Gen.Variant.Buzy.1185_e06851fe78

by malwarelabrobot on December 13th, 2014 in Malware Descriptions.

Gen:Variant.Buzy.1185 (B) (Emsisoft), Gen:Variant.Buzy.1185 (AdAware), Trojan.Win32.FlyStudio.FD, GenericEmailWorm.YR, TrojanFlyStudio.YR (Lavasoft MAS)
Behaviour: Trojan, Worm, EmailWorm


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: e06851fe782fc88c89803ef8ed15a381
SHA1: e2ecc5ab41502aae6d450416f681130a3c6e790c
SHA256: 2ba88653dc944f002bc2e77f600c29bf05ac1ba101e879bf80a60c41bb898135
SSDeep: 49152:Z/xWWwxacxWSqdwk0cQHGiYYSzSY5voVU7zQYOmR5 quyZl22YG0gfIlC7uK9IO :XlwxacxBqdwkLQHHhsSYt8nmR8mlcgfi
Size: 2662400 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6, MicrosoftVisualC, MicrosoftVisualCv50v60MFC, MicrosoftVisualC50, Armadillov171
Company: PCPerformer
Created at: 2014-10-20 17:29:27
Analyzed on: WindowsXPESX 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
EmailWorm Worm can send e-mails.


Process activity

The Trojan creates the following process(es):

regsvr32.exe:1492
mscorsvw.exe:1912

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

%original file name%.exe:1776

Mutexes

The following mutexes were created/opened:

ZonesLockedCacheCounterMutex
ZonesCounterMutex
ZonesCacheCounterMutex
WininetProxyRegistryMutex
WininetConnectionMutex
WininetStartupMutex
c:!documents and settings!adm!local settings!history!history.ie5!
c:!documents and settings!adm!cookies!
_!MSFTHISTORY!_
c:!documents and settings!adm!local settings!temporary internet files!content.ie5!
RasPbFile
ShimCacheMutex

File activity

The process %original file name%.exe:1776 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%System%\dm.dll (3902 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\xbb[1].txt (21 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
C:\SkinH_EL.dll (88 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\desktop.ini (67 bytes)

Registry activity

The process regsvr32.exe:1492 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A2 D6 7F E4 79 74 47 DC 10 F1 FF 0D B1 48 E0 13"

[HKCR\dm.dmsoft\CLSID]
"(Default)" = "{26037A0E-7CBD-4FFF-9C63-56F2D0770214}"

[HKCR\Interface\{F3F54BC2-D6D1-4A85-B943-16287ECEA64C}\TypeLib]
"(Default)" = "{84288AAD-BA02-4EF2-85EC-3FAD4D11354D}"

[HKCR\TypeLib\{84288AAD-BA02-4EF2-85EC-3FAD4D11354D}\1.0\HELPDIR]
"(Default)" = "%System%\"

[HKCR\CLSID\{26037A0E-7CBD-4FFF-9C63-56F2D0770214}\InprocServer32]
"ThreadingModel" = "Apartment"

[HKCR\CLSID\{26037A0E-7CBD-4FFF-9C63-56F2D0770214}]
"(Default)" = "dm.dmsoft"

[HKCR\TypeLib\{84288AAD-BA02-4EF2-85EC-3FAD4D11354D}\1.0\FLAGS]
"(Default)" = "0"

[HKCR\dm.dmsoft]
"(Default)" = "dm.dmsoft"

[HKCR\Interface\{F3F54BC2-D6D1-4A85-B943-16287ECEA64C}]
"(Default)" = "Idmsoft"

[HKCR\dm.dmsoft\CurVer]
"(Default)" = "dm.dmsoft"

[HKCR\CLSID\{26037A0E-7CBD-4FFF-9C63-56F2D0770214}\ProgID]
"(Default)" = "dm.dmsoft"

[HKCR\Interface\{F3F54BC2-D6D1-4A85-B943-16287ECEA64C}\ProxyStubClsid32]
"(Default)" = "{00020424-0000-0000-C000-000000000046}"

[HKCR\Interface\{F3F54BC2-D6D1-4A85-B943-16287ECEA64C}\ProxyStubClsid]
"(Default)" = "{00020424-0000-0000-C000-000000000046}"

[HKCR\TypeLib\{84288AAD-BA02-4EF2-85EC-3FAD4D11354D}\1.0\0\win32]
"(Default)" = "%System%\dm.dll"

[HKCR\TypeLib\{84288AAD-BA02-4EF2-85EC-3FAD4D11354D}\1.0]
"(Default)" = "Dm"

