Gen.Variant.MSIL.8_2c48d33551

by malwarelabrobot on October 15th, 2015 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.MSIL.8 (B) (Emsisoft), Gen:Variant.MSIL.8 (AdAware), Backdoor.Win32.Farfli.FD, Backdoor.Win32.Xtrat.FD, Trojan.Win32.IEDummy.FD, GenericAutorunWorm.YR, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan, Backdoor, Worm, WormAutorun


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Requires JavaScript enabled!

Summary
Dynamic Analysis
Static Analysis
Network Activity
Map
Strings from Dumps
Removals

MD5: 2c48d33551e5470844541697642295d1
SHA1: b1baaa998eca59703ac7759c616ed892015ad1c2
SHA256: 7225d858548c7b2137d2e7719933bc96a33aaad70bff7370171e47ade138e7a5
SSDeep: 1536:J6kEGbcfi53KFebyWt6Pesgwd8DWBuQOr7uSE:J4GbNOwzt4esRcr7G
Size: 90112 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: no certificate found
Created at: 2015-09-22 23:34:35
Analyzed on: WindowsXP SP3 32-bit


Summary:

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

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.

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)

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:

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="te
xt/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HE
AD><BODY>.<H1>302 Moved</H1>.The document has mov
ed.<A HREF="hXXps://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYz
FYJvjsYAC&gws_rd=ssl">here</A>...</BODY></HTML&g
t;..HTTP/1.1 302 Found..Location: hXXps://VVV.google.com.ua/?gfe_rd=cr
&ei=WK4dVrnkKYzFYJvjsYAC&gws_rd=ssl..Cache-Control: private..Content-T
ype: 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=1516
57 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:L
M=1444785752:V=1:S=hPEVu_27A7WcWOt9; expires=Thu, 31-Dec-2015 16:02:17
 GMT; path=/; domain=.google.com.ua..Set-Cookie: NID=72=xpS9xZMJ2NlCgU
98lX6KSw4FI8it8jQfKXlG4z4ICrCoQmZB8_PJYGR_YpwHBB5hXuUzKqw28S4TsFIvv8u7
NMnrtJkixPJKf7NlpK_lvdlsXP0wpx4_sok8PbtXyGwX; expires=Thu, 14-Apr-2016
 01:22:32 GMT; path=/; domain=.google.com.ua; HttpOnly..<HTML>&l
t;HEAD><meta http-equiv="content-type" content="text/html;charse
t=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="te
xt/html;charset=utf-8">.<TITLE>302 Moved</TITLE></HE
AD><BODY>.<H1>302 Moved</H1>.The document has mov
ed.<A HREF="hXXp://VVV.google.com.ua/?gfe_rd=cr&ei=WK4dVrnkKYzF
YJvjsYAC">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=WK4dVrnkKYzFYJvjsYA
C..Content-Length: 260..Date: Wed, 14 Oct 2015 01:22:32 GMT..Server: G
FE/2.0..<HTML><HEAD><meta http-equiv="content-type" con
tent="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=WK4d
VrnkKYzFYJvjsYAC">here</A>...</BODY></HTML>....

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

iexplore.exe_220:

%?9-*09,*19}*09
.text
`.data
.rsrc
msvcrt.dll
KERNEL32.dll
NTDLL.DLL
USER32.dll
SHLWAPI.dll
SHDOCVW.dll
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
IE-X-X
rsabase.dll
System\CurrentControlSet\Control\Windows
dw15 -x -s %u
watson.microsoft.com
IEWatsonURL
%s -h %u
iedw.exe
Iexplore.XPExceptionFilter
jscript.DLL
mshtml.dll
mlang.dll
urlmon.dll
wininet.dll
shdocvw.DLL
browseui.DLL
comctl32.DLL
IEXPLORE.EXE
iexplore.pdb
ADVAPI32.dll
MsgWaitForMultipleObjects
IExplorer.EXE
IIIIIB(II<.Fg
7?_____ZZSSH%
)z.UUUUUUUU
,....Qym
````2```
{.QLQIIIKGKGKGKGKGKG
;33;33;0
8888880
8887080
browseui.dll
shdocvw.dll
6.00.2900.5512 (xpsp.080413-2105)
Windows
Operating System
6.00.2900.5512

svchost.exe_1932:

.text
`.data
.rsrc
ADVAPI32.dll
KERNEL32.dll
NTDLL.DLL
RPCRT4.dll
NETAPI32.dll
ole32.dll
ntdll.dll
RegCloseKey
RegOpenKeyExW
GetProcessHeap
NtOpenKey
svchost.pdb
\PIPE\
Software\Microsoft\Windows NT\CurrentVersion\Svchost
\Registry\Machine\System\CurrentControlSet\Control\SecurePipeServers\
5.1.2600.5512 (xpsp.080413-2111)
svchost.exe
Windows
Operating System
5.1.2600.5512

svchost.exe_1932_rwx_10000000_0004D000:

`.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
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
n%c@xt
.pab:X
URLDbI
KERNEL32.DLL
ntdll.dll
oleaut32.dll
shlwapi.dll
wininet.dll
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
dude2014.ddns.net
Server.exe
{5460C4DF-B266-909E-CB58-E32B79832EB2}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
PTF.ftpserver.com
ftpuser

iexplore.exe_1320:

%?9-*09,*19}*09
.text
`.data
.rsrc
msvcrt.dll
KERNEL32.dll
NTDLL.DLL
USER32.dll
SHLWAPI.dll
SHDOCVW.dll
Software\Microsoft\Windows\CurrentVersion\Explorer\BrowseNewProcess
IE-X-X
rsabase.dll
System\CurrentControlSet\Control\Windows
dw15 -x -s %u
watson.microsoft.com
IEWatsonURL
%s -h %u
iedw.exe
Iexplore.XPExceptionFilter
jscript.DLL
mshtml.dll
mlang.dll
urlmon.dll
wininet.dll
shdocvw.DLL
browseui.DLL
comctl32.DLL
IEXPLORE.EXE
iexplore.pdb
ADVAPI32.dll
MsgWaitForMultipleObjects
IExplorer.EXE
IIIIIB(II<.Fg
7?_____ZZSSH%
)z.UUUUUUUU
,....Qym
````2```
{.QLQIIIKGKGKGKGKGKG
;33;33;0
8888880
8887080
browseui.dll
shdocvw.dll
6.00.2900.5512 (xpsp.080413-2105)
Windows
Operating System
6.00.2900.5512

iexplore.exe_1320_rwx_10000000_0004D000:

`.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
KWindows
TServerKeylogger
GetWindowsDirectoryW
RegOpenKeyExW
RegCreateKeyW
RegCloseKey
RegOpenKeyExA
FindExecutableW
ShellExecuteW
SHDeleteKeyW
URLDownloadToCacheFileW
UnhookWindowsHookEx
SetWindowsHookExW
MapVirtualKeyW
GetKeyboardLayout
GetKeyState
GetKeyboardType
GetKeyboardState
FtpPutFileW
FtpSetCurrentDirectoryW
.idata
.rdata
P.reloc
P.rsrc
n%c@xt
.pab:X
URLDbI
KERNEL32.DLL
ntdll.dll
oleaut32.dll
shlwapi.dll
wininet.dll
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
dude2014.ddns.net
Server.exe
{5460C4DF-B266-909E-CB58-E32B79832EB2}
HKCU\Software\Microsoft\Windows\CurrentVersion\Run
PTF.ftpserver.com
ftpuser
%Documents and Settings%\%current user%\Application Data\msconfig.exe
%Program Files%\Internet Explorer\iexplore.exe


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.

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