Submission Summary:

What's been foundSeverity Level
Produces outbound traffic.
Contains characteristics of an identified security risk.


Technical Details:


Possible Security Risk

Threat CategoryDescription
A malicious backdoor trojan that runs in the background and allows remote access to the compromised system


File System Modifications

#Filename(s)File SizeFile HashAlias
1 %AppData%\Microsoft\Installer\{B53D42E8-872B-430E-82D4-80065A31FCE1}\lpk.dll
[pathname with a string SHARE]\lpk.dll
[pathname with a string SHARE]\lpk.dll
[pathname with a string SHARE]\lpk.dll
%ProgramFiles%\Internet Explorer\Connection Wizard\lpk.dll
%ProgramFiles%\Internet Explorer\lpk.dll
35,328 bytes MD5: 0x8189002FBCA5D33933A29E3BF508C820
SHA-1: 0xB4B435CEB88825D610CA25D5E1D02FE95C76F3AA
Backdoor.Trojan [Symantec]
Mal/Nitol-C [Sophos]
2 %Temp%\11a7bc
22,528 bytes MD5: 0x45557CB0D3F6D597790D7A2CD42927A4
SHA-1: 0x5DEEC6029E2FBCACA1E96C4B5739BAE80D305346
Backdoor.Trojan [Symantec]
packed with UPX [Kaspersky Lab]


Memory Modifications

Process NameProcess FilenameMain Module Size
rebfec.exe%Windir%\rebfec.exe69,632 bytes
[filename of the sample #1][file and pathname of the sample #1]69,632 bytes

Module NameModule FilenameAddress Space Details
hra8.dll%System%\hra8.dllProcess name: rebfec.exe
Process filename: %Windir%\rebfec.exe
Address space: 0x380000 - 0x38D000

Service NameDisplay NameStatusService Filename
Bcdef Hijklmn PqrsBcdefghi Klmnopqrs Ua Cdefghijkl Nop"Running"%Windir%\rebfec.exe


Registry Modifications


Other details


1033TCPrebfec.exe (%Windir%\rebfec.exe)
1034TCPrebfec.exe (%Windir%\rebfec.exe)

Remote HostPort Number


Outbound traffic (potentially malicious)



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