Gen.Variant.MSIL.8_2c48d33551

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):

msconfig.exe:2036
msconfig.exe:980
%original file name%.exe:1652

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

svchost.exe:1932
iexplore.exe:1320

Mutexes

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

File activity

The process msconfig.exe:2036 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe (601 bytes)

The process msconfig.exe:980 makes changes in the file system.

The Trojan deletes the following file(s):

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

The process %original file name%.exe:1652 makes changes in the file system.

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

%Documents and Settings%\%current user%\Application Data\msconfig.exe (601 bytes)

Registry activity

The process msconfig.exe:2036 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F2 79 58 F9 E1 EB C0 05 B4 7B 02 D4 EB 53 D6 0B"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Program Files%\Internet Explorer]
"iexplore.exe" = "Internet Explorer"

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

"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:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

The process msconfig.exe:980 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "77 03 AB CF 57 E1 29 E6 78 7C 08 E6 2E 8B 26 5A"

[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" = "--((Mutex))--"

The process %original file name%.exe:1652 makes changes in the system registry.

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

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "C7 66 15 9D 0C 1F D7 27 21 FF 70 4D F4 DD EE FE"

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

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Documents" = "%Documents and Settings%\All Users\Documents"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Application Data]
"msconfig.exe" = "n7Z2Qsz"

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

[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"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Common Desktop" = "%Documents and Settings%\All Users\Desktop"

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

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

"Personal" = "%Documents and Settings%\%current user%\My Documents"

The Trojan modifies IE settings for security zones to map all local web-nodes with no dots which do not refer to any zone to the Intranet Zone:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"UNCAsIntranet" = "1"

The Trojan modifies IE settings for security zones to map all urls to the Intranet Zone:

"IntranetName" = "1"

The Trojan modifies IE settings for security zones to map all web-nodes that bypassing the proxy to the Intranet Zone:

"ProxyBypass" = "1"

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):

   msconfig.exe:2036
   msconfig.exe:980
   %original file name%.exe:1652
   

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

   %Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe (601 bytes)
   %Documents and Settings%\%current user%\Application Data\msconfig.exe (601 bytes)

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

   [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   "18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"
   
   [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   "18.exe" = "%Documents and Settings%\%current user%\Application DataMicrosoft\System\Services\18.exe"

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: Tb1r9P0Yc
Product Name: y6HBs
Product Version: 39.4.57.10
Legal Copyright: f2J3QqPc1
Legal Trademarks: Fm7z4Q
Original Filename: w3plwanz.exe
Internal Name: w3plwanz.exe
File Version: 39.4.57.10
File Description: n7Z2Qsz
Comments: Ks01QdL
Language: English (United States)

Company Name: Tb1r9P0YcProduct Name: y6HBsProduct Version: 39.4.57.10Legal Copyright: f2J3QqPc1Legal Trademarks: Fm7z4QOriginal Filename: w3plwanz.exeInternal Name: w3plwanz.exeFile Version: 39.4.57.10File Description: n7Z2QszComments: Ks01QdLLanguage: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	72308	73728	4.8265	c84336e82918cec37f3ea79a49a3d630
.sdata	81920	98	4096	0.165497	f82e5da4c9dea69ee0442dd6cdf3c798
.rsrc	90112	920	4096	0.677505	261ce7d5ca55d40be25d89b8a4c67dcc
.reloc	98304	12	4096	0.011373	072f49b50563f8e05c421c9230b4d19d

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://www.google.com/	173.194.113.211
hxxp://www.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC	173.194.113.216
ssl.gstatic.com	173.194.113.223
clients1.google.com.ua	173.194.113.216
dude2014.ddns.net

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC HTTP/1.1

Accept: */*

Accept-Language: en-us

Accept-Encoding: gzip, deflate

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C)

Host: VVV.google.com.ua

Connection: Keep-Alive

HTTP/1.1 302 Found

Location: hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC&gws_rd=ssl

Cache-Control: private

Content-Type: text/html; charset=UTF-8

P3P: CP="This is not a P3P policy! See hXXp://VVV.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info."

