Trojan-PSW.Win32.Zbot_e7d3f926be

by malwarelabrobot on June 30th, 2014 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Barys.12511 (B) (Emsisoft), Gen:Variant.Barys.12511 (AdAware), Trojan-PSW.Win32.Zbot.6.FD, 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.

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

MD5: e7d3f926bebfcd5696cf47c1d4b8a474
SHA1: 9408637a757aa482f754cb6df93956b709257a9d
SHA256: 1f6d16c92ba5399b037eed7f8a23ff77d5db13aa162aae2e97b3a3be9e144672
SSDeep: 6144:6tH6Bgu4BXdj3UltkC6sw9pyRZOv8Fy4ddOXpaatXXlGNflFwQ94iANPJs31u:6takXdCrwTiVdYXpaatX1ilFP2AM
Size: 424448 bytes
File type: EXE
Platform: WIN32
Entropy: Packed
PEID: UPolyXv05_v6
Company: no certificate found
Created at: 2014-06-25 01:37:47
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):

wscript.exe:468
%original file name%.exe:188
tmp.exe:1316
.exe:1388
peucn.exe:336

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

Explorer.EXE:1572

Mutexes

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

File activity

The process %original file name%.exe:188 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\mata2.bat (49 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\mata.bat (47 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\ .exe (35 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\rundll32-.txt (2321 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\invs.vbs (78 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp.exe (141 bytes)

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

%Documents and Settings%\%current user%\Local Settings\Temp\mata2.bat (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\mata.bat (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\rundll32-.txt (0 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\invs.vbs (0 bytes)

The process tmp.exe:1316 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\tmp5b32b9d3.bat (213 bytes)
%Documents and Settings%\%current user%\Application Data\Esoxvy\peucn.exe (141 bytes)

Registry activity

The process wscript.exe:468 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" = "A4 1C FC 7A CE EE 68 D5 32 A4 98 EE 55 C0 99 4A"

[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\ShellNoRoam\MUICache\C:\DOCUME~1\"%CurrentUserName%"\LOCALS~1\Temp]
"mata2.bat" = "mata2"

[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"

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 %original file name%.exe:188 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" = "0A 48 3C FA C8 1A 1B 13 D5 F5 7A BD 6C CD 82 50"

[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"

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

[HKCU\Software\Microsoft\Fuonuq]
"Kigyofme" = "BF 6B F1 6B 71 42 22 81 C3 ED 2B 8A E7 6F AD 63"

[HKCU\Software\Microsoft\Windows\ShellNoRoam\MUICache\%Documents and Settings%\%current user%\Local Settings\Temp]
"tmp.exe" = "tmp"
"mata.bat" = "mata"

The Trojan-PSW adds the reference to itself to be executed when a user logs on:

[HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
"Shell" = "%Documents and Settings%\%current user%\Local Settings\Temp\file.exe"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"ProxyBypass" = "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 urls to the Intranet Zone:

"IntranetName" = "1"

The process tmp.exe:1316 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" = "CE 54 D8 C8 D3 EF 2C 04 D5 1E A1 93 82 32 F7 0E"

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

[HKCU\Software\Microsoft\Fuonuq]
"Kigyofme" = "BF 6B F1 6B 71 42 22 81 C3 ED 2B 8A E7 6F AD 63"

The process .exe:1388 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" = "32 7A F6 E5 3D 50 DB A5 D8 CC 64 39 7C B4 F5 3B"

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

The process peucn.exe:336 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" = "EE 9F 67 0B B5 C5 9B 85 99 AE 5D 7E DF 28 9D 73"

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

Dropped PE files

MD5 File path
86e9df67542a6d4bc32d6ed0bb9e840b c:\Documents and Settings\"%CurrentUserName%"\Application Data\Esoxvy\peucn.exe
e0d21bee6dae44a7c6e1896d7a8c7463 c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\ .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
InternetQueryDataAvailable
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:

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 WS2_32.dll:

WSASend
send
closesocket

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

GetFileAttributesExW

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

LdrLoadDll
NtCreateThread

Propagation

VersionInfo

Company Name: Purchase Oder
Product Name: Purchase Oder
Product Version: 1.0.0.0
Legal Copyright: sfwe543wt4
Legal Trademarks: Purchase Oder
Original Filename: force.exe
Internal Name: force.exe
File Version: 1.0
File Description: BEUMER Maschinenfabrik
Comments: BEUMER Maschinenfabrik
Language: English (United States)

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.rsrc 8192 5396 5632 3.03845 9fbd3fcafac2904711a4b8c8814bd1f7
.text 16384 417436 417792 5.26611 2e310388ddaae6668b9ced01e7b4964d
.reloc 434176 12 512 0.084755 f260d38a0f2f1cc8d94eea5af5606035

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://seguroparaiphone.net/claro/cj/dp/config.bin 186.202.127.48
hxxp://seguroparaiphone.net/cgi-sys/suspendedpage.cgi 186.202.127.48


IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

ET TROJAN Possible Zbot Activity Common Download Struct
ET CURRENT_EVENTS Zbot Generic URI/Header Struct .bin

Traffic

GET /cgi-sys/suspendedpage.cgi 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: seguroparaiphone.net
Cache-Control: no-cache
Connection: Close


HTTP/1.1 200 OK
Date: Sat, 28 Jun 2014 21:09:07 GMT
Server: Apache/2.2.27 (Unix) mod_ssl/2.2.27 OpenSSL/1.0.1e-fips mod_bwlimited/1.4
Content-Length: 3639
Connection: close
Content-Type: text/html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "htt
p://VVV.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">.<html>
.<head>.<meta http-equiv="Content-type" content="text/html; c
harset=utf-8">.<title>Account Suspended</title>.<sty
le type="text/css">..title {..font-family: arial, verdana;..font-si
ze: 9pt;..font-weight: normal;.}..distributers {..font-family: arial,
verdana;..font-size: 11pt;..font-weight: normal;.}..info {..font-famil
y: arial, verdana;..font-size: 8pt;..font-weight: normal;.}..design {.
.font-family: arial, verdana;..font-size: 8pt;..font-weight: normal;.}
..menu {..border-top: 1px #374646 solid;..border-left: 1px #374646 ..


GET /claro/cj/dp/config.bin HTTP/1.1
Accept: */*
Connection: Close
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: seguroparaiphone.net
Cache-Control: no-cache


HTTP/1.1 302 Found
Date: Sat, 28 Jun 2014 21:09:06 GMT
Server: Apache/2.2.27 (Unix) mod_ssl/2.2.27 OpenSSL/1.0.1e-fips mod_bwlimited/1.4
Location: hXXp://seguroparaiphone.net/cgi-sys/suspendedpage.cgi
Content-Length: 374
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>302 Found</title>.</head><body
>.<h1>Found</h1>.<p>The document has moved <a
href="hXXp://seguroparaiphone.net/cgi-sys/suspendedpage.cgi">here&l
t;/a>.</p>.<hr>.<address>Apache/2.2.27 (Unix) mod
_ssl/2.2.27 OpenSSL/1.0.1e-fips mod_bwlimited/1.4 Server at seguropara
iphone.net Port 80</address>.</body></html>...


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

Explorer.EXE_1572_rwx_01E20000_00027000:

.text
`.data
.reloc
http://www.google.com/webhp
PR_OpenTCPSocket
gdiplus.dll
GdiplusShutdown
ole32.dll
gdi32.dll
: ;2*8.>
3.#70!2)
x#m`a`cmddt-
6 !26!1'1
7"52),,>
;<)?$*%,
71.(5;4=
(203,2$0
/?./,5 <
:>(<<44=3%
8%/<8/?)?/
%/>!
HTTP/1.1
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://
https://
HTTP/1.
SSSh,4
GetProcessHeap
KERNEL32.dll
SetKeyboardState
ExitWindowsEx
MsgWaitForMultipleObjects
MapVirtualKeyW
GetKeyboardState
OpenWindowStationW
GetProcessWindowStation
CreateWindowStationW
CloseWindowStation
SetProcessWindowStation
USER32.dll
RegOpenKeyExW
RegEnumKeyExW
RegCloseKey
RegCreateKeyExW
ADVAPI32.dll
PathIsURLW
UrlUnescapeA
SHDeleteKeyW
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
HttpSendRequestA
InternetCrackUrlA
HttpOpenRequestA
HttpAddRequestHeadersA
GetUrlCacheEntryInfoW
HttpAddRequestHeadersW
WININET.dll
OLEAUT32.dll
NETAPI32.dll
T%FOK
6 6&6/656{6
cGlobal\XXX
nspr4.dll
nss3.dll
SysShadow
kernel32.dll
"%s" %s
/c "%s"
%sx.%s
%sx
%Documents and Settings%\%current user%\Application Data\Yxvyf\uvis.byb
%Documents and Settings%\%current user%\Application Data\Yxvyf
uvis.byb
Global\{57DCB44C-9D05-5233-C44C-412397622FD9}
%Documents and Settings%\%current user%\Application Data
{C1A70669-2F20-C448-C44C-412397622FD9}


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):

    wscript.exe:468
    %original file name%.exe:188
    tmp.exe:1316
    .exe:1388
    peucn.exe:336

  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\mata2.bat (49 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\mata.bat (47 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\ .exe (35 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\rundll32-.txt (2321 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\invs.vbs (78 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\tmp.exe (141 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\tmp5b32b9d3.bat (213 bytes)
    %Documents and Settings%\%current user%\Application Data\Esoxvy\peucn.exe (141 bytes)

  5. Remove the references to the Trojan-PSW by modifying the following registry value(s) (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Winlogon]
    "Shell" = "%Documents and Settings%\%current user%\Local Settings\Temp\file.exe"

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

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

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