MD5: 03a84763c53d644637a2fe2d6719e7ad
SHA1: d99fcb3dc7f6ce29c64c04494e9fe8cbb8153ec3
SHA256: 10bd0f3af9083c28b564dcf0f25942de6f91c2c3e8fe90450ecbaf50887655a8
SSDeep: 49152:tQNb1kFe3 bC4yEAWWaxjNz2IBWclw31sQ8B8EsD TIGAzGpF8He15JGo5T8Rtx:ixkW ryEAQLz2AWcl8rylAg8iUeOt
Size: 2716672 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-10-14 08:50:27
Analyzed on: Windows7 SP1 32-bit

Summary:

Trojan. A program that appears to do one thing but actually does another (a.k.a. Trojan Horse).

Payload

Process activity

The Trojan creates the following process(es):

SERVIDOR.exe:704
SERVIDOR.exe:1072
%original file name%.exe:3340

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

iexplore.exe:2880

Mutexes

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

File activity

The process SERVIDOR.exe:704 makes changes in the file system.
The Trojan deletes the following file(s):

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\x.html (0 bytes)

The process %original file name%.exe:3340 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\SERVIDOR.exe (18931 bytes)
C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\BOLSTU~1.EXE (33547 bytes)

The Trojan deletes the following file(s):

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

Registry activity

The process SERVIDOR.exe:704 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKCU\Software\XtremeRAT]
"Mutex" = "BZPfLuWh4iq9zCt"

The process SERVIDOR.exe:1072 makes changes in the system registry.
The Trojan deletes the following registry key(s):

[HKCU\Software\Microsoft\MediaPlayer\Health\{4083F9F3-F661-45DD-8C83-07DC0AB0F2F5}]

The process %original file name%.exe:3340 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

There are no dropped PE files.

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

A worm can spread via removable drives. It writes its executable and creates "autorun.inf" scripts on all removable drives. The autorun script will execute the Trojan's file once a user opens a drive's folder in Windows Explorer.

VersionInfo

Company Name: Microsoft Corporation
Product Name: Internet Explorer
Product Version: 11.00.9600.16428
Legal Copyright: (c) Microsoft Corporation. All rights reserved.
Legal Trademarks:
Original Filename: WEXTRACT.EXE .MUI
Internal Name: Wextract
File Version: 11.00.9600.16428 (winblue_gdr.131013-1700)
File Description: Win32 Cabinet Self-Extractor
Comments:
Language: Language Neutral

PE Sections

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL	IP
jsouzamat.no-ip.org	191.189.13.155
dns.msftncsi.com	131.107.255.255

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

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

.text

`.data

.rsrc

@.reloc

v9.uj

>.uzf

.us;}

IEFRAME.dll

MLANG.dll

iertutil.dll

urlmon.dll

ole32.dll

SHELL32.dll

SHLWAPI.dll

msvcrt.dll

USER32.dll

KERNEL32.dll

ADVAPI32.dll

RegOpenKeyExW

RegCloseKey

GetWindowsDirectoryW

_amsg_exit

_wcmdln

UrlApplySchemeW

PathIsURLW

UrlCanonicalizeW

UrlCreateFromPathW

iexplore.pdb

KEYW

KEYWh

KEYWD

.ENNNG.

a.ry.v

l.igM4

?1%SGf

xh.JW^

.97777"7" " " !

3.... )) 

8888888888888

8888888888

.lPV)

úW1

.ApX/

H.ZAf

ð[U

%s!FK

1YYYY1YY9GEAA=77YRNNNW:.VT1

888777777

Y.hilkRROMLK=C,

..(((($$

3...((((%

3....(.''$

3.2...((((%

33.2....(,'

55323222...

(%&'00443445?

00.,,,4(

000.,,9(

0020..9(

003200;(

(#'( (''''!'!

Microsoft.InternetExplorer.Default

user32.dll

Kernel32.DLL

xfire.exe

wlmail.exe

winamp.exe

waol.exe

sidebar.exe

psocdesigner.exe

np.exe

netscape.exe

netcaptor.exe

neoplanet.exe

msn.exe

mshtmpad.exe

mshta.exe

loader42.exe

infopath.exe

iexplore.exe

iepreview.exe

groove.exe

explorer.exe

dreamweaver.exe

contribute.exe

aol.exe

{28fb17e0-d393-439d-9a21-9474a070473a}

Software\Policies\Microsoft\Windows\CurrentVersion\Internet Settings

DShell32.dll

Software\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\iexplore.exe

Software\Microsoft\Active Setup\Installed Components\>{26923b43-4d38-484f-9b9e-de460746276c}

