Home Malware Programs Downloaders Downloader.Castov.B

Downloader.Castov.B

Posted: August 13, 2013

Threat Metric

Ranking: 3,445
Threat Level: 7/10
Infected PCs: 45,460
First Seen: August 13, 2013
Last Seen: May 17, 2023
OS(es) Affected: Windows

Downloader.Castov.B is a Trojan that downloads other PC threats onto the targeted PC. When Downloader.Castov.B is executed, it creates the potentially malicious files: Downloader.Castov.B creates the registry entries so that it can run automatically every time Windows is started. In order to get the infected computer's IP address, the Trojan connects to the certain remote location. Downloader.Castov.B may then strive to access the Tor anonymity network using one of the certain domains. Downloader.Castov.B may then download additional files onto the corrupted PC.

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Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:



%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\libeay32.dll File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\libeay32.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\ssleay32.dll File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\ssleay32.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\config.ini File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\config.ini
Mime Type: unknown/ini
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\alg.exe File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\alg.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\spoolsv.exe File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\spoolsv.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\svchost.exe File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\svchost.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe File name: %UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe
Mime Type: unknown/exe
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"mdm" = "\"%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\mdm.exe\""HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"svchost" = "\"%UserProfile%\Application Data\Identities\{d79365c0-2a26-11e0-87a4-806d6172696f}\svchost.exe\""
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