Trojan-PSW.Win32.Zbot_38a3c16901

by malwarelabrobot on July 1st, 2014 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Trojan.GenericKDZ.19029 (B) (Emsisoft), Trojan.GenericKDZ.19029 (AdAware), Trojan-PSW.Win32.Zbot.6.FD, Sinowal.YR, GenericInjector.YR, BackdoorCaphaw_QKKBAL.YR, TrojanPSWZbot.YR (Lavasoft MAS)
Behaviour: Trojan-PSW, Trojan, Backdoor


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: 38a3c16901da06640fab2a1e795aa986
SHA1: d6867c5988cba0a83e17391f3add67d06a678973
SHA256: 7b4b282941fedc85399670f04fd57b5f58be470e42cd658273b5ff27f27a523e
SSDeep: 6144:mTZsPjKQtUYWiumYZqXx1BLh0zPEdvvu4dTq /r6g:cKbhUYWVmYm/YzP8z/Z
Size: 252269 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: Premium Installer
Created at: 2000-08-17 16:50:39
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):

mscorsvw.exe:1912
%original file name%.exe:1944
caix.exe:1268

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

Explorer.EXE:840

Mutexes

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

File activity

The process %original file name%.exe:1944 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\tmp0fdc57ce.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Sari\caix.exe (252 bytes)

Registry activity

The process mscorsvw.exe:1912 makes changes in the system registry.
The Trojan-PSW 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:1944 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" = "39 EE DD 9E 33 AE DB B0 60 76 64 D5 C4 D7 84 9E"

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

The process caix.exe:1268 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" = "7D E8 19 01 95 94 B6 07 5F C9 24 30 48 F3 1B 78"

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

The process Explorer.EXE:840 makes changes in the system registry.
The Trojan-PSW creates and/or sets the following values in system registry:

[HKCU\Software\Microsoft\Windows\Shell\Bags\1\Desktop]
"Sort" = "0"
"SortDir" = "1"
"Mode" = "1"
"Col" = "4294967295"
"ScrollPos1024x768(1).y" = "0"
"ScrollPos1024x768(1).x" = "0"
"ItemPos1024x768(1)" = "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00"
"ColInfo" = "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00"

Dropped PE files

MD5 File path
764385ed4dc2e7b07b2a067ec9f9f00f c:\Documents and Settings\"%CurrentUserName%"\Application Data\Sari\caix.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

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

PlaySoundW

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

HttpEndRequestW
HttpEndRequestA
HttpSendRequestExA
HttpSendRequestW
InternetReadFileExA
InternetSetFilePointer
InternetQueryDataAvailable
HttpOpenRequestW
HttpSendRequestExW
InternetReadFile
HttpQueryInfoA
HttpSendRequestA
InternetCloseHandle
HttpOpenRequestA

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:

SetCursorPos
DefMDIChildProcA
DefFrameProcA
DefDlgProcA
GetClipboardData
DefMDIChildProcW
DefFrameProcW
GetUpdateRgn
RegisterClassA
GetDCEx
ReleaseCapture
SetCapture
DefWindowProcA
CallWindowProcA
GetUpdateRect
PeekMessageA
CallWindowProcW
GetMessagePos
GetCursorPos
EndPaint
BeginPaint
DefWindowProcW
RegisterClassExA
GetMessageA
DefDlgProcW
SwitchDesktop
OpenInputDesktop
RegisterClassExW
RegisterClassW
GetCapture
PeekMessageW
GetMessageW
GetWindowDC
TranslateMessage
GetDC
ReleaseDC

The Trojan-PSW installs the following user-mode hooks in ADVAPI32.dll:

CreateProcessAsUserA
CreateProcessAsUserW

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

WSASend
gethostbyname
send
closesocket
getaddrinfo

The Trojan-PSW installs the following user-mode hooks in kernel32.dll:

ExitProcess
GetFileAttributesExW

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

NtCreateThread

Propagation

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.code 4096 7890 8192 3.78945 0e00e534b5531373709bcd009d1d9e37
.text 12288 8236 8704 4.37126 9b0d0b7c3d8df7def98cd7e4bfec4a0f
.rdata 24576 192 512 1.20015 a1247f5e74b899e2c8762a602d31652d
.data 28672 4800 2048 3.2233 a979316f70148b39cd425e918288c248
.rsrc 36864 1536 1536 2.8224 20799406c724937905f91d5c2b791ec9

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://199.2.137.202/file-676da0.php
hxxp://dcu-a-202.microsoftinternetsafety.net/file-676da0.php 199.2.137.202


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET TROJAN DNS Reply Sinkhole - Microsoft - 199.2.137.0/24
ET TROJAN Generic - POST To .php w/Extended ASCII Characters

Traffic

POST /file-676da0.php HTTP/1.1
Accept: */*
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: 199.2.137.202
Content-Length: 128
Connection: Keep-Alive
Cache-Control: no-cache

.#.@Z..|.nG/.....t.%............A...x........i`.Q....`..c....eoTXN..Wk..ok.......6.[..I....M. ..G.y.........D.......0.....O0.I.A
HTTP/1.1 200 OK
Content-Type: text/html
Server: Microsoft-IIS/8.0
X-Powered-By: PHP/5.3.24
Date: Mon, 30 Jun 2014 15:40:58 GMT
Content-Length: 10208
...P.).O....o?..5K\.M?..W..{...x...>..!.@.=...&.......y&h.I.-..5...
..`...h.'..d...G....I.P...[K...*...2..#[.u.f..3.......K.....E......#u.
.....2{........^|\>..yn..W....n....K2"j...LN...*[email protected]..$.1
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..GB.;rIm@...|.._.20.. /.][email protected]....*.R.!.
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<<< skipped >>>


POST /file-676da0.php HTTP/1.1
Accept: */*
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: dcu-a-202.microsoftinternetsafety.net
Content-Length: 128
Connection: Keep-Alive
Cache-Control: no-cache

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.........D...}........le.T....e..f....`jQ]K..Rn..jn....
..3.^..L....H....B.|.........A.......5.....J5.L.D
HTTP/1.1 200 OK
Content-Type: text/html
Server: Microsoft-IIS/8.0
X-Powered-By: PHP/5.3.24
Date: Mon, 30 Jun 2014 15:41:08 GMT
Content-Length: 10208
...P.).O....o?..5K\.M?..W..{...x...>..!.@.=...&.......y&h.I.-..5...
..`...h.'..d...G....I.P...[K...*...2..#[.u.f..3.......K.....E......#u.
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<<< skipped >>>

POST /file-676da0.php HTTP/1.1


Accept: */*
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: dcu-a-202.microsoftinternetsafety.net
Content-Length: 128
Connection: Keep-Alive
Cache-Control: no-cache

.R/U/...Vo..NBaI.....b.H. Tso....2H..h.Vq^$.\..5.2%Wn..x.E.{[email protected]..>=PG..%..9v:u.t.e>J..7.}.
HTTP/1.1 200 OK
Content-Type: text/html
Server: Microsoft-IIS/8.0
X-Powered-By: PHP/5.3.24
Date: Mon, 30 Jun 2014 15:41:18 GMT
Content-Length: 10208
...P.).O....o?..5K\.M?..W..{...x...>..!.@.=...&.......y&h.I.-..5...
..`...h.'..d...G....I.P...[K...*...2..#[.u.f..3.......K.....E......#u.
.....2{........^|\>..yn..W....n....K2"j...LN...*[email protected]..$.1
m.$..e...d..Q...n.[..d..M.c.4%`...K...n..'....^.XW.p...,x#.....!.V.Y_9
..GB.;rIm@...|.._.20.. /.][email protected]....*.R.!.
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S...........eC).w......B..!."9re.go.b9y..RH./w.....-..O?WuU...f...
<<< skipped >>>

POST /file-676da0.php HTTP/1.1


Accept: */*
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: dcu-a-202.microsoftinternetsafety.net
Content-Length: 128
Connection: Keep-Alive
Cache-Control: no-cache

...Wu.K.\^1[....LJ.Yy.t.......ir=.....c.........-.........l....($2g. .........t..J.'r.5g...1.W..;....|......8..e....L.....3L.5.=
HTTP/1.1 200 OK
Content-Type: text/html
Server: Microsoft-IIS/8.0
X-Powered-By: PHP/5.3.24
Date: Mon, 30 Jun 2014 15:41:28 GMT
Content-Length: 10208
...P.).O....o?..5K\.M?..W..{...x...>..!.@.=...&.......y&h.I.-..5...
..`...h.'..d...G....I.P...[K...*...2..#[.u.f..3.......K.....E......#u.
.....2{........^|\>..yn..W....n....K2"j...LN...*[email protected]..$.1
m.$..e...d..Q...n.[..d..M.c.4%`...K...n..'....^.XW.p...,x#.....!.V.Y_9
..GB.;rIm@...|.._.20.. /.][email protected]....*.R.!.
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.......y.J$.s f...!V7.UH7....E.d.F.4.Dz..T#.R7.E7&.sA..v..........5s.f
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S...........eC).w......B..!."9re.go.b9y..RH./w.....-..O?WuU...f...
<<< skipped >>>

POST /file-676da0.php HTTP/1.1


Accept: */*
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: dcu-a-202.microsoftinternetsafety.net
Content-Length: 128
Connection: Keep-Alive
Cache-Control: no-cache

qb.h:.......:.ET.......6}^*
.....L6z...(. Zv"..K.L[)..|..;............/i..fA.Z.Fn.>..7..*-N.:.f..[email protected]}.[{.G.D.
[email protected]...
HTTP/1.1 200 OK
Content-Type: text/html
Server: Microsoft-IIS/8.0
X-Powered-By: PHP/5.3.24
Date: Mon, 30 Jun 2014 15:41:38 GMT
Content-Length: 10208
...P.).O....o?..5K\.M?..W..{...x...>..!.@.=...&.......y&h.I.-..5...
..`...h.'..d...G....I.P...[K...*...2..#[.u.f..3.......K.....E......#u.
.....2{........^|\>..yn..W....n....K2"j...LN...*[email protected]..$.1
m.$..e...d..Q...n.[..d..M.c.4%`...K...n..'....^.XW.p...,x#.....!.V.Y_9
..GB.;rIm@...|.._.20.. /.][email protected]....*.R.!.
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.........}......zz.........!8J.3xn.L..s..MF...V.._A.i..."....UH0..Pb..
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S...........eC).w......B..!."9re.go.b9y..RH./w.....-..O?WuU...f...
<<< skipped >>>

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

Explorer.EXE_840_rwx_01CD0000_0003B000:

.text
`.data
.reloc
%s, u %s %u u:u:u GMT
HTTP/1.1
HTTP/1.0
http://
; charset=%s
HTTP/1.1 %u %s
Date: %s
Content-Length: %u
Expires: %s
Content-Type: %s%s
ID: %s
value_%s
value_%s_%s
%s = "%s";
update.exe
config.bin
PR_OpenTCPSocket
cit_ffcookie.module
cit_video.module
%ds~U;MM
userenv.dll
del "%s"
if exist "%s" goto d
del /F "%s"
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1)
urlmon.dll
cabinet.dll
http://xxxxxxxx.com/xxxx/xxxx.php
%s%s%s
gdiplus.dll
GdiplusShutdown
ole32.dll
gdi32.dll
6;:5;66"
,1;(,; = 1
'472%9,{
F@ICTQ}cRTWAunO}mmts}NX~csgzn~)[jzyemer\]ika
8/3.xae4LOa
6 !26!1'1!
https://
HTTP/1.
facebook.com
Cookie: %s
Referer: %s
Accept: %s
Accept-Language: %s
Accept-Encoding: %s
_getFirefoxCookie
http://www.google.com/webhp
SSShD
SSShXe
SSShye
GetProcessHeap
CreatePipe
KERNEL32.dll
MsgWaitForMultipleObjects
OpenWindowStationW
GetProcessWindowStation
CreateWindowStationW
CloseWindowStation
SetProcessWindowStation
SetKeyboardState
ExitWindowsEx
GetKeyboardState
MapVirtualKeyW
GetKeyboardLayoutList
USER32.dll
RegCreateKeyExW
RegOpenKeyExW
RegCloseKey
RegCreateKeyW
RegEnumKeyW
RegQueryInfoKeyW
RegEnumKeyExW
ADVAPI32.dll
UrlUnescapeA
SHDeleteKeyW
PathIsURLW
SHLWAPI.dll
ShellExecuteW
SHELL32.dll
Secur32.dll
SetViewportOrgEx
GDI32.dll
WS2_32.dll
PFXImportCertStore
CertDeleteCertificateFromStore
CertOpenSystemStoreW
CertCloseStore
CertEnumCertificatesInStore
CertDuplicateCertificateContext
PFXExportCertStoreEx
CRYPT32.dll
HttpSendRequestExA
HttpQueryInfoA
HttpSendRequestExW
HttpSendRequestW
HttpOpenRequestA
HttpOpenRequestW
HttpEndRequestA
HttpSendRequestA
HttpEndRequestW
InternetCrackUrlA
HttpAddRequestHeadersW
GetUrlCacheEntryInfoW
HttpAddRequestHeadersA
WININET.dll
OLEAUT32.dll
NETAPI32.dll
VERSION.dll
WINMM.dll
PSSSSSSh
$E.oMmja
3$3*30383
6|7k7u7
9 :1:::@:
42>204:4
sXXXX
nspr4.dll
chrome.dll
\StringFileInfo\xx\%s
ntdll.dll
kernel32.dll
"%s" %s
/c "%s"
%sx.%s
%sx
SELECT * FROM %s
Company: %s
Product: %s
Version: %s
Software\Microsoft\Windows\CurrentVersion\Uninstall
%u: %s | %s | %s
Global\XXX
SysShadow
Chrome
Firefox
%Documents and Settings%\%current user%\Application Data
{E8DD392B-1B0B-B9A9-DEF0-A9AD5D9B879E}
%Documents and Settings%\%current user%\Application Data\Toytri\liyxa.apd
%Documents and Settings%\%current user%\Application Data\Toytri
liyxa.apd
Global\{7EA68B0E-A92E-2FD2-DEF0-A9AD5D9B879E}
%Documents and Settings%\%current user%\Application Data\Mazy\cuvok.qys
%Documents and Settings%\%current user%\Application Data\Mazy
cuvok.qys


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):

    mscorsvw.exe:1912
    %original file name%.exe:1944
    caix.exe:1268

  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\tmp0fdc57ce.bat (177 bytes)
    %Documents and Settings%\%current user%\Application Data\Sari\caix.exe (252 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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