ThreatExpert Report: Win32.AdWare, Trojan.Win32.BHO, Trojan.ADH.2

Submission Summary:

Submission details:

Submission received: 22 October 2012, 13:09:50
Processing time: 12 min 3 sec
Submitted sample:

File MD5: 0x2133DB1AD476021FAF9C75BE24BA1468
File SHA-1: 0x05614C2BDC6EE3F0716E4703975FF0F39561905F
Filesize: 519,007 bytes
Alias: Win32.AdWare [Ikarus]

Summary of the findings:

What's been found	Severity Level
Downloads/requests other files from Internet.
Creates a startup registry entry.
Registers a 32-bit in-process server DLL.
Registers a Browser Helper Object (Microsoft's Internet Explorer plugin module).
Contains characteristics of an identified security risk.

Technical Details:

Possible Security Risk

Attention! The following threat category was identified:

Threat Category	Description
	A malicious trojan horse or bot that may represent security risk for the compromised system and/or its network environment

File System Modifications

The following files were created in the system:

#	Filename(s)	File Size	File Hash	Alias
1	c:\DelUS.bat	124 bytes	MD5: 0x68ED47C0DCEB3CC6ACC2AB3BEDB4C74C SHA-1: 0x44CDDA23DD8EB2C78CF524056F1B5A08834E724A	(not available)
2	%ProgramFiles%\enumerate\gt\enumerate_gt.dll	212,992 bytes	MD5: 0xA6807FC9B4FC2938DCA43263BF907A46 SHA-1: 0xDDAFBD47140FF12F14646B38D1C3B481D1CAADDB	Trojan.Win32.BHO [Ikarus]
3	%ProgramFiles%\enumerate\gt\enumerate_gtu.exe	933,888 bytes	MD5: 0x5A54497921B6B22D3C612D5FB32F9918 SHA-1: 0x86AC8F3B0E1EDE3DEF22EEB94B83FE3F093F7A33	(not available)
4	%ProgramFiles%\enumerate\gt\enumst.exe	925,696 bytes	MD5: 0xD178213CFC98FB7909B061D9FDA2A276 SHA-1: 0x040A33B797BFAC5991C9C310EAD18A8E4EF7D87D	Win32.AdWare [Ikarus]
5	%ProgramFiles%\enumerate\gt\uninstall.exe	65,061 bytes	MD5: 0x298E563DBAE274D2B3F22F72A145F6BB SHA-1: 0x2DCC5D3C173D0769C28D94662FE43ACD29F1A54A	Trojan.ADH.2 [Symantec]
6	[file and pathname of the sample #1]	519,007 bytes	MD5: 0x2133DB1AD476021FAF9C75BE24BA1468 SHA-1: 0x05614C2BDC6EE3F0716E4703975FF0F39561905F	Win32.AdWare [Ikarus]

Note:

%ProgramFiles% is a variable that refers to the Program Files folder. A typical path is C:\Program Files.

The following directories were created:

%ProgramFiles%\enumerate
%ProgramFiles%\enumerate\gt

Memory Modifications

There were new processes created in the system:

Process Name	Process Filename	Main Module Size
[filename of the sample #1]	[file and pathname of the sample #1]	192,512 bytes
enumst.exe	%ProgramFiles%\enumerate\gt\enumst.exe	942,080 bytes
enumerate_gtu.exe	%ProgramFiles%\enumerate\gt\enumerate_gtu.exe	950,272 bytes

Registry Modifications

The following Registry Keys were created:

HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\enumerate_gt_goalplay.DLL
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{461A5DA8-9CE9-4D80-8203-BD4C43CA386B}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\InprocServer32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\ProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\Programmable
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\VersionIndependentProgID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}\ProxyStubClsid
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}\ProxyStubClsid32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}\TypeLib
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\0
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\0\win32
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\FLAGS
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\HELPDIR
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_go.1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_go.1\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_goal
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_goal\CLSID
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_goal\CurVer
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Enumerate_gt uninstall
HKEY_CURRENT_USER\Software\enumerate_gt
HKEY_CURRENT_USER\Software\enumerate_gt\Queue

The newly created Registry Values are:

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\enumerate_gt_goalplay.DLL]

AppID = "{461A5DA8-9CE9-4D80-8203-BD4C43CA386B}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{461A5DA8-9CE9-4D80-8203-BD4C43CA386B}]