Date: Wed, 14 Oct 2015 01:22:32 GMT

Server: gws

Content-Length: 276

X-XSS-Protection: 1; mode=block

X-Frame-Options: SAMEORIGIN

Set-Cookie: PREF=ID=1111111111111111:FF=0:TM=1444785752:LM=1444785752:V=1:S=hPEVu_27A7WcWOt9; expires=Thu, 31-Dec-2015 16:02:17 GMT; path=/; domain=.google.com.ua

Set-Cookie: NID=72=xpS9xZMJ2NlCgU98lX6KSw4FI8it8jQfKXlG4z4ICrCoQmZB8_PJYGR_YpwHBB5hXuUzKqw28S4TsFIvv8u7NMnrtJkixPJKf7NlpK_lvdlsXP0wpx4_sok8PbtXyGwX; expires=Thu, 14-Apr-2016 01:22:32 GMT; path=/; domain=.google.com.ua; HttpOnly

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HEAD><BODY>.<H1>302 Moved</H1>.The document has moved.<A HREF="hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC&gws_rd=ssl">here</A>...</BODY></HTML>..HTTP/1.1 302 Found..Location: hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC&gws_rd=ssl..Cache-Control: private..Content-Type: text/html; charset=UTF-8..P3P: CP="This is not a P3P policy! See hXXp://VVV.google.com/support/accounts/bin/answer.py?hl=en&answer=151657 for more info."..Date: Wed, 14 Oct 2015 01:22:32 GMT..Server: gws..Content-Length: 276..X-XSS-Protection: 1; mode=block..X-Frame-Options: SAMEORIGIN..Set-Cookie: PREF=ID=1111111111111111:FF=0:TM=1444785752:LM=1444785752:V=1:S=hPEVu_27A7WcWOt9; expires=Thu, 31-Dec-2015 16:02:17 GMT; path=/; domain=.google.com.ua..Set-Cookie: NID=72=xpS9xZMJ2NlCgU98lX6KSw4FI8it8jQfKXlG4z4ICrCoQmZB8_PJYGR_YpwHBB5hXuUzKqw28S4TsFIvv8u7NMnrtJkixPJKf7NlpK_lvdlsXP0wpx4_sok8PbtXyGwX; expires=Thu, 14-Apr-2016 01:22:32 GMT; path=/; domain=.google.com.ua; HttpOnly..<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HEAD><BODY>.<H1>302 Moved</H1>.The document has moved.<A HREF="hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC&gws_rd=ssl">here</A>...</BODY></HTML>....

<<< skipped >>>

GET / HTTP/1.1

Accept: */*

Accept-Language: en-us

Accept-Encoding: gzip, deflate

User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET4.0C)

Host: VVV.google.com

Connection: Keep-Alive

HTTP/1.1 302 Found

Cache-Control: private

Content-Type: text/html; charset=UTF-8

Location: hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC

Content-Length: 260

Date: Wed, 14 Oct 2015 01:22:32 GMT

Server: GFE/2.0

<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HEAD><BODY>.<H1>302 Moved</H1>.The document has moved.<A HREF="hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC">here</A>...</BODY></HTML>..HTTP/1.1 302 Found..Cache-Control: private..Content-Type: text/html; charset=UTF-8..Location: hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC..Content-Length: 260..Date: Wed, 14 Oct 2015 01:22:32 GMT..Server: GFE/2.0..<HTML><HEAD><meta http-equiv="content-type" content="text/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HEAD><BODY>.<H1>302 Moved</H1>.The document has moved.<A HREF="hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzFYJvjsYAC">here</A>...</BODY></HTML>....

Map

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

Strings from Dumps

iexplore.exe_220:

%?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

svchost.exe_1932:

.text

.text

`.data

`.data

.rsrc

.rsrc

ADVAPI32.dll

ADVAPI32.dll

KERNEL32.dll

KERNEL32.dll

NTDLL.DLL

NTDLL.DLL

RPCRT4.dll

RPCRT4.dll

NETAPI32.dll

NETAPI32.dll

ole32.dll

ole32.dll

ntdll.dll

ntdll.dll

RegCloseKey

RegCloseKey

RegOpenKeyExW

RegOpenKeyExW

GetProcessHeap

GetProcessHeap

NtOpenKey

NtOpenKey

svchost.pdb

svchost.pdb

\PIPE\

\PIPE\

Software\Microsoft\Windows NT\CurrentVersion\Svchost

Software\Microsoft\Windows NT\CurrentVersion\Svchost

\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\

\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\

5.1.2600.5512 (xpsp.080413-2111)

5.1.2600.5512 (xpsp.080413-2111)

svchost.exe

svchost.exe

Windows

Windows

Operating System

Operating System

5.1.2600.5512

5.1.2600.5512

svchost.exe_1932_rwx_10000000_0004D000:

`.rsrc

`.rsrc

ServerKeyloggerU

ServerKeyloggerU