RBCalc Trojan

Removing RBCalc
Categories: Trojan,Spyware,Backdoor
This category includes a variety of Trojans that damage victim machines or
threaten data integrity, or impair the functioning of the victim machine.
Spyware is computer software that is installed surreptitiously on a personal computer
to intercept or take partial control over the user's interaction
with the computer, without the user's informed consent.

While the term spyware suggests software that secretly monitors the user's behavior,
the functions of spyware extend well beyond simple monitoring.

Spyware programs can collect various types of personal information,
such as Internet surfing habit, sites that have been visited,
but can also interfere with user control of the computer in other ways,
such as installing additional software, redirecting Web browser activity,
accessing websites blindly that will cause more harmful viruses,
or diverting advertising revenue to a third party.

Spyware can even change computer settings, resulting in slow connection speeds,
different home pages, and loss of Internet or other programs.
In an attempt to increase the understanding of spyware, a more formal classification
of its included software types is captured under the term privacy-invasive software.
Backdoors are the most dangerous type of Trojans and the most popular.
Backdoors open infected machines to external control via Internet.
They function in the same way as legal remote administration programs used by system administrators.
This makes them difficult to detect.

Backdoors are installed and launched without the consent of the user of computer.
Often the backdoor will not be visible in the log of active programs.

Once a backdoor has been successfully launched, the computer is wide open.
Backdoor functions can include:

• Launching/ deleting files


• Sending/ receiving files


• Deleting data


• Displaying notification


• Rebooting the machine


• Executing files

Backdoors are used by virus writers to detect and download confidential information,
execute malicious code, destroy data, include the machine in bot networks and so forth.
Backdoors combine the functionality of most other types of in one package.

Backdoors have one especially dangerous sub-class: variants that can propagate like worms.

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Visible Symptoms:
Files in system folders:
[%SYSTEM%]\comclg32.dll
[%SYSTEM%]\d3dclsrv.dll
[%SYSTEM%]\ndsdavsrv.sys
[%SYSTEM%]\utlsrv.exe
[%SYSTEM%]\comclg32.dll
[%SYSTEM%]\d3dclsrv.dll
[%SYSTEM%]\ndsdavsrv.sys
[%SYSTEM%]\utlsrv.exe

How to detect RBCalc:

Files:
[%SYSTEM%]\comclg32.dll
[%SYSTEM%]\d3dclsrv.dll
[%SYSTEM%]\ndsdavsrv.sys
[%SYSTEM%]\utlsrv.exe
[%SYSTEM%]\comclg32.dll
[%SYSTEM%]\d3dclsrv.dll
[%SYSTEM%]\ndsdavsrv.sys
[%SYSTEM%]\utlsrv.exe

Registry Keys:
HKEY_LOCAL_MACHINE\system\controlset001\services\ndsdavsrv
HKEY_LOCAL_MACHINE\system\currentcontrolset\enum\root\legacy_ndsdavsrv

Registry Values:
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run

Removing RBCalc:

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