Author Topic: consrv.dll zeroaccess but no "Safety Settings Service"  (Read 8105 times)

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zerokit

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consrv.dll zeroaccess but no "Safety Settings Service"
« on: February 09, 2012, 09:11:09 PM »
It started with a cpu hog, checked Task Manager and saw ping.exe constant at 50%

I used Kaspersky, Norton, Malware etc.

Then BSOD, so I had to make a Repair CD and regedit from consrv.dll to winsrv.dll
Got back in Windows, everything seemed fine.

Except the fact that consrv.dll is used by csrss.exe

I dont have "Safety Settings Service" in Services.

aswMBR says Win32:Sirefef-H0 [Rtk]

I can post log once it's done scanning.. (First time I clicked "Fix" but the program became unresponsive after putting consrv.dll in quarantine)

Offline Pondus

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #1 on: February 09, 2012, 09:25:01 PM »
follow the guide here and attach the logs
http://forum.avast.com/index.php?topic=53253.0

zerokit

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #2 on: February 09, 2012, 09:51:48 PM »
OTL coming up

Do you need Malwarebytes' Anti-Malware log when it doesnt detect anything?

aswMBR version 0.9.9.1532 Copyright(c) 2011 AVAST Software
Run date: 2012-02-09 20:56:40
-----------------------------
20:56:40.238    OS Version: Windows x64 6.1.7601 Service Pack 1
20:56:40.238    Number of processors: 2 586 0x1706
20:56:40.239    ComputerName: KIMXPS  UserName: kim
20:56:41.046    Initialize success
20:56:44.206    AVAST engine defs: 12020902
20:56:54.839    Disk 0 (boot) \Device\Harddisk0\DR0 -> \Device\Ide\IdeDeviceP1T0L0-2
20:56:54.841    Disk 0 Vendor: FUJITSU_MHZ2320BH_G2 00850009 Size: 305245MB BusType: 11
20:56:54.887    Disk 0 MBR read successfully
20:56:54.890    Disk 0 MBR scan
20:56:54.894    Disk 0 Windows 7 default MBR code
20:56:54.903    Disk 0 Partition 1 80 (A) 07    HPFS/NTFS NTFS          100 MB offset 2048
20:56:54.923    Disk 0 Partition 2 00     07    HPFS/NTFS NTFS        83366 MB offset 206848
20:56:54.928    Disk 0 Partition - 00     0F Extended LBA             71000 MB offset 170940416
20:56:54.958    Disk 0 Partition 3 00     07    HPFS/NTFS NTFS       150776 MB offset 316348416
20:56:54.994    Disk 0 Partition 4 00     07    HPFS/NTFS NTFS        70999 MB offset 170942464
20:56:55.001    Service scanning
20:56:56.417    Modules scanning
20:56:56.422    Disk 0 trace - called modules:
20:56:56.465    ntoskrnl.exe CLASSPNP.SYS disk.sys ataport.SYS PCIIDEX.SYS hal.dll msahci.sys
20:56:56.471    1 nt!IofCallDriver -> \Device\Harddisk0\DR0[0xfffffa80045f4060]
20:56:56.476    3 CLASSPNP.SYS[fffff8800180143f] -> nt!IofCallDriver -> \Device\Ide\IdeDeviceP1T0L0-2[0xfffffa800418f060]
20:56:57.294    AVAST engine scan C:\Windows
20:57:02.139    AVAST engine scan C:\Windows\system32
20:57:20.239    File: C:\Windows\system32\consrv.dll  **INFECTED** Win32:Sirefef-HO [Rtk]
21:01:25.950    AVAST engine scan C:\Windows\system32\drivers
21:01:38.285    AVAST engine scan C:\Users\kim
21:15:40.507    File: C:\Users\kim\AppData\Local\Temp\~Quarantine.aswMBR\consrv.dll  **INFECTED** Win32:Sirefef-HO [Rtk]
21:19:59.359    AVAST engine scan C:\ProgramData
21:21:37.994    Scan finished successfully
21:21:53.260    Disk 0 MBR has been saved successfully to "C:\MBR.dat"
21:21:53.266    The log file has been saved successfully to "C:\aswMBR.txt"


Offline Pondus

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #3 on: February 09, 2012, 09:58:03 PM »
Quote
Do you need Malwarebytes' Anti-Malware log when it doesnt detect anything?
No


OBS: and you need to attach the OTL logs, and save as ANSI......to avoid using multiple post with copy and paste..... see the guide
« Last Edit: February 09, 2012, 09:59:38 PM by Pondus »

zerokit

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #4 on: February 09, 2012, 09:59:07 PM »
OTL attached edit: ANSI version uploaded

Let me know if there's anything else you need.
« Last Edit: February 09, 2012, 10:06:51 PM by zerokit »

Offline essexboy

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #5 on: February 09, 2012, 10:08:07 PM »
Re-Run aswMBR

Click Scan

On completion of the scanClick the   Fix  Button




Save the log as before and post in your next reply

zerokit

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #6 on: February 09, 2012, 11:01:25 PM »
How long will a Fix take?

