Home Malware Programs Backdoors Backdoor.Proxybox


Posted: July 10, 2012

Threat Metric

Threat Level: 6/10
Infected PCs: 126
First Seen: July 10, 2012
OS(es) Affected: Windows

Backdoor.Proxybox is a backdoor Trojan that's used to facilitate illegal proxy server botnets. These botnets are rented out to other criminals, which makes the potential attacks linked to Backdoor.Proxybox literally only restricted by the money and creativity of Backdoor.Proxybox's customers. SpywareRemove.com malware researchers have found indications of Backdoor.Proxybox having tens of thousands of bots available at the time of this article's writing – although Backdoor.Proxybox may include additional bots beyond these numbers that aren't utilized simultaneously. PCs are most likely to suffer Backdoor.Proxybox infections after contact with online exploits such as Blacole. As a PC threat that utilizes backdoor exploits and tries to avoid detection, Backdoor.Proxybox should be considered a mid-to-high-level threat, and, for a minimum of system damage incurred, deleting Backdoor.Proxybox should use anti-malware products that are appropriate to the procedure.

Don't Let Your PC Be the Crossroads for Backdoor.Proxybox's Criminal Profits

Backdoor.Proxybox is, like many backdoor Trojans, used for the purpose of recruiting infected PCs into bot-based networks. These collections of Backdoor.Proxybox-infected computers are then put to work at other tasks as instructed by Command & Control servers. Access to Backdoor.Proxybox servers uses a rental system, with hundreds of servers available for under thirty dollars and an unlimited number of servers available for a slightly higher price. Accordingly, any criminal who buys in to the Backdoor.Proxybox system can instruct a Backdoor.Proxybox-infected PC to engage in many types of attacks, of which SpywareRemove.com malware analysts have noted some of the most common:

  • Distribution of malicious programs (including, potentially, Backdoor.Proxybox) through SMTP spam e-mails, messaging-account spam and similar attacks. The majority of such attacks will fail to display on the end of the PC user who is using the infected computer.
  • Denial-of-Service strikes that overwhelm websites with inflated traffic by navigating to the site repeatedly – usually, until the site in question crashes.
  • Attempts to steal passwords and other private information through man-in-the-browser attacks, code-injected phishing lures, keylogging, screen-capturing, etc.
  • Efforts at installing other malicious programs to enable the above attacks or other ones.
  • Disabling security-related features and programs. Windows Task Manager and Windows Firewall are often disabled routinely by backdoor Trojans like Backdoor.Proxybox.

Shutting Down Backdoor.Proxybox's Path to Illicit Riches

Backdoor.Proxybox uses multiple components to coordinate its attacks, like most PC threats concerned with handing control of your PC over to criminal entities, tries to avoid displaying obvious symptoms. In some cases, functions related to Backdoor.Proxybox's botnet may cause poor system performance (lag, stuttering, unresponsiveness or crashes) due to the potentially high amount of resources that Backdoor.Proxybox can use. However, SpywareRemove.com malware experts temper this by mentioning that even this minor symptom isn't certain to appear as a warning of a Backdoor.Proxybox infection.

Backdoor.Proxybox also uses rootkit technology to conceal itself from detection by security products and to enable its automatic startup. In such cases, SpywareRemove.com malware experts recommend against trying to find or remove the relevant PC threat without anti-malware products that are designed to counter them explicitly. Failure to remove Backdoor.Proxybox with appropriate software is likely to harm your OS, necessitating a reinstall.


Generic Malware [Panda]BackDoor.Agent.ARMF [AVG]W32/Agent.DEOE!tr.rkit [Fortinet]Trojan.Rootkit [Ikarus]Trojan/Win32.Agent.gen [Antiy-AVL]TR/Rootkit.Gen [AntiVir]Trojan.NtRootKit.14541 [DrWeb]UnclassifiedMalware [Comodo]Mal/Generic-L [Sophos]Rootkit.Win32.Agent.deoe [Kaspersky]Win32.Backdoor.Proxy [eSafe]Win32:Malware-gen [Avast]Backdoor.ProxyBox [Symantec]RootKit [K7AntiVirus]Generic.dx!bf3j [McAfee]
More aliases (28)

Use SpyHunter to Detect and Remove PC Threats

If you are concerned that malware or PC threats similar to Backdoor.Proxybox may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.

Download SpyHunter's Malware Scanner

Note: SpyHunter's free version is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware tool to remove the malware threats. Learn more on SpyHunter. If you would like to uninstall SpyHunter for any reason, please follow these uninstall instructions. To learn more about our policies and practices, visit our EULA, Privacy Policy and Threat Assessment Criteria .

Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.

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:

\??\c:\users\jerry n kim\appdata\roaming\adobe\rxsupply.sys File name: rxsupply.sys
Size: 21.5 KB (21504 bytes)
MD5: 86908d0c072ce28a7650b78bab5a06e5
Detection count: 126
File type: System file
Mime Type: unknown/sys
Path: \??\c:\users\jerry n kim\appdata\roaming\adobe\
Group: Malware file
Last Updated: October 15, 2012
7_24e5ba.exe File name: 7_24e5ba.exe
Size: 220.67 KB (220672 bytes)
MD5: 24e5ba364afcaa1a4754a8902301c312
Detection count: 6
File type: Executable File
Mime Type: unknown/exe
Group: Malware file
Last Updated: July 11, 2012
%SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\rxsupply.sys File name: %SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\rxsupply.sys
File type: System file
Mime Type: unknown/sys
Group: Malware file
%SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\fs.cfg File name: %SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\fs.cfg
Mime Type: unknown/cfg
Group: Malware file
%SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\sp.dll File name: %SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\sp.dll
File type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{CLSID Path}HKEY_CLASSES_ROOT\sp\CLSID\"(Default)" = "{96AFBE69-C3B0-4b00-8578-D933D2896EE2}"HKEY_CLASSES_ROOT\CLSID\{96AFBE69-C3B0-4b00-8578-D933D2896EE2}\InProcServer32\"(Default)" = "%SystemDrive%\Documents and Settings\All Users\Application Data\Microsoft\sp.DLL"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved\"{96AFBE69-C3B0-4b00-8578-D933D2896EE2}" = "sp"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers\sp\"(Default)" = "{96AFBE69-C3B0-4b00-8578-D933D2896EE2}"HKEY..\..\{Value}HKEY_CLASSES_ROOT\CLSID\{96AFBE69-C3B0-4b00-8578-D933D2896EE2}\InProcServer32\"(Default)" = "%SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\sp.DLL"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\"ImagePath" = "%System%\svchost.exe -k netsvc"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\Enum\"0" = "Root\LEGACY_SHTST\0000"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\Parameters\"ServiceDll" = "%SystemDrive%\Documents and Settings\All Users\Application Data\Microsoft\sp.DLL"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\Parameters\"ServiceDll" = "%SystemDrive%\Documents and Settings\All Users\Application Data\Adobe\sp.dll""HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\"netsvc" = "SPService, m"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\FsFilter\"ImagePath" = "%SystemDrive%\Documents and Settings\All Users\Application Data\adobe\rxsupply.sys"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost\"netsvc" = "SPService, J"HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\"%System%\svchost.exe" = "%System%\svchost.exe:*:Enabled:svchost.exe"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List\"%System%\svchost.exe" = "%System%\svchost.exe:*:Enabled:svchost.exe"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\"Type" = "110"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\"ObjectName" = "LocalSystem"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\"ErrorControl" = "1"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\"Start" = "2"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\Enum\"NextInstance" = "1"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SPService\Enum\"Count" = "1"