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Windows 7: BSOD on start up, Error 0x0000007B

03 Nov 2012   #51
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by doiob View Post
Ok im doing the #12 now. Earlier today i was running the avg scan it took an incredible long time but that was to be expected however it ended at 54% on a java file with the message Scan ended with unknown return code!
Very strange. View things about the state now.
  • AVG is still installed but some files/folders have been renamed. You have to reinstall it later and remove the renamed stuff.
  • TDDS rootkit has been killed but not totally! Or at least there is corrupt stuff now
  • TDDS can download/install all sorts of malware/viruses on it's own. Most likely many virusses are on your system. Impossible to proof system is clean.
  • An offline virusscan (so boot from DVD) is the best thing to (try to) clean them. In win7 the virus is active and can fool the antivirus!
The stop 7B is an error in th AHCI and/or IDE driver stuff.

atapi.sys, msahci.sys, iastor.sys, iastorv.sys most likely some (or all) of them have been infected.

It's a very nasty rootkit!! Allmost impossible to clean totally.

Do you have many applications on system? Many special settings? What I mean... is a reinstall a total dissaster for you?


My System SpecsSystem Spec
.
03 Nov 2012   #52
doiob

 
 

Ok i ran it again this is what i got.
hklm\win7sys\system\select /v default couldnt find the reg key
msahci = 0x0
pciide = 0x3
atapi = 0x0
iastor = 0x0
iastorv =0x3

Those were the results. i will try and get hklm\win7sys\system\select /v default to work.
My System SpecsSystem Spec
03 Nov 2012   #53
doiob

 
 

I would prefer to avoid a re install but im no fool i have known for some time that it has been on the cards. I would like to regain control of the computer one last time but i expect this to be the last hara for this install of windows. Yes you were right about the viruses according to avg before it stopped it found countless. if there is no solution by monday night here i will most like back as much as possible with Ubuntu and then re install. Yes this was my first tango with a rootkit, i had never in-counted one before so my early countermeasures were completely ineffectual. I had believed i had gotten the last laugh but perhaps it was premature. At the very least this last week has taught me much about computers in general.
My System SpecsSystem Spec
.

03 Nov 2012   #54
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by doiob View Post
Ok i ran it again this is what i got.
hklm\win7sys\system\select /v default couldnt find the reg key
msahci = 0x0
pciide = 0x3
atapi = 0x0
iastor = 0x0
iastorv =0x3

Those were the results. i will try and get hklm\win7sys\system\select /v default to work.
My fault... command is different! I editted post 12.
My System SpecsSystem Spec
03 Nov 2012   #55
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

msahci = 0x0=>starts on boot...fine
pciide = 0x3=>no ide on boot...quite normal
atapi = 0x0=>starts on boot...fine
iastor = 0x0=>starts on boot...fine. It's the INTEL SATA storage driver
iastorv =0x3=>no iastorv on boot....quite normal. You use iastor instead
My System SpecsSystem Spec
03 Nov 2012   #56
doiob

 
 

Results for the first line default = 0x1
My System SpecsSystem Spec
03 Nov 2012   #57
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

Quote   Quote: Originally Posted by doiob View Post
I would prefer to avoid a re install but im no fool i have known for some time that it has been on the cards. I would like to regain control of the computer one last time but i expect this to be the last hara for this install of windows. Yes you were right about the viruses according to avg before it stopped it found countless. if there is no solution by monday night here i will most like back as much as possible with Ubuntu and then re install. Yes this was my first tango with a rootkit, i had never in-counted one before so my early countermeasures were completely ineffectual. I had believed i had gotten the last laugh but perhaps it was premature. At the very least this last week has taught me much about computers in general.
Why the heck don't you make backups!!
You have a win7 installation DVD? Valid license? You know how to reinstall? You know how to backup this instance of win7 (for example with ubuntu) and restore files later? Only restore documents like mp3,doc,xls,jpg etc! Not system files!
My System SpecsSystem Spec
03 Nov 2012   #58
doiob

 
 

I back up all my work files at the end of every trimester so i only need to retake some files. I have the sintallation DVD + valid license. No i do not know how to back up instances of windows 7 and would love to learn how if you have the time. My laptop has a feature that automatically restores it to the factory state purging everything that is what i will use.
My System SpecsSystem Spec
03 Nov 2012   #59
Kaktussoft

Microsoft Community Contributor Award Recipient

Microsoft Windows 7 Home Premium 64-bits 7601 Multiprocessor Free Service Pack 1
 
 

First totally clean your disk using diskpart clean (clean all is not necessary). Clean overwrites only the first 1MB on physical disk.... and that's were MBR and partition table are located. Fast and enough in this case.
If course to be done in "recovery environment">command prompt. Now you are sure rootkit is totally vanished
Disk - Clean and Clean All with Diskpart Command

Clean Install Windows 7
My System SpecsSystem Spec
03 Nov 2012   #60
doiob

 
 

I do have one question regarding partitions. Say for example something like this were to happen again and the OS was corrupted in some way. If i had the OS on its own partition ( a: ) and my programs and files on an other ( b: ) could i re install windows over a: with out wiping b:?

If it got to this stage again i would simply re-install this is simply an example
My System SpecsSystem Spec
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 BSOD on start up, Error 0x0000007B




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