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MBR Olmasco.O trojan


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2 replies to this topic

#1 littlebam

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Posted 16 August 2011 - 01:46 PM

Hi,

I have been recommended to post here and to include a DDS log. Referred from here: http://www.bleepingcomputer.com/forums/topic414635.html ~ OB

I believe I have a virus in my MBR which i have been unable to clean. I downloaded a piece of software which turned out not to be what it was supposed to be and after a day or so I experienced the following symtoms.

1. the application ran but did not appear to do anything.
2. the following day when i started the system, Win 7 Ultimate 64 bit,sp1, it appeared normal but then the background turned black, desktop icons and folders disappeared and then I received a series of Disk Error messages and "attrib.exe" errors.
3. There was no anti-virus software running at the time.
4. I rebooted the machine and completed a sytem restore to a few days previous. This created a stable system.
5.I booted the system with an uptodate ESET SysRescue USB device and completed a scan.
6. It detected 15 infections, and successfully cleaned 9 of them.
7. It is unable to clean 5 instances, with the following error report:
Name: MBR sector of the 0. physical disk.
Threat: Win32/Olmasco.o trojan
8.I have completed on-line scans from ESET and Kaspersky, neither detected any problems.
9. I have installed and ran TDSSKiller, Ver. 2.5.15.0 from Kaspersky Lab, it also detected nothing.
10. I have installed the latest Spybot, with no problem found.
11. I also removed the harddisk and connected it,via USB, to another machine running Virus Vault - it detected nothing.
12. The ESET sysRescue continues to detect 5 instances of the same threat and fails to clean them.

i have attached the DDS reports as requested.

Thanks and regards

Attached Files


Edited by Orange Blossom, 16 August 2011 - 07:25 PM.


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#2 HelpBot

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Posted 21 August 2011 - 01:50 PM

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We apologize for the delay in responding to your request for help. Here at Bleeping Computer we get overwhelmed at times, and we are trying our best to keep up. Please note that your topic was not intentionally overlooked. Our mission is to help everyone in need, but sometimes it takes just a little longer to get to every request for help. No one is ignored here.

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We need to see some information about what is happening in your machine. Please perform the following scan again:

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#3 HelpBot

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Posted 26 August 2011 - 01:55 PM

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