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
53,248 bytes MD5: 0x311387C9D67794F179FF2383FA308E96
SHA-1: 0x474A9B6577EE2F984E088F61C291DC3FC38DD12D
Rootkit.Win32.Lapka.an [Kaspersky Lab]
DDoS:Win32/Nitol.A [Microsoft]
Trojan.Win32.Patcher [Ikarus]
2 [file and pathname of the sample #1]
%Windir%\yygeym.exe
44,544 bytes MD5: 0x3A0C1914376D969838171E432B1D94AC
SHA-1: 0xEACE0ACA82E9BEA3C034FB55CE2C1BECCAFC47AD
Mal/Behav-116 [Sophos]
DDoS:Win32/Nitol.A [Microsoft]
Backdoor.Win32.Inject [Ikarus]

 

Memory Modifications

Process NameProcess FilenameMain Module Size
yygeym.exe%Windir%\yygeym.exe53,248 bytes
[filename of the sample #1][file and pathname of the sample #1]53,248 bytes

Module NameModule FilenameAddress Space Details
hra33.dll%System%\hra33.dllProcess name: yygeym.exe
Process filename: %Windir%\yygeym.exe
Address space: 0x880000 - 0x890000

Service NameDisplay NameStatusService Filename
Vwxyab Defghijk MnoVwxyab Defghijk Mnopqrst Vwxy"Running"%Windir%\yygeym.exe

 

Registry Modifications

 

Other details

China

PortProtocolProcess
1033TCPyygeym.exe (%Windir%\yygeym.exe)
1034TCPyygeym.exe (%Windir%\yygeym.exe)

Remote HostPort Number
base8.gyddos.com8889

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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