Trojan.Generic.20059091_8d8f3615dc – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

The Trojan creates the following process(es):

KESXUG~1.EXE:2100
KCJc.exe:1116
%original file name%.exe:2180

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

RegSvcs.exe:2908

Mutexes

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

File activity

The process KESXUG~1.EXE:2100 makes changes in the file system.

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

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\aut3948.tmp (5505 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\aut3AC0.tmp (2905 bytes)
C:\Users\"%CurrentUserName%"\AppData\Roaming\KCJc.exe (1874 bytes)
C:\Users\"%CurrentUserName%"\AppData\Roaming\WbQHK (299 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\WbQHK (3777 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\KCJc.exe (10129 bytes)

The Trojan deletes the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\aut3948.tmp (0 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\aut3AC0.tmp (0 bytes)

The process KCJc.exe:1116 makes changes in the file system.

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

C:\Users\"%CurrentUserName%"\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\aMFJZESeBUeP.lnk (838 bytes)

The process RegSvcs.exe:2908 makes changes in the file system.

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

C:\Users\"%CurrentUserName%"\AppData\Roaming\88DCD395-B062-45B3-A6CD-79F37C0EBA08\run.dat (8 bytes)

The process %original file name%.exe:2180 makes changes in the file system.

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

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\KESXUG~1.EXE (27294 bytes)

The Trojan deletes the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP (0 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\KESXUG~1.EXE (0 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\WbQHK (0 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\KCJc.exe (0 bytes)

Registry activity

The process %original file name%.exe:2180 makes changes in the system registry.

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

To automatically run itself each time Windows is booted, the Trojan adds the following link to its file to the system registry autorun key:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0" = "rundll32.exe C:\Windows\system32\advpack.dll,DelNodeRunDLL32 C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\"

The Trojan deletes the following value(s) in system registry:

The Trojan disables automatic startup of the application by deleting the following autorun value:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0"

Dropped PE files

MD5	File path
b06e67f9767e5023892d9698703ad098	c:\Users\"%CurrentUserName%"\LqF7ANStdFn6Yvfg\KCJc.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

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*

Terminate malicious process(es) (How to End a Process With the Task Manager):
KESXUG~1.EXE:2100
KCJc.exe:1116
%original file name%.exe:2180
Delete the original Trojan file.
Delete or disinfect the following files created/modified by the Trojan:
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\aut3948.tmp (5505 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\aut3AC0.tmp (2905 bytes)
C:\Users\"%CurrentUserName%"\AppData\Roaming\KCJc.exe (1874 bytes)
C:\Users\"%CurrentUserName%"\AppData\Roaming\WbQHK (299 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\WbQHK (3777 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\KCJc.exe (10129 bytes)
C:\Users\"%CurrentUserName%"\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\aMFJZESeBUeP.lnk (838 bytes)
C:\Users\"%CurrentUserName%"\AppData\Roaming\88DCD395-B062-45B3-A6CD-79F37C0EBA08\run.dat (8 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\KESXUG~1.EXE (27294 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce]
"wextract_cleanup0" = "rundll32.exe C:\Windows\system32\advpack.dll,DelNodeRunDLL32 C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\"
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: Microsoft Corporation
Product Name: Internet Explorer
Product Version: 11.00.9600.16384
Legal Copyright: (c) Microsoft Corporation. All rights reserved.
Legal Trademarks:
Original Filename: WEXTRACT.EXE .MUI
Internal Name: Wextract
File Version: 11.00.9600.16384 (winblue_rtm.130821-1623)
File Description: Win32 Cabinet Self-Extractor
Comments:
Language: English (United States)

Company Name: Microsoft CorporationProduct Name: Internet ExplorerProduct Version: 11.00.9600.16384Legal Copyright: (c) Microsoft Corporation. All rights reserved.Legal Trademarks: Original Filename: WEXTRACT.EXE .MUIInternal Name: Wextract File Version: 11.00.9600.16384 (winblue_rtm.130821-1623)File Description: Win32 Cabinet Self-Extractor Comments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	26980	27136	4.40175	22c7cbc7745692002dbdf65a4bc48e63
.data	32768	6796	1024	2.20139	317f8a934ee443eee01c2a315bde9ca1
.idata	40960	4220	4608	3.49841	a5d9b0c8d0d0e35bcbb5219dda1a3075
.rsrc	49152	1382751	1382912	5.49631	8c5dc7b727d87f8e4b3683a47a4e9604
.reloc	1433600	2240	2560	4.41763	7772c8e6ff71410862c324630aac5515