[HKCR\CLSID\{26037A0E-7CBD-4FFF-9C63-56F2D0770214}\InprocServer32]
"(Default)" = "%System%\dm.dll"

[HKCR\Interface\{F3F54BC2-D6D1-4A85-B943-16287ECEA64C}\TypeLib]
"Version" = "1.0"

The process mscorsvw.exe:1912 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\.NETFramework\v2.0.50727\NGenService\State]
"AccumulatedWaitIdleTime" = "2340000"

The process %original file name%.exe:1776 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Directory" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path4]
"CacheLimit" = "65452"
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache4"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CacheLimit" = "65452"

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

"Cookies" = "%Documents and Settings%\%current user%\Cookies"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path2]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache2"

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

[HKCU\Software\Microsoft\Multimedia\DrawDib]
"vga.drv 1024x768x32(BGR 0)" = "31,31,31,31"

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

[HKLM\System\CurrentControlSet\Hardware Profiles\0001\Software\Microsoft\windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CacheLimit" = "65452"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 16 00 00 00 01 00 00 00 00 00 00 00"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "36 DB 85 6B FF F5 D2 CC 0A 2A E6 C4 43 0F 1C 39"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path1]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache1"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CacheLimit" = "65452"

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

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

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths\path3]
"CachePath" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\Cache3"

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Cache\Paths]
"Paths" = "4"

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 web-nodes that bypassing the proxy to the Intranet Zone:

"ProxyBypass" = "1"

Proxy settings are disabled:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"ProxyEnable" = "0"

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

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

The Trojan deletes the following value(s) in system registry:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"AutoConfigURL"
"ProxyServer"
"ProxyOverride"

Dropped PE files

MD5 File path
147127382e001f495d1842ee7a9e7912 c:\SkinH_EL.dll
e8889a55641fa57bcb588571f5bcbc63 c:\WINDOWS\system32\dm.dll

HOSTS file anomalies

No changes have been detected.

Rootkit activity

No anomalies have been detected.

Propagation

VersionInfo

Company Name:
Product Name: CF??????
Product Version: 10.1.0.0
Legal Copyright: ?????? ????????
Legal Trademarks:
Original Filename:
Internal Name:
File Version: 10.1.0.0
File Description: ?????
Comments: ??????????(http://www.eyuyan.com)
Language: English (United States)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 480658 483328 4.53626 3908cc489047d3bf48642814a859a6b4
.rdata 487424 2071086 2072576 5.45495 87f6854e0d4dd7dca333f6d72365206b
.data 2560000 253290 65536 3.39794 bcd645cfe9c08a9a81ad2a37e9c8ee9a
.rsrc 2813952 33896 36864 3.54139 da83dc56aaa035c9bc0b2a95ea740094

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://hkvhost919.800cdn.com/xixi/bingwa/2.19.txt
hxxp://hkvhost919.800cdn.com/xbb.txt
hxxp://www.wei117.tk/xbb.txt 113.10.174.178
hxxp://www.wei117.tk/xixi/bingwa/2.19.txt 113.10.174.178


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET CURRENT_EVENTS DNS Query to a .tk domain - Likely Hostile
ET POLICY Unsupported/Fake Windows NT Version 5.0
ET CURRENT_EVENTS HTTP Request to a *.tk domain

Traffic

GET /xbb.txt HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Referer: hXXp://VVV.wei117.tk/xbb.txt
Accept-Language: zh-cn
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Host: VVV.wei117.tk
Cache-Control: no-cache


HTTP/1.0 200 OK
C


GET /xixi/bingwa/2.19.txt HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Referer: hXXp://VVV.wei117.tk/xixi/bingwa/2.19.txt
Accept-Language: zh-cn
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
Host: VVV.wei117.tk
Cache-Control: no-cache


HTTP/1.0 404 Not Found
Cache-Control: private
Content-Type: text/html; charset=utf-8
Server: Microsoft-IIS/8.0
X-Powered-By: ASP.NET
Date: Fri, 12 Dec 2014 05:11:42 GMT
Content-Length: 4748
X-Cache: MISS from test.abc.com
X-Cache-Lookup: MISS from test.abc.com:80
Via: 1.0 test.abc.com (squid/3.0.STABLE20)
Connection: close
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "hXXp://ww
w.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> .<html xmlns="hXXp://
VVV.w3.org/1999/xhtml"> .<head> .<title>IIS 8.0 .......
..... - 404.0 - Not Found</title> .<style type="text/css">
.<!-- .body{margin:0;font-size:.7em;font-family:Verdana,Arial,Helv
etica,sans-serif;} .code{margin:0;color:#006600;font-size:1.1em;font-w
eight:bold;} ..config_source code{font-size:.8em;color:#000000;} .pre{
margin:0;font-size:1.4em;word-wrap:break-word;} .ul,ol{margin:10px 0 1
0px 5px;} .ul.first,ol.first{margin-top:5px;} .fieldset{padding:0 15px
10px 15px;word-break:break-all;} ..summary-container fieldset{padding
-bottom:5px;margin-top:4px;} .legend.no-expand-all{padding:2px 15px 4p
x 10px;margin:0 0 0 -12px;} .legend{color:#333333;;margin:4px 0 8px -1
2px;_margin-top:0px; .font-weight:bold;font-size:1em;} .a:link,a:visit
ed{color:#007EFF;font-weight:bold;} .a:hover{text-decoration:none;} .h
1{font-size:2.4em;margin:0;color:#FFF;} .h2{font-size:1.7em;margin:0;c
olor:#CC0000;} .h3{font-size:1.4em;margin:10px 0 0 0;color:#CC0000;} .
h4{font-size:1.2em;margin:10px 0 5px 0; .}#header{width:96%;margin:0 0
0 0;padding:6px 2% 6px 2%;font-family:"trebuchet MS",Verdana,sans-ser
if; . color:#FFF;background-color:#5C87B2; .}#content{margin:0 0 0 2%;
position:relative;} ..summary-container,.content-container{background:
#FFF;width:96%;margin-top:8px;padding:10px;position:relative;} ..conte
nt-container p{margin:0 0 10px 0; .}#details-left{width:35%;float:

<<< skipped >>>

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

%original file name%.exe_1776:

