Gen.Variant.Kazy.399904_3ee8b5d294 – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

ekboy.exe:3144
ekboy.exe:136
%original file name%.exe:3248

The Trojan injects its code into the following process(es):

Explorer.EXE:1948

Mutexes

The following mutexes were created/opened:No objects were found.

File activity

The process %original file name%.exe:3248 makes changes in the file system.

The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Gouk\ekboy.exe (319 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmpf5f6017a.bat (177 bytes)

Registry activity

The process ekboy.exe:3144 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "CE 04 28 C4 25 A3 8C 40 AB 70 00 9A C0 EA 6A F9"

The process ekboy.exe:136 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "93 A2 1D 87 1A 57 46 81 C9 90 72 E0 15 73 91 87"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

The process %original file name%.exe:3248 makes changes in the system registry.

The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F3 63 60 6A C4 EE FB 9C 38 D2 BF 60 16 9A A8 7D"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

Dropped PE files

MD5	File path
46f52e2f533cc869cfa8454a0008e637	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Gouk\ekboy.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

The Trojan installs the following user-mode hooks in WININET.dll:

HttpSendRequestExW
HttpSendRequestExA
InternetReadFileExA
HttpSendRequestA
HttpSendRequestW
InternetQueryDataAvailable
InternetCloseHandle
HttpQueryInfoA
InternetReadFile

The Trojan installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan installs the following user-mode hooks in USER32.dll:

SetCursorPos
DefMDIChildProcA
DefFrameProcA
DefDlgProcA
GetClipboardData
DefMDIChildProcW
DefFrameProcW
GetUpdateRgn
RegisterClassA
GetDCEx
ReleaseCapture
SetCapture
DefWindowProcA
CallWindowProcA
GetUpdateRect
PeekMessageA
CallWindowProcW
GetMessagePos
GetCursorPos
EndPaint
BeginPaint
DefWindowProcW
RegisterClassExA
GetMessageA
DefDlgProcW
SwitchDesktop
OpenInputDesktop
RegisterClassExW
RegisterClassW
GetCapture
PeekMessageW
GetMessageW
GetWindowDC
TranslateMessage
GetDC
ReleaseDC

The Trojan installs the following user-mode hooks in WS2_32.dll:

WSASend
send
closesocket

The Trojan installs the following user-mode hooks in kernel32.dll:

GetFileAttributesExW

The Trojan installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtCreateThread

Propagation

Removals

Remove it with Ad-Aware

Click (here) to download and install Ad-Aware Free Antivirus.
Update the definition files.
Run a full scan of your computer.

Manual removal*

Scan a system with an anti-rootkit tool.
Terminate malicious process(es) (How to End a Process With the Task Manager):
ekboy.exe:3144
ekboy.exe:136
%original file name%.exe:3248
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
%Documents and Settings%\%current user%\Application Data\Gouk\ekboy.exe (319 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmpf5f6017a.bat (177 bytes)
Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.

Static Analysis

VersionInfo

Company Name: Igor Pavlov
Product Name: 7-Zip
Product Version: 9.20.0.0
Legal Copyright: Copyright (c) 1999-2010 Igor Pavlov
Legal Trademarks:
Original Filename: 7zg.exe
Internal Name: 7zg
File Version: 9.20.0.0
File Description: 7-Zip GUI
Comments:
Language: English (United States)

Company Name: Igor PavlovProduct Name: 7-ZipProduct Version: 9.20.0.0Legal Copyright: Copyright (c) 1999-2010 Igor PavlovLegal Trademarks: Original Filename: 7zg.exeInternal Name: 7zgFile Version: 9.20.0.0File Description: 7-Zip GUIComments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	16777216	10119	10240	4.47272	6ca0087d84fb78cb01a209662814b5ee
.rdata	33554432	1888	2048	3.56162	2a1e77e933f60c0c9961dee5514d393b
.data	50331648	2636	3072	4.71773	b5c89bf00c094abf30fbb8e66cbb3a74
.rsrc	67108864	295004	295424	4.2098	a4f7e399bff4dd9b9d464d5f46616fc6

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://megark.com/yeni/http/config.bin	159.253.36.212

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /yeni/http/config.bin HTTP/1.1

Accept: */*

Connection: Close

User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C; .NET4.0E)

Host: megark.com

Cache-Control: no-cache

HTTP/1.1 200 OK

Date: Mon, 11 Aug 2014 12:25:59 GMT

Server: LiteSpeed

Accept-Ranges: bytes

Connection: close

Last-Modified: Wed, 23 Jul 2014 22:33:26 GMT

Content-Type: application/octet-stream

Content-Length: 34414

Vary: User-Agent

<<< skipped >>>

Map

The Trojan connects to the servers at the folowing location(s):

Strings from Dumps

Explorer.EXE_1948_rwx_01100000_00027000:

.text

`.data

.reloc

hXXp://VVV.google.com/webhp

PR_OpenTCPSocket

gdiplus.dll

GdiplusShutdown

ole32.dll

gdi32.dll

: ;2*8.>

3.#70!2)

x#m`a`cmddt-

6 !26!1'1

7"52),,>

;

71.(5;4=

(203,2$0

/?./,5

:>(

8%/

%/>!

HTTP/1.1

userenv.dll

del "%s"

if exist "%s" goto d

del /F "%s"

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1)

urlmon.dll

cabinet.dll

hXXp://

hXXps://

HTTP/1.

SSSh,4

GetProcessHeap

KERNEL32.dll

SetKeyboardState

ExitWindowsEx

MsgWaitForMultipleObjects

MapVirtualKeyW

GetKeyboardState

OpenWindowStationW

GetProcessWindowStation

CreateWindowStationW

CloseWindowStation

SetProcessWindowStation

USER32.dll

RegOpenKeyExW

RegEnumKeyExW

RegCloseKey

RegCreateKeyExW

ADVAPI32.dll

PathIsURLW

UrlUnescapeA

SHDeleteKeyW

SHLWAPI.dll

ShellExecuteW

SHELL32.dll

Secur32.dll

SetViewportOrgEx

GDI32.dll

WS2_32.dll

PFXImportCertStore

CertDeleteCertificateFromStore

CertOpenSystemStoreW

CertCloseStore

CertEnumCertificatesInStore

CertDuplicateCertificateContext

PFXExportCertStoreEx

CRYPT32.dll

HttpSendRequestExA

HttpQueryInfoA

HttpSendRequestExW

HttpSendRequestW

HttpSendRequestA

InternetCrackUrlA

HttpOpenRequestA

HttpAddRequestHeadersA

GetUrlCacheEntryInfoW

HttpAddRequestHeadersW

WININET.dll

OLEAUT32.dll

NETAPI32.dll

6 6&6/656{6

cGlobal\XXX

nspr4.dll

nss3.dll

SysShadow

kernel32.dll

"%s" %s

/c "%s"

%sx.%s

%sx

%Documents and Settings%\%current user%\Application Data\Obiw\wubiw.osh

%Documents and Settings%\%current user%\Application Data\Obiw

wubiw.osh

Global\{89CFF0C4-84D8-809D-A99C-BAE73E99E287}

%Documents and Settings%\%current user%\Application Data

{1FB442E1-36FD-16E6-A99C-BAE73E99E287}

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps