Trojan.GenericKD.3234546_03a84763c5

Dynamic Analysis

Payload

Behaviour	Description
WormAutorun	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.

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.

Removals

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.

Static Analysis

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

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

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	26060	26112	4.42567	e9bf1a1e456a9a811b1b86e6602e3636
.data	32768	6796	1024	2.20139	317f8a934ee443eee01c2a315bde9ca1
.idata	40960	4216	4608	3.49941	d8675ba112ef922c6057a02546757a1a
.rsrc	49152	2678711	2678784	5.54181	2395c81384f4408eaf67297c0f9a598e
.reloc	2727936	5038	5120	2.58043	83de2f9b2c95be6fea06bced7e8a058e

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

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

Map

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

Strings from Dumps

iexplore.exe_2880:

.text

.text

`.data

`.data

.rsrc

.rsrc

@.reloc

@.reloc

v9.uj

v9.uj

>.uzf

>.uzf

.us;}

.us;}

IEFRAME.dll

IEFRAME.dll

MLANG.dll

MLANG.dll

iertutil.dll

iertutil.dll

urlmon.dll

urlmon.dll

ole32.dll

ole32.dll

SHELL32.dll

SHELL32.dll

SHLWAPI.dll

SHLWAPI.dll

msvcrt.dll

msvcrt.dll

USER32.dll

USER32.dll

KERNEL32.dll

KERNEL32.dll

ADVAPI32.dll

ADVAPI32.dll

RegOpenKeyExW

RegOpenKeyExW

RegCloseKey

RegCloseKey

GetWindowsDirectoryW

GetWindowsDirectoryW

_amsg_exit

_amsg_exit

_wcmdln

_wcmdln

UrlApplySchemeW

UrlApplySchemeW

PathIsURLW

PathIsURLW

UrlCanonicalizeW

UrlCanonicalizeW

UrlCreateFromPathW

UrlCreateFromPathW

iexplore.pdb

iexplore.pdb

KEYW

KEYW

KEYWh

KEYWh

KEYWD

KEYWD

.ENNNG.

.ENNNG.

a.ry.v

a.ry.v

l.igM4

l.igM4

?1%SGf

?1%SGf

xh.JW^

xh.JW^

.97777"7" " " !

.97777"7" " " !

3.... ))

3.... ))

8888888888888

8888888888888

8888888888

8888888888

.lPV)

.lPV)

úW1

úW1

.ApX/

.ApX/

H.ZAf

H.ZAf

ð[U

ð[U

%s!FK

%s!FK

1YYYY1YY9GEAA=77YRNNNW:.VT1

1YYYY1YY9GEAA=77YRNNNW:.VT1

888777777

888777777

Y.hilkRROMLK=C,

Y.hilkRROMLK=C,

..(((($$

..(((($$

3...((((%

3...((((%

3....(.''$

3....(.''$

3.2...((((%

3.2...((((%

33.2....(,'

33.2....(,'

55323222...

55323222...

(%&'00443445?

(%&'00443445?

00.,,,4(

00.,,,4(

000.,,9(

000.,,9(

0020..9(

0020..9(

003200;(

003200;(

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

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

Microsoft.InternetExplorer.Default

Microsoft.InternetExplorer.Default

user32.dll

user32.dll

Kernel32.DLL

Kernel32.DLL

xfire.exe

xfire.exe

wlmail.exe

wlmail.exe

winamp.exe

winamp.exe

waol.exe

waol.exe

sidebar.exe

sidebar.exe

psocdesigner.exe

psocdesigner.exe

np.exe

np.exe

netscape.exe

netscape.exe

netcaptor.exe

netcaptor.exe

neoplanet.exe

neoplanet.exe

msn.exe

msn.exe

mshtmpad.exe

mshtmpad.exe

mshta.exe

mshta.exe

loader42.exe

loader42.exe

infopath.exe

infopath.exe

iexplore.exe

iexplore.exe

iepreview.exe

iepreview.exe

groove.exe

groove.exe

explorer.exe

explorer.exe

dreamweaver.exe

dreamweaver.exe

contribute.exe

contribute.exe

aol.exe

aol.exe

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

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

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

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

DShell32.dll

DShell32.dll

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

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

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

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

"%s" %s

"%s" %s

Kernel32.dll

Kernel32.dll

\AppPatch\sysmain.sdb

\AppPatch\sysmain.sdb

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

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

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

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

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

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

kernel32.dll

kernel32.dll

{00000000-0000-0000-0000-000000000000}

{00000000-0000-0000-0000-000000000000}

\\?\Volume

\\?\Volume

shell:%s

shell:%s

Imaging_CreateWebPagePreview_Perftrack

Imaging_CreateWebPagePreview_Perftrack

Browseui_Tabs_Tearoff_BetweenWindows

Browseui_Tabs_Tearoff_BetweenWindows

Frame_URLEntered

Frame_URLEntered

Imaging_CreateWebPagePreview

Imaging_CreateWebPagePreview

WS_ExecuteQuery

WS_ExecuteQuery

Shdocvw_BaseBrowser_FireEvent_WindowStateChanged

Shdocvw_BaseBrowser_FireEvent_WindowStateChanged

IdleTask_Execution_Time

IdleTask_Execution_Time

9.00.8112.16421 (WIN7_IE9_RTM.110308-0330)

9.00.8112.16421 (WIN7_IE9_RTM.110308-0330)

IEXPLORE.EXE

IEXPLORE.EXE

Windows

Windows

9.00.8112.16421

9.00.8112.16421

iexplore.exe_2880_rwx_10000000_0004A000:

.idata

.idata

.rdata

.rdata

P.reloc

P.reloc

P.rsrc

P.rsrc

ServerKeyloggerU

ServerKeyloggerU