.text
`.rdata
@.data
.rsrc
t$(SSh
~%UVW
.tTPV
FTPjK
FtPj;
F.PjRWj
u.WWj
u.VVj
u$SShe
wininet.dll
SkinH_EL.dll
psapi.dll
HttpOpenRequestA
HttpSendRequestA
HttpQueryInfoA
hXXp://VVV.wei117.tk/xixi/bingwa/2.19.txt
hXXp://VVV.wei117.tk/xbb.txt
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
http=
HTTP/1.1
Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
Content-Type: application/x-www-form-urlencoded
hXXp://
%s;7*
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k%UPp
fg.VG
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.wdd!
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*.Ea]S
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fTpe
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-.Mdl
\-A}=3K
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$.Zcqn
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KERNEL32.DLL
COMCTL32.dll
GDI32.dll
MSIMG32.dll
MSVCRT.dll
MSVFW32.dll
USER32.dll
\dm.dll
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(.text\
'@.tp0
{43C6DBBB-BEAD-4DFB-B6D2-52C5CDB5B70A} = s 'Dm'
'Dm.EXE'
val AppID = s {43C6DBBB-BEAD-4DFB-B6D2-52C5CDB5B70A}
dm.dmsoft = s 'dm.dmsoft'
CLSID = s '{26037A0E-7CBD-4FFF-9C63-56F2D0770214}'
CurVer = s 'dm.dmsoft'
ForceRemove {26037A0E-7CBD-4FFF-9C63-56F2D0770214} = s 'dm.dmsoft'
ProgID = s 'dm.dmsoft'
stdole2.tlbWWW
~cmdWd
KeyPress
.aKeyDownWd
MKeyUpWWWd
ShowScrMsgWW
msgWd
SetShowErrorMsgW
>SGetWindowStateWW
U@SetWindowSizeWWWd
SetWindowStateWWd
iRSetKeypadDelayWWd
BkeypadWW
SetExportDictWWWd
keyWd
FindWindowSuperW
qHKeyDownCharW
pOkey_strWd
KeyUpCharWWWd
KeyPressChard
KeyPressStrWd
EnableKeypadPatchWWWd
=PEnableKeypadSyncd
EnableRealKeypadd
GetKeyStateWd
[.ReadFiled
WaitKeyW
!key_coded
joEnumWindowSuperW
urlW
=EnableKeypadMsgWd
EnableMouseMsgWWd
method KeyPressWWW
method KeyDown
method KeyUpWW
method ShowScrMsgW
method SetShowErrorMsg
method GetWindowStateW
method SetWindowSizeWW
method SetWindowStateW
method SetKeypadDelayW
method SetExportDictWW
method FindWindowSuper
method KeyDownChar
method KeyUpCharWW
method KeyPressCharWWW
method KeyPressStr
method EnableKeypadPatchWW
method EnableKeypadSyncWWW
method EnableRealKeypadWWW
method GetKeyState
method WaitKey
method EnumWindowSuper
method EnableKeypadMsg
method EnableMouseMsgW
ADVAPI32.dll
IMM32.dll
MFC42.DLL
ole32.dll
OLEAUT32.dll
SHELL32.dll
VERSION.dll
WINMM.dll
WS2_32.dll
RegCloseKey
dm.dll
\dm.dll /s
[email protected]
%*.*f
CNotSupportedException
commctrl_DragListMsg
Afx:%x:%x:%x:%x:%x
Afx:%x:%x
COMCTL32.DLL
CCmdTarget
__MSVCRT_HEAP_SELECT
user32.dll
portuguese-brazilian
iphlpapi.dll
SHLWAPI.dll
MPR.dll
RASAPI32.dll
GetProcessHeap
WinExec
GetWindowsDirectoryA
GetCPInfo
KERNEL32.dll
GetKeyState
GetKeyboardLayout
CreateDialogIndirectParamA
UnhookWindowsHookEx
SetWindowsHookExA
GetViewportOrgEx
SetViewportOrgEx
OffsetViewportOrgEx
SetViewportExtEx
ScaleViewportExtEx
GetViewportExtEx
WINSPOOL.DRV
comdlg32.dll
RegOpenKeyExA
RegCreateKeyExA
ShellExecuteA
WSOCK32.dll
WININET.dll
.PAVCException@@
.PAVCNotSupportedException@@
.PAVCFileException@@
(*.prn)|*.prn|
(*.*)|*.*||
Shell32.dll
Mpr.dll
Advapi32.dll
User32.dll
Gdi32.dll
Kernel32.dll
(&07-034/)7 '
?? / %d]
%d / %d]
: %d]
(*.WAV;*.MID)|*.WAV;*.MID|WAV
(*.WAV)|*.WAV|MIDI
(*.MID)|*.MID|
(*.txt)|*.txt|
(*.JPG;*.BMP;*.GIF;*.ICO;*.CUR)|*.JPG;*.BMP;*.GIF;*.ICO;*.CUR|JPG
(*.JPG)|*.JPG|BMP
(*.BMP)|*.BMP|GIF
(*.GIF)|*.GIF|
(*.ICO)|*.ICO|
(*.CUR)|*.CUR|
%s:%d
windows
out.prn
%d.%d
%d / %d
%d/%d
Bogus message code %d
(%d-%d):
%ld%c
VVV.dywt.com.cn
Service Pack %d
Windows 2003
Windows XP
Windows 2000
Windows NT
Windows ??
Windows Millenium Edition
Windows 98 Second Edition
Windows 98 SP1
Windows 98
Windows 95 OSR2
Windows 95 SP1
Windows 95
Windows CE
Windows
Microsoft Windows Me
Microsoft Windows 98
Microsoft Windows 95
Microsoft Windows 2003
Microsoft Windows XP
Microsoft Windows 2000
Microsoft Windows NT
%s <%s>
Reply-To: %s
From: %s
To: %s
Subject: %s
Date: %s
Cc: %s
%a, %d %b %Y %H:%M:%S
SMTP
.PAVCObject@@
.PAVCSimpleException@@
.PAVCMemoryException@@
.?AVCNotSupportedException@@
.PAVCResourceException@@
.PAVCUserException@@
.?AVCCmdTarget@@
.?AVCCmdUI@@
.?AVCTestCmdUI@@
.PAVCArchiveException@@
zcÁ
VVV.wei117.tk
c:\%original file name%.exe
#include "l.chs\afxres.rc" // Standard components
1, 0, 6, 6
3, 1227, 0, 0
(*.*)
10.1.0.0
(hXXp://VVV.eyuyan.com)

%original file name%.exe_1776_rwx_10001000_00039000:

L$(h%f
SSh0j
msctls_hotkey32
TVCLHotKey
THotKey
\skinh.she
}uo,x6l5k%x-l h
9p%s m)t4`#b
e"m?c&y1`Ð<
SetViewportOrgEx
SetViewportExtEx
SetWindowsHookExA
UnhookWindowsHookEx
EnumThreadWindows
EnumChildWindows
`c%US.4/
!#$<#$#=
.text
`.rdata
@.data
.rsrc
@.UPX0
`.UPX1
`.reloc


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):

    regsvr32.exe:1492
    mscorsvw.exe:1912

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

    %System%\dm.dll (3902 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\xbb[1].txt (21 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\desktop.ini (67 bytes)
    C:\SkinH_EL.dll (88 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\OPQNSD2J\desktop.ini (67 bytes)

  4. Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
  5. Reboot the computer.

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

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