Backdoor.Korplug.B
Posted: December 11, 2013
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
Threat Level: | 8/10 |
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Infected PCs: | 35 |
First Seen: | December 11, 2013 |
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Last Seen: | December 8, 2020 |
OS(es) Affected: | Windows |
Backdoor.Korplug.B is a backdoor Trojan designed to steal personal information while preventing the PC user from detecting its presence. Although Backdoor.Korplug.B's distribution still is in low numbers, its ability to steal information through generalized spyware functions isn't to be underestimated, and malware experts would suggest that you change all passwords after dealing with a confirmed Backdoor.Korplug.B infection. With many of its components disguised to look like legitimate Mozilla-related products, deleting Backdoor.Korplug.B is a job that should be left to anti-malware tools.
The Spy that Pretends to Be Sent by Mozilla
Backdoor.Korplug.B is a simple but effective backdoor Trojan with secondary functions of types that usually are attributed to spyware. During its installation, Backdoor.Korplug.B uses the Mozilla brand name liberally to disguise its Registry entries and files, with the result of most of its software appearing to be harmless to scans undertaken by the human eye. Although Backdoor.Korplug.B does create a visible system service, this service is mislabeled as a 'Mozilla Maintenance' service. Finally, Backdoor.Korplug.B injects itself into Svchost.exe, a standard component of the Windows OS.
One of the files under Backdoor.Korplug.B's Mozilla disguise, Trend2013.dat, is used for keylogging attacks that monitor your keyboard input. Any information typed through your keyboard is recorded to an external log, which then is transferred to criminals. Malware researchers often find such attacks to be the sources behind account hijacks and related security compromises.
Of course, to transfer this file, Backdoor.Korplug.B also needs to open a backdoor on your PC. Through this backdoor, criminals often initiate other attacks, such as installing new threats or controlling the PC's system settings. A quick response to a Backdoor.Korplug.B infection is crucial for minimizing the potential damage that criminals may cause to your computer, although malware researchers warn that you may or may not see any symptoms during the attacks.
Plugging Up the Security Hole Drilled by Backdoor.Korplug.B
Backdoor.Korplug.B appears to be heavily reliant on its disguise as a way to keep itself installed on your PC. Once noticed, Backdoor.Korplug.B doesn't have major defenses against most updated anti-malware products, and removing Backdoor.Korplug.B with these programs should be a simple affair. However, as usual, the catch is noticing Backdoor.Korplug.B in the first place, which may be difficult in environments that don't benefit from passive anti-malware protection.
With Backdoor.Korplug.B removed, your next step always should be to verify the safety of any potentially compromised information, as well as the safety of your PC. Change passwords, security questions and other pertinent information that may have been stolen by Backdoor.Korplug.B. Check your firewall program for full functionality, and be sure to close any network ports that weren't open prior to the Backdoor.Korplug.B attack. Malware analysts emphasize that a rapid, comprehensive response will keep a temporary Backdoor.Korplug.B infection from becoming a long-term issue.
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:%AllUsersProfile%\Mozilla\WINMM.dll
File name: %AllUsersProfile%\Mozilla\WINMM.dllFile type: Dynamic link library
Mime Type: unknown/dll
Group: Malware file
%AllUsersProfile%\Mozilla\Trend2013.dat
File name: %AllUsersProfile%\Mozilla\Trend2013.datFile type: Data file
Mime Type: unknown/dat
Group: Malware file
%AllUsersProfile%\Mozilla\WINMM.dll.rom
File name: %AllUsersProfile%\Mozilla\WINMM.dll.romMime Type: unknown/rom
Group: Malware file
Registry Modifications
HKEY..\..\{Value}HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\Control\"*NewlyCreated*" = "0"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\"Service" = "Mozilla Maintenance"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\"Legacy" = "1"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\"ConfigFlags" = "0"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\"Class" = "LegacyDriver"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\"ClassGUID" = "{8ECC055D-047F-11D1-A537-0000F8753ED1}"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\"DeviceDesc" = "Mozilla Maintenance Service"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\"NextInstance" = "1"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\Enum\"0" = "Root\LEGACY_MOZILLA_MAINTENANCE\0000"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\Enum\"Count" = "1"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\Enum\"NextInstance" = "1"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\Security\"Security" = "[HEXIDECIMAL NUMBER]"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"Type" = "272"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"Start" = "2"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"ErrorControl" = "0"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"ImagePath" = "%AllUsersProfile%\Mozilla\DNSBench.exe"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"DisplayName" = "Mozilla Maintenance Service"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"ObjectName" = "LocalSystem"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\"Description" = "Mozilla Maintenance Service"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ServiceCurrent\"" = "[ORIGINAL VALUE + 1]" HKEY..\..\..\..{Subkeys}HKEY_LOCAL_MACHINE\SOFTWARE\Classes\FASTHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCEHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\LEGACY_MOZILLA_MAINTENANCE\0000\ControlHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla MaintenanceHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\SecurityHKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Mozilla Maintenance\EnumHKEY_LOCAL_MACHINE\SOFTWARE\Classes\FAST\CLSID: [HEXIDECIMAL NUMBER]
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