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
xzit007.ddns.net	197.211.56.21

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

KCJc.exe_1116:

.text

`.rdata

@.data

.rsrc

@.reloc

j.Yf;

r%f;M

j.Xf;

j.Zf;

PSSSSSSh

Gt.Ht$

l.AKv

kernel32.dll

?#%X.y

GetProcessWindowStation

operator

operand of unlimited repeat could match the empty string

POSIX named classes are supported only within a class

erroffset passed as NULL

POSIX collating elements are not supported

this version of PCRE is compiled without UTF support

PCRE does not support \L, \l, \N{name}, \U, or \u

support for \P, \p, and \X has not been compiled

this version of PCRE is not compiled with Unicode property support

\N is not supported in a class

RegDeleteKeyExW

advapi32.dll

Error text not found (please report)

WSOCK32.dll

VERSION.dll

WINMM.dll

COMCTL32.dll

MPR.dll

InternetCrackUrlW

HttpQueryInfoW

HttpOpenRequestW

HttpSendRequestW

FtpOpenFileW

FtpGetFileSize

InternetOpenUrlW

WININET.dll

PSAPI.DLL

IPHLPAPI.DLL

USERENV.dll

UxTheme.dll

GetProcessHeap

CreatePipe

GetWindowsDirectoryW

KERNEL32.dll

OpenWindowStationW

SetProcessWindowStation

CloseWindowStation

MapVirtualKeyW

EnumChildWindows

EnumWindows

VkKeyScanW

GetKeyState

GetKeyboardState

SetKeyboardState

GetAsyncKeyState

keybd_event

EnumThreadWindows

ExitWindowsEx

UnregisterHotKey

RegisterHotKey

GetKeyboardLayoutNameW

USER32.dll

SetViewportOrgEx

GDI32.dll

COMDLG32.dll

RegOpenKeyExW

RegCloseKey

RegCreateKeyExW

RegEnumKeyExW

RegDeleteKeyW

ADVAPI32.dll

ShellExecuteW

SHFileOperationW

ShellExecuteExW

SHELL32.dll

ole32.dll

OLEAUT32.dll

GetCPInfo

zcÃ

UQ.WP

mI.Us

\.gGL

.FFF

,.bh9

].Whjj*

? ?$?(?,?0?4?8?

2 2$2(2,2024282

4F4s4

4D4C4R4e4u4

2!2%2)2-2125292=2

01s1

2=22393@3[3

?&?-?4?:?

8Å¸94:

8!9*919

> >$>(>,>

? ?$?(?,?0?

/AutoIt3ExecuteScript

/AutoIt3ExecuteLine

CMDLINE

CMDLINERAW

FTPSETPROXY

GUICTRLRECVMSG

GUICTRLSENDMSG

GUIGETMSG

GUIREGISTERMSG

HOTKEYSET

HTTPSETPROXY

HTTPSETUSERAGENT

ISKEYWORD

MAPKEYS

MSGBOX

REGENUMKEY

SHELLEXECUTE

SHELLEXECUTEWAIT

TCPACCEPT

TCPCLOSESOCKET

TCPCONNECT

TCPLISTEN

TCPNAMETOIP

TCPRECV

TCPSEND

TCPSHUTDOWN

TCPSTARTUP

TRAYGETMSG

UDPBIND

UDPCLOSESOCKET

UDPOPEN

UDPRECV

UDPSEND

UDPSHUTDOWN

UDPSTARTUP

SendKeyDownDelay

SendKeyDelay

TCPTimeout

mscoree.dll

combase.dll

- floating point support not loaded

- CRT not initialized

- Attempt to initialize the CRT more than once.

USER32.DLL

789:;?

