Submission Summary:

What's been foundSeverity Level
Produces outbound traffic.
Downloads/requests other files from Internet.
Contains characteristics of an identified security risk.

 

Technical Details:

 

Possible Security Risk

Threat CategoryDescription
A code with the rootkit-specific techniques designed to hide the software presence in the 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
%ProgramFiles%\Messenger\lpk.dll
%System%\hra33.dll
29,184 bytes MD5: 0x8E41207EF3974EFCB4B36A88A28549B0
SHA-1: 0xB5BC6DAB177DAA7EB4975E217A0C49C1CC6A7F06
Rootkit.Win32.Lapka.an [Kaspersky Lab]
Trojan.Win32.Patcher [Ikarus]
2 [file and pathname of the sample #1]
%Windir%\yygeym.exe
20,480 bytes MD5: 0x5C414473493A3C58C0AD40BC4305B4CB
SHA-1: 0x70111A379BBE2F36E9714CD9101E8AD3A5413652
Mal/Behav-004 [Sophos]
Backdoor.Win32.Inject [Ikarus]
packed with UPX [Kaspersky Lab]

 

Memory Modifications

Process NameProcess FilenameMain Module Size
yygeym.exe%Windir%\yygeym.exe65,536 bytes
[filename of the sample #1][file and pathname of the sample #1]65,536 bytes

Module NameModule FilenameAddress Space Details
hra33.dll%System%\hra33.dllProcess name: yygeym.exe
Process filename: %Windir%\yygeym.exe
Address space: 0x3A0000 - 0x3AB000

Service NameDisplay NameStatusService Filename
Ijklmn Pqrstuvw YabIjklmn Pqrstuvw Yabcdefg Ijkl"Running"%Windir%\yygeym.exe

 

Registry Modifications

 

Other details

China

PortProtocolProcess
1033TCPyygeym.exe (%Windir%\yygeym.exe)
1035TCPyygeym.exe (%Windir%\yygeym.exe)

Remote HostPort Number
lc.di8518.us2017
180.255.23.116384
ddos.945e.com1975

Server NameServer PortConnect as UserConnection Password
127.0.0.280127.0.0.2127.0.0.2
127.0.0.380127.0.0.3127.0.0.3
127.0.0.480127.0.0.4127.0.0.4

 

Outbound traffic (potentially malicious)

 

 

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