete PC Restore
Windows Memory Diagnostic Tool
Command Prompt


  • Select Command Prompt
  • In the command window type in notepad and press Enter.
  • The notepad opens. Under File menu select Open.
  • Select "Computer" and find your flash drive drive letter and close the notepad.
  • In the command window type e:\frst.exe (for x64 bit version type e:\frst64) and press Enter
    Note: Replace letter e with the drive letter of your portable hard drive
  • The tool will start to run.
  • When the tool opens click Yes to disclaimer.
  • Press Scan button.
  • It will make a log (FRST.txt) on the flash drive.  restart the system and load Windows Pleaseattach the log in  your reply back..

 

Quads

Contributor
LKaven
Posts: 27
Registered: ‎07-14-2012

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

Thank you!  Running now.  Back in a few minutes.

Contributor
LKaven
Posts: 27
Registered: ‎07-14-2012

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

Results attached.

Bot Obliterator
Quads
Posts: 13,245
Registered: ‎07-21-2008

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

Uninstall

 

Malwarebytes

Spybot S&D

 

Quads

Contributor
LKaven
Posts: 27
Registered: ‎07-14-2012

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

This is now done!

Bot Obliterator
Quads
Posts: 13,245
Registered: ‎07-21-2008

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

What did TDSSkiller find??

 

Quads

Contributor
LKaven
Posts: 27
Registered: ‎07-14-2012

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

Many hours ago.  I believe it found evidence of a rootkit, and I took its recommendation.  A suspicious pair of files appeared in \windows around the time of the infection  FlashPlayerApp.exe and FlashPlayerCPLApp.cpl.  I manually moved these into a safe folder.

 

SFC found integrity problems with services.exe and restored.  At this point I committed to N360.   N360 found one "@" file it identified as a Trojan.Gen and suggested single file delete as probably fix.  Then I found your forum.  Had I seen your forum first, I would have stopped there immed. of course and done nothing further.

 

In the last 2.5 hours, N360 has blocked only one thing, an attempt by SVCHOST to set a registry security key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_BHDRVX86\0000\CONTROL\

Bot Obliterator
Quads
Posts: 13,245
Registered: ‎07-21-2008

Re: Persistent Trojan.ZeroAccess.B, Trojan.Gen & Trojan.Gen.2

I asked what did it find not all THAT.

 

File location etc.

 

Quads