APPSKEY

WINDOWSDIR

AUTOITEXE

HOTKEYPRESSED

%s (%d) : ==> %s.:

Line %d:

Line %d (File "%s"):

%s (%d) : ==> %s:

AutoIt script files (*.au3, *.a3x)

*.au3;*.a3x

All files (*.*)

KEYS

Line %d:

\\?\UNC\

04090000

%u.%u.%u.%u

0.0.0.0

Mddddd

"%s" (%d) : ==> %s:

\??\%s

GUI_RUNDEFMSG

AUTOITCALLVARIABLE%d

255.255.255.255

Keyword

AUTOIT.ERROR

Null Object assignment in FOR..IN loop

Incorrect Object type in FOR..IN loop

3, 3, 14, 2

HKEY_LOCAL_MACHINE

HKEY_CLASSES_ROOT

HKEY_CURRENT_CONFIG

HKEY_CURRENT_USER

HKEY_USERS

%d/d/d

C:\Users\"%CurrentUserName%"\AppData\Roaming\KCJc.exe

hXXp://VVV.autoitscript.com/autoit3/

AutoIt3.exe

AutoIt supports the __stdcall (WINAPI) and __cdecl calling conventions. The __stdcall (WINAPI) convention is used by default but __cdecl can be used instead. See the DllCall() documentation for details on changing the calling convention.

Missing operator in expression."Unbalanced brackets in expression.

>"Select" statement is missing "EndSelect" or "Case" statement. "If" statements must have a "Then" keyword. Badly formated Struct statement."Cannot assign values to constants..Cannot make existing variables into constants.9Only Object-type variables allowed in a "With" statement.v"long_ptr", "int_ptr" and "short_ptr" DllCall() types have been deprecated. Use "long*", "int*" and "short*" instead.-Object referenced outside a "With" statement.)Nested "With" statements are not allowed."Variable must be of type "Object".1The requested action with this object has failed.8Variable appears more than once in function declaration.2ReDim array can not be initialized in this manner.1An array variable can not be used in this manner.

Invalid file filter given.*Expected a variable in user function call.1"Do" statement has no matching "Until" statement.2"Until" statement with no matching "Do" statement.#"For" statement is badly formatted.2"Next" statement with no matching "For" statement.N"ExitLoop/ContinueLoop" statements only valid from inside a For/Do/While loop.1"For" statement has no matching "Next" statement.@"Case" statement with no matching "Select"or "Switch" statement.:"EndSelect" statement with no matching "Select" statement.ORecursion level has been exceeded - AutoIt will quit to prevent stack overflow.&Cannot make existing variables static.4Cannot make static variables into regular variables.

3This keyword cannot be used after a "Then" keyword.

0Expected a "=" operator in assignment statement.*Invalid keyword at the start of this line.

Invalid element in a DllStruct.*Unknown option or bad parameter specified.&Unable to load the internet libraries./"Struct" statement has no matching "EndStruct".HUnable to open file, the maximum number of open files has been exceeded.K"ContinueLoop" statement with no matching "While", "Do" or "For" statement.0Incorrect number of parameters in function call.'"ReDim" used without an array variable.>Illegal text at the end of statement (one statement per line).1"If" statement has no matching "EndIf" statement.1"Else" statement with no matching "If" statement.2"EndIf" statement with no matching "If" statement.7Too many "Else" statements for matching "If" statement.3"While" statement has no matching "Wend" statement.4"Wend" statement with no matching "While" statement.%Variable used without being declared.XArray variable has incorrect number of subscripts or subscript dimension range exceeded.#Variable subscript badly formatted.*Subscript used on non-accessible variable.&Too many subscripts used for an array.0Missing subscript dimensions in "Dim" statement.NNo variable given for "Dim", "Local", "Global", "Struct" or "Const" statement.

HCan pass constants by reference only to parameters with "Const" keyword.*Can not initialize a variable with itself.$Incorrect way to use this parameter.:"EndSwitch" statement with no matching "Switch" statement.>"Switch" statement is missing "EndSwitch" or "Case" statement.H"ContinueCase" statement with no matching "Select"or "Switch" statement.

String missing closing quote.!Badly formated variable or macro.*Missing separator character after keyword.