Once I click Fix there's a new line Moved: C:/...consrv.dll and then the program becomes unresponsive.. if I click in the program there's a Windows sound. This is  third time, I have waited about 1 hour prior

Edit: aswMBR.exe*32 uses 0 cpu and 56 MB ram..
« Last Edit: February 09, 2012, 11:05:11 PM by zerokit »

zerokit

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #7 on: February 09, 2012, 11:42:29 PM »
ComboFix log

zerokit

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #8 on: February 10, 2012, 04:15:43 AM »
Major update..


http://img835.imageshack.us/img835/4357/regeditv.jpg

Everytime I restart service DXEC02 (servicelayer in regedit) avast pops up with a warning about the rootkit

path to execute
C:\Windows\system32\svchost.exe -k netsvcs


A bit puzzled about the other entries.. For instance PolicyAgent has Display name @%SystemRoot%\System32\polstore.dll,-5010
So I searched the web and found this http://www.systemlookup.com/O23/5345-polstore_dll.html
A restart of that service does not make Avast detect anything.
« Last Edit: February 10, 2012, 04:19:30 AM by zerokit »

Offline essexboy

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #9 on: February 10, 2012, 07:51:32 PM »
Ipsec should be running at all times..

According to the combofix log aswMBR killed the consrv.dll and repaired the registry before it locked

How is the computer behaving now ?

zerokit

  • Guest
Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #10 on: February 10, 2012, 08:05:22 PM »
The computer is behaving fine. Thanks for the help.

I stopped IPsec last time I replied here just for good measure. Restarted it now.

The computer has been running fine since stopping DXEC02, and the attempts to establish a connection to my computer (from hundreds of IPs and various ports) has stopped.

Is there a relative easy way to remove the traces of this rootkit? I'm not too keen on having service (though disabled) that can cause a lot of trouble and who knows what else is laying around.

Shouldnt I be worried about the other regedits ? That's the only entries in HKLM\..\services\ in a timestamp of days.

Edit: In case of misunderstanding. The above post about regedit was made after using aswMBR thus consrv.dll and the entries in registry was there after clicking "Fix".
« Last Edit: February 10, 2012, 08:07:51 PM by zerokit »

Offline essexboy

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #11 on: February 10, 2012, 08:46:30 PM »
The service DXEC02 is for the Knowles speech enhancement audio driver..

Do you wish to delete the service ?

Offline essexboy

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #12 on: February 10, 2012, 11:56:25 PM »
Is Avast still alerting as this may be the new variant with a different name

zerokit

  • Guest
Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #13 on: February 11, 2012, 03:48:49 AM »
Avast hasnt detected anything since I repeatedly restarted DXEC02  and I'm not too eager to do it again since I just replaced all my passwords.. But if you need a copy of the virus I can do it.

There's no doubt that this version of the rootkit is disguised as DXEC02.

My hosts file is repaired, I can now edit it myself. Earlier it had a weird entry with a colon in front or behind 127.0.0.1

I'd like to get rid of the service if possible.

Offline essexboy

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Re: consrv.dll zeroaccess but no "Safety Settings Service"
« Reply #14 on: February 11, 2012, 12:47:22 PM »
It is the new variant but it has changed again - so lets kill it

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Be advised that when the fix commences it will shut down all running processes and you may lose the desktop and icons, they will return on reboot

If you have Malwarebytes 1.6 or better installed please disable it for the duration of this run

Run OTL
  • Under the Custom Scans/Fixes box at the bottom, paste in the following
    Quote
    :OTL
    SRV:64bit: - [2009.07.14 02:39:46 | 000,006,656 | ---- | M] (Oak Technology Inc.) [Auto | Running] -- C:\Windows\SysNative\STV680m.dll -- (servicelayer)
    NetSvcs:64bit: servicelayer - C:\Windows\SysNative\STV680m.dll (Oak Technology Inc.)
    [2009.07.14 02:39:46 | 000,051,712 | ---- | M] () MD5=CEF08BD499D029B6E685850CAC86F749 -- C:\Windows\SysNative\consrv.dll

    :Files
    ipconfig /flushdns /c

    :Commands
    [purity]
    [resethosts]
    [emptytemp]
    [CREATERESTOREPOINT]
    [Reboot]
  • Then click the Run Fix button at the top
  • Let the program run unhindered, reboot the PC when it is done
  • Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.