(Default) = "enumerate_gt_goalplay"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\VersionIndependentProgID]

(Default) = "enumerate_gt_goalplay.enumerate_gt_goal"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\TypeLib]

(Default) = "{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\ProgID]

(Default) = "enumerate_gt_goalplay.enumerate_gt_go.1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}\InprocServer32]

(Default) = "%ProgramFiles%\enumerate\gt\enumerate_gt.dll"
ThreadingModel = "Apartment"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}]

(Default) = "Enumerate Top Search - GT"
AppID = "{461A5DA8-9CE9-4D80-8203-BD4C43CA386B}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}\TypeLib]

(Default) = "{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}"
Version = "1.0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}\ProxyStubClsid32]

(Default) = "{00020424-0000-0000-C000-000000000046}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}\ProxyStubClsid]

(Default) = "{00020424-0000-0000-C000-000000000046}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Interface\{0F82B3A0-9D88-47D8-B00C-DD42CED12FCE}]

(Default) = "Ienumerate_gt_goalplaySO"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\0\win32]

(Default) = "%ProgramFiles%\enumerate\gt\enumerate_gt.dll"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\HELPDIR]

(Default) = ""

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0\FLAGS]

(Default) = "0"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\TypeLib\{E4F7D586-B0B3-4C17-A3DB-DF782514D38A}\1.0]

(Default) = "enumerate_gt_goalplay 1.0 ???? ???????"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_go.1\CLSID]

(Default) = "{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_go.1]

(Default) = "enumerate_gt_goalplaySO Class"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_goal\CurVer]

(Default) = "enumerate_gt_goalplay.enumerate_gt_go.1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_goal\CLSID]

(Default) = "{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\enumerate_gt_goalplay.enumerate_gt_goal]

(Default) = "enumerate_gt_goalplaySO Class"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{A6DBA346-DB0B-4C41-A016-0B9D119DA78A}]

(Default) = "Enumerate Top Search - GT"
NoExplorer = 0x00000001

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Enumerate_gt uninstall]

DisplayName = "Enumerate Top Search - gt"
UninstallString = ""%ProgramFiles%\enumerate\gt\uninstall.exe""
DisplayIcon = ""%ProgramFiles%\enumerate\gt\uninstall.exe""

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run]

Enumerate_gt = ""%ProgramFiles%\enumerate\gt\enumerate_gtu.exe" Runcmd"
Enumerate_gtst = ""%ProgramFiles%\enumerate\gt\enumst.exe" Runcmd"

so that enumerate_gtu.exe runs every time Windows starts

so that enumst.exe runs every time Windows starts

[HKEY_CURRENT_USER\Software\enumerate_gt]

nid = "gt5"
enumstdvalue = "20121022"
onegtu = "20121022"
stvalue = "1"
checkvalue = "1"
AP_1 = "0"
AP_2 = "0"
AU_1 = "0"
AU_2 = "0"
oneday = "20121022"

Other details

Analysis of the file resources indicate the following possible country of origin:

Republic of Korea

To mark the presence in the system, the following Mutex objects were created:

enumst
enumerate_gtu

The following Internet Connection was established:

Server Name	Server Port	Connect as User	Connection Password
enumstate.co.kr	80	(null)	(null)

The following GET requests were made:

check/enumerate_gt5/update/gt.php
check/enumst/update/gt.php
cnt/index.php?pid=enumst&type=4
cnt/index.php?pid=enumerate_gt5&type=4
check/enumerate_gt5/check.php
check/enumstate.php
cnt/index.php?pid=enumerate_gt5&type=5

The data identified by the following URL was then requested from the remote web server:

http://www.enumstate.co.kr/cnt/index.php?pid=enumerate_gt5&type=6

All content ("Information") contained in this report is the copyrighted work of Threat Expert Ltd and its associated companies ("ThreatExpert") and may not be copied without the express permission of ThreatExpert.

The Information is provided on an "as is" basis. ThreatExpert disclaims all warranties, whether express or implied, to the maximum extent permitted by law, including the implied warranties that the Information is merchantable, of satisfactory quality, accurate, fit for a particular purpose or need, or non-infringing, unless such implied warranties are legally incapable of exclusion. Further, ThreatExpert does not warrant or make any representations regarding the use or the results of the use of the Information in terms of their correctness, accuracy, reliability, or otherwise.