RegSvcs.exe_2908:

.text

`.reloc

B.rsrc

/.ffefefeeffe

lSystem.Resources.ResourceReader, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089#System.Resources.RuntimeResourceSet

sÃžUK

v2.0.50727

NanoCore Client.exe

Microsoft.VisualBasic

System.Windows.Forms

System.Drawing

kernel32.dll

psapi.dll

advapi32.dll

ntdll.dll

dnsapi.dll

ClientLoaderForm.resources

Microsoft.VisualBasic.ApplicationServices

Microsoft.VisualBasic.CompilerServices

Operators

Microsoft.VisualBasic.Devices

Microsoft.Win32

RegistryKey

NanoCore.ClientPlugin

NanoCore.ClientPluginHost

System.CodeDom.Compiler

System.Collections.Generic

KeyValuePair`2

System.Collections

System.ComponentModel

System.Diagnostics

ProcessWindowStyle

InvalidOperationException

System.IO

System.IO.Compression

System.Net

System.Net.Sockets

SocketAsyncOperation

OperatingSystem

System.Reflection

System.Runtime.CompilerServices

System.Runtime.InteropServices

System.Security.AccessControl

System.Security.Cryptography

System.Security.Principal

WindowsBuiltInRole

WindowsIdentity

WindowsPrincipal

System.Text

System.Threading

FormWindowState

#=qmLTtz8OEDrkzFTzYkI_Dg1dvKwiGw9blNcZSU_QqMsg=

.cctor

.ctor

ClosePipe

PipeExists

#=qNn8WS2rooUJUoMsG84mQ7PkK4IQF8$E42cyDjfL7Kqc=

#=qwSqLSPEuM8lJy4sOeuH92YjPodcLquqdG$OodozwC60=

#=qiY1B9yU2oVkPHxhn$y67SFTP8x1Jb0botGqdUGkdpQg=

CreatePipe

PipeCreated

#=q85afbI_HcqBFOZnC0iAqsNghLb3LsuyjFtpLEYYoPX8=

#=q$fGRvwQxjFKeY$SH10p0pyPTU$R77VMKr3CcLFQeQ2Y=

#=q6wR5WMLGkL9afTpqmWsw9g==

SetThreadExecutionState

RegOpenKeyEx

RegCloseKey

ContainsKey

PipeClosed

get_Key

GetExecutingAssembly

set_Key

get_ExecutablePath

OpenSubKey

set_UseShellExecute

set_WindowStyle

GetPublicKeyToken

get_Port

get_LastOperation

set_WindowState

8.0.0.0

System.Windows.Forms.Form

My.MyProject.Forms

4System.Web.Services.Protocols.SoapHttpClientProtocol

$ded4b294-b39a-44d9-b2cd-4ddba7f7b877

1.2.2.0

_CorExeMain

mscoree.dll

Lz.wx

Ld.ls

%SPgR

S.tPJ

RegSvcs.exe_2908_rwx_00170000_00038000:

.text

`.reloc

B.rsrc

/.ffefefeeffe

lSystem.Resources.ResourceReader, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089#System.Resources.RuntimeResourceSet

