Gen.Variant.Barys.54096_fa650ce84a

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):

%original file name%.exe:472
%original file name%.exe:1564
fa650ce84aa339efdf4e2b56be4150e2Srv.exe:412

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

iexplore.exe:252
iexplore.exe:1296

Mutexes

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

File activity

The process %original file name%.exe:472 makes changes in the file system.

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

C:\fa650ce84aa339efdf4e2b56be4150e2Srv.exe (56 bytes)

The Trojan deletes the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\x.html (0 bytes)

The process fa650ce84aa339efdf4e2b56be4150e2Srv.exe:412 makes changes in the file system.

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

%Program Files%\Microsoft\DesktopLayer.exe (56 bytes)

The Trojan deletes the following file(s):

%Program Files%\Microsoft\px1.tmp (0 bytes)

Registry activity

The process %original file name%.exe:472 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "99 BC 51 19 9D 1A 19 16 1D E1 AB A5 F0 3E BA A6"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{b98117e8-75ca-11e2-81b2-000c293708fb}]
"BaseClass" = "Drive"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\XtremeRAT]
"Mutex" = "8c7ePBCyH5m"

The process %original file name%.exe:1564 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "9B 87 AB 1B EE DA 47 1D 92 8D 38 D0 4C 6B C0 6B"

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

Dropped PE files

MD5	File path
7e4501deb46e6607fa6de10942ec0d32	c:\fa650ce84aa339efdf4e2b56be4150e2Srv.exe

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):

   %original file name%.exe:472
   %original file name%.exe:1564
   fa650ce84aa339efdf4e2b56be4150e2Srv.exe:412
   

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

   C:\fa650ce84aa339efdf4e2b56be4150e2Srv.exe (56 bytes)
   %Program Files%\Microsoft\DesktopLayer.exe (56 bytes)

4. Find and delete all copies of the worm's file together with "autorun.inf" scripts on removable drives.
   
5. Reboot the computer.
   

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

Static Analysis

VersionInfo

Company Name: aEQYy7TB54DQT
Product Name: a5B7gcO6ZO8FMYY1
Product Version: 11.14.18.73
Legal Copyright: Copyright (c) 2011
Legal Trademarks: a1VgvLpKuUXUR7KGoC
Original Filename: ff.exe
Internal Name: ff.exe
File Version: 11.14.18.73
File Description: a71NRShqdIW
Comments:
Language: English (United States)

Company Name: aEQYy7TB54DQTProduct Name: a5B7gcO6ZO8FMYY1Product Version: 11.14.18.73Legal Copyright: Copyright (c) 2011Legal Trademarks: a1VgvLpKuUXUR7KGoCOriginal Filename: ff.exeInternal Name: ff.exeFile Version: 11.14.18.73File Description: a71NRShqdIWComments: Language: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	244148	244224	4.98903	cd1d11846c1692618fcbef5b83b1a928
.rsrc	253952	2048	2048	2.42268	aee8837d00e0d0cec79f8b3beb2c9c2c
.reloc	262144	12	512	0.070639	6e70f91eee3779cf3266838ba4cfe6dc

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

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_252:

%?9-*09,*19}*09

%?9-*09,*19}*09

.text

.text

`.data

`.data

.rsrc

.rsrc

msvcrt.dll

msvcrt.dll

KERNEL32.dll

KERNEL32.dll

NTDLL.DLL

NTDLL.DLL

USER32.dll

USER32.dll

SHLWAPI.dll

SHLWAPI.dll

SHDOCVW.dll

SHDOCVW.dll

Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess

Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess

IE-X-X

IE-X-X

rsabase.dll

rsabase.dll

System\CurrentControlSet\Control\Windows

System\CurrentControlSet\Control\Windows

dw15 -x -s %u

dw15 -x -s %u

watson.microsoft.com

watson.microsoft.com

IEWatsonURL

IEWatsonURL

%s -h %u

%s -h %u

iedw.exe

iedw.exe

Iexplore.XPExceptionFilter

Iexplore.XPExceptionFilter

jscript.DLL

jscript.DLL

mshtml.dll

mshtml.dll

mlang.dll

mlang.dll

urlmon.dll

urlmon.dll

wininet.dll

wininet.dll

shdocvw.DLL

shdocvw.DLL

browseui.DLL

browseui.DLL

comctl32.DLL

comctl32.DLL

IEXPLORE.EXE

IEXPLORE.EXE

iexplore.pdb

iexplore.pdb

ADVAPI32.dll

ADVAPI32.dll

MsgWaitForMultipleObjects

MsgWaitForMultipleObjects

IExplorer.EXE

IExplorer.EXE

IIIIIB(II<.fg>

IIIIIB(II<.fg>

7?_____ZZSSH%

7?_____ZZSSH%

)z.UUUUUUUU

)z.UUUUUUUU

,....Qym

,....Qym

````2```

````2```

{.QLQIIIKGKGKGKGKGKG

{.QLQIIIKGKGKGKGKGKG

;33;33;0

;33;33;0

8888880

8888880

8887080

8887080

browseui.dll

browseui.dll

shdocvw.dll

shdocvw.dll

6.00.2900.5512 (xpsp.080413-2105)

6.00.2900.5512 (xpsp.080413-2105)

Windows

Windows

Operating System

Operating System

6.00.2900.5512

6.00.2900.5512

iexplore.exe_252_rwx_10000000_0005C000:

`.rsrc

`.rsrc

.rmnet

.rmnet

ServerKeyloggerU

ServerKeyloggerU