"%s" %s

Kernel32.dll

\AppPatch\sysmain.sdb

-extoff go.microsoft.com/fwlink/?LinkId=106323

-extoff go.microsoft.com/fwlink/?LinkId=106322

-extoff go.microsoft.com/fwlink/?LinkId=106320

kernel32.dll

{00000000-0000-0000-0000-000000000000}

\\?\Volume

shell:%s

Imaging_CreateWebPagePreview_Perftrack

Browseui_Tabs_Tearoff_BetweenWindows

Frame_URLEntered

Imaging_CreateWebPagePreview

WS_ExecuteQuery

Shdocvw_BaseBrowser_FireEvent_WindowStateChanged

IdleTask_Execution_Time

9.00.8112.16421 (WIN7_IE9_RTM.110308-0330)

IEXPLORE.EXE

Windows

9.00.8112.16421

iexplore.exe_2880_rwx_10000000_0004A000:

.idata

.rdata

P.reloc

P.rsrc

ServerKeyloggerU

789:;<&'()* ,-./12345

%SERVER%

URLMON.DLL

shell32.dll

hXXp://

advapi32.dll

kernel32.dll

mpr.dll

version.dll

comctl32.dll

gdi32.dll

opengl32.dll

user32.dll

wintrust.dll

msimg32.dll

v9.ujb

GetKeyboardType

RegOpenKeyExA

RegCloseKey

oleaut32.dll

RegOpenKeyExW

RegCreateKeyW

GetWindowsDirectoryW

UnhookWindowsHookEx

SetWindowsHookExW

MapVirtualKeyW

GetKeyboardLayout

GetKeyState

shlwapi.dll

SHDeleteKeyW

FindExecutableW

URLDownloadToCacheFileW

wininet.dll

FtpPutFileW

FtpSetCurrentDirectoryW

GetKeyboardState

ShellExecuteW

ntdll.dll

1 1$1(1,10141

KWindows

TServerKeylogger

x.html

HKEY_CLASSES_ROOT

HKEY_CURRENT_USER

HKEY_LOCAL_MACHINE

HKEY_USERS

HKEY_CURRENT_CONFIG

[Execute]

KeyDelBackspace

<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">

.html

XtremeKeylogger

Software\Microsoft\Windows\CurrentVersion\Run

.functions

icon=shell32.dll,4

shellexecute=

autorun.inf

\Microsoft\Windows\

ÞFAULTBROWSER%

svchost.exe

jsouzamat.no-ip.org

st.exe

Cli{OJKRE6B4-G47Y-KCO1-0348-VH43GNOLM86T}

HKCU\Software\Microsoft\Windows\CurrentVersion\Run

l%SERVER%

Subir cert no svg 1202

C:\Windows\system32\propsys

PTF.ftpserver.com

ftpuser

C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\SERVIDOR.exe

%Program Files%\Internet Explorer\iexplore.exe

svchost.exe_2840:

.text

`.data

.rsrc

@.reloc

msvcrt.dll

API-MS-Win-Core-ProcessThreads-L1-1-0.dll

KERNEL32.dll

NTDLL.DLL

API-MS-Win-Security-Base-L1-1-0.dll

API-MS-WIN-Service-Core-L1-1-0.dll

API-MS-WIN-Service-winsvc-L1-1-0.dll

RPCRT4.dll

ole32.dll

ntdll.dll

_amsg_exit

RegCloseKey

RegOpenKeyExW

GetProcessHeap

svchost.pdb

version="5.1.0.0"

name="Microsoft.Windows.Services.SvcHost"

<description>Host Process for Windows Services</description>

<requestedExecutionLevel

Software\Microsoft\Windows NT\CurrentVersion\Svchost

Software\Microsoft\Windows NT\CurrentVersion\MgdSvchost

\PIPE\

Host Process for Windows Services

6.1.7600.16385 (win7_rtm.090713-1255)

svchost.exe

Windows

Operating System

6.1.7600.16385

Remove it with Ad-Aware

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

Manual removal*

1. Terminate malicious process(es) (How to End a Process With the Task Manager):
   

   SERVIDOR.exe:704
   SERVIDOR.exe:1072
   %original file name%.exe:3340
   

2. Delete the original Trojan file.
   
3. Delete or disinfect the following files created/modified by the Trojan:
   

   C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\SERVIDOR.exe (18931 bytes)
   C:\Users\"%CurrentUserName%"\AppData\Local\Temp\IXP000.TMP\BOLSTU~1.EXE (33547 bytes)

4. 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\"

5. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
   
6. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
   
7. Reboot the computer.
   

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