sÃžUK

v2.0.50727

NanoCore Client.exe

Microsoft.VisualBasic

System.Windows.Forms

System.Drawing

kernel32.dll

psapi.dll

advapi32.dll

ntdll.dll

dnsapi.dll

ClientLoaderForm.resources

Microsoft.VisualBasic.ApplicationServices

Microsoft.VisualBasic.CompilerServices

Operators

Microsoft.VisualBasic.Devices

Microsoft.Win32

RegistryKey

NanoCore.ClientPlugin

NanoCore.ClientPluginHost

System.CodeDom.Compiler

System.Collections.Generic

KeyValuePair`2

System.Collections

System.ComponentModel

System.Diagnostics

ProcessWindowStyle

InvalidOperationException

System.IO

System.IO.Compression

System.Net

System.Net.Sockets

SocketAsyncOperation

OperatingSystem

System.Reflection

System.Runtime.CompilerServices

System.Runtime.InteropServices

System.Security.AccessControl

System.Security.Cryptography

System.Security.Principal

WindowsBuiltInRole

WindowsIdentity

WindowsPrincipal

System.Text

System.Threading

FormWindowState

#=qmLTtz8OEDrkzFTzYkI_Dg1dvKwiGw9blNcZSU_QqMsg=

.cctor

.ctor

ClosePipe

PipeExists

#=qNn8WS2rooUJUoMsG84mQ7PkK4IQF8$E42cyDjfL7Kqc=

#=qwSqLSPEuM8lJy4sOeuH92YjPodcLquqdG$OodozwC60=

#=qiY1B9yU2oVkPHxhn$y67SFTP8x1Jb0botGqdUGkdpQg=

CreatePipe

PipeCreated

#=q85afbI_HcqBFOZnC0iAqsNghLb3LsuyjFtpLEYYoPX8=

#=q$fGRvwQxjFKeY$SH10p0pyPTU$R77VMKr3CcLFQeQ2Y=

#=q6wR5WMLGkL9afTpqmWsw9g==

SetThreadExecutionState

RegOpenKeyEx

RegCloseKey

ContainsKey

PipeClosed

get_Key

GetExecutingAssembly

set_Key

get_ExecutablePath

OpenSubKey

set_UseShellExecute

set_WindowStyle

GetPublicKeyToken

get_Port

get_LastOperation

set_WindowState

8.0.0.0

System.Windows.Forms.Form

My.MyProject.Forms

4System.Web.Services.Protocols.SoapHttpClientProtocol

$ded4b294-b39a-44d9-b2cd-4ddba7f7b877

1.2.2.0

_CorExeMain

mscoree.dll

Lz.wx

Ld.ls

%SPgR

S.tPJ

SearchProtocolHost.exe_2712:

.text

`.data

.rsrc

@.reloc

ADVAPI32.dll

ntdll.DLL

KERNEL32.dll

msvcrt.dll

USER32.dll

ole32.dll

OLEAUT32.dll

TQUERY.DLL

MSSHooks.dll

IMM32.dll

SHLWAPI.dll

SrchCollatorCatalogInfo

SrchDSSLogin

SrchDSSPortManager

SrchPHHttp

SrchIndexerQuery

SrchIndexerProperties

SrchIndexerPlugin

SrchIndexerClient

SrchIndexerSchema

Msidle.dll

Failed to get REGKEY_FLTRDMN_MS_TO_IDLE, using default

pfps->psProperty.ulKind is LPWSTR but psProperty.lpwstr is NULL or empty

d:\win7sp1_gdr\enduser\mssearch2\common\utils\crchash.cxx

d:\win7sp1_gdr\enduser\mssearch2\search\search\gather\fltrdmn\fltrdaemon.cxx

d:\win7sp1_gdr\enduser\mssearch2\search\common\include\secutil.hxx

d:\win7sp1_gdr\enduser\mssearch2\common\tracer\tracerhelpers.h

d:\win7sp1_gdr\enduser\mssearch2\common\tracer\mutex.cpp

d:\win7sp1_gdr\enduser\mssearch2\common\include\srchxcpt.hxx

RegDeleteKeyW

RegDeleteKeyExW

8%uiP

Invalid parameter passed to C runtime function.

d:\win7sp1_gdr\enduser\mssearch2\common\tracer\tracersecutil.h

d:\win7sp1_gdr\enduser\mssearch2\common\tracer\tracmain.cpp

-d-d-d-d-d-d-d-%d

d:\win7sp1_gdr\enduser\mssearch2\common\tracer\tracmain.h

0xx=

%s(%d)

tid="0x%x"

pid="0x%x"

tagname="%s"

tagid="0x%x"

el="0x%x"

time="d/d/d d:d:d.d"

logname="%s"

d:\win7sp1_gdr\enduser\mssearch2\common\tracer\sysimprs.cxx

SHELL32.dll

PROPSYS.dll

ntdll.dll

RegCloseKey

RegCreateKeyExW

RegOpenKeyExW

RegQueryInfoKeyW

RegEnumKeyExW

ReportEventW

_amsg_exit

MsgWaitForMultipleObjects

SearchProtocolHost.pdb

2 2(20282|2

4%5S5

Software\Microsoft\Windows Search

https

kernel32.dll

msTracer.dll

msfte.dll

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps