Gen.Variant.Zusy.123960_78f0cf98f4

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:860

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

iexplore.exe:1488

Mutexes

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

File activity

The process %original file name%.exe:860 makes changes in the file system.

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

%Documents and Settings%\%current user%\My Documents\explorer.exe (2105 bytes)
%Documents and Settings%\%current user%\Start Menu\Programs\Startup\startup.exe (2105 bytes)

Registry activity

The process %original file name%.exe:860 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "2C B0 8A D5 17 33 11 E0 A2 30 0A 31 BE E7 8B 5D"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"
"Personal" = "%Documents and Settings%\%current user%\My Documents"
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"Startup" = "%Documents and Settings%\%current user%\Start Menu\Programs\Startup\startup.exe"

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):

   %original file name%.exe:860
   

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

   %Documents and Settings%\%current user%\My Documents\explorer.exe (2105 bytes)
   %Documents and Settings%\%current user%\Start Menu\Programs\Startup\startup.exe (2105 bytes)

4. Delete the following value(s) in the autorun key (How to Work with System Registry):

   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "Startup" = "%Documents and Settings%\%current user%\Start Menu\Programs\Startup\startup.exe"

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

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

Static Analysis

VersionInfo

Company Name: Microsoft
Product Name: Microsoft
Product Version: 9.1.3.23
Legal Copyright: @2015
Legal Trademarks: Microsoft (TM)
Original Filename: war.exe
Internal Name: war.exe
File Version: 9.1.3.23
File Description: Microsoft
Comments: Microsoft Coprotion
Language: English (United States)

Company Name: MicrosoftProduct Name: MicrosoftProduct Version: 9.1.3.23Legal Copyright: @2015Legal Trademarks: Microsoft (TM)Original Filename: war.exeInternal Name: war.exeFile Version: 9.1.3.23File Description: MicrosoftComments: Microsoft CoprotionLanguage: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	135284	135680	4.44812	6d9dd2e47798a19c2271edcbe08271cf
.sdata	147456	177	512	1.5075	17ee383034c2bf121a69e919594e429e
.rsrc	155648	4532	4608	3.33891	6c3fe415d32cac375f8f825ad50ee854
.reloc	163840	12	512	0.067931	b7fbb324efef06bef4c12cb55076fd1e

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_1488:

%?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_1488_rwx_10000000_00080000:

`.rsrc

`.rsrc

ServerKeyloggerU

ServerKeyloggerU