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volume control taskbar icon still misbehaving


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#1 kvon

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Posted 14 December 2008 - 11:18 AM

I just had a hijacked browser, which I think I got rid of by scanning with Malwarebytes' Anti-Malware. Initially I had 3 symptoms: 1) received a delivery failure response from an email I did not send to an address I didn't recognize, 2) hijacked browser - search results redirected, and 3) the volume icon in the taskbar would go away. I could re-enable it through control panel -> sounds & audio devices, but next time I restarted the machine it would be gone again. (I don't know for sure that these 3 symptoms came from the same infection, but they probably did).

Now - the 1st 2 symptoms appear to be gone, but the 3rd one persists. Everything I've researched online about problems like this say to re-install sndvol32.exe from your OS install disk. Did that, no change. Any one else encounter anything like this?

FWIW - here are the pertinent lines from the MWAB log after cleaning the infection:

Registry Data Items Infected:
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowHelp (Hijack.StartMenu) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.

Files Infected:
C:\WINDOWS\system32\sysaudio.sys (Rootkit.Agent) -> Quarantined and deleted successfully.

Any insights appreciated...

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#2 quietman7

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Posted 14 December 2008 - 02:40 PM

Fake sysaudio.sys causes Searchengine Hijack

Its possible sndvol32.exe was corrupted. Go to the C:\Windows\System32\dllcache folder and locate the sndvol32.exe file. Right-click on it and choose copy. Go to the C:\Windows\System32 folder, open it and paste a copy of the file there. Let it overwrite the existing copy if present.
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#3 kvon

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Posted 14 December 2008 - 03:54 PM

I assume you meant to do this with the sysaudio.sys file, since that what the blog mentions... At any rate, I've now replaced both the sysaudio.sys and sndvol32.exe file, still no change.

Interesting(?) side note - if I re-enable the volume icon then *restart* the computer (start menu -> shutdown -> restart), it's still there after reboot. But if I do a total shutdown followed by a manual restart then it's gone. Hmmmm...




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