TrojanPSW.Win32.Zbot_762d7553a6 – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

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

%original file name%.exe:1808
udxio.exe:1108

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

Explorer.EXE:532

File activity

The process %original file name%.exe:1808 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\tmp9f9e02a7.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Ywrot\udxio.exe (163 bytes)

Registry activity

The process %original file name%.exe:1808 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" = "6A 35 21 F5 1B 1D FF 24 08 32 31 49 34 02 1C F5"

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

[HKCU\Software\Microsoft\Vyum]
"Ecro" = "17 4E EB 52 27 63 8A 0B F1 ED 62 06 D9 14 7F 02"

The process udxio.exe:1108 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" = "DA 4B 9E 04 D6 2E F8 E2 2E 5A 3E A9 95 D2 2A 40"

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

Dropped PE files

MD5	File path
8433911f5023724d8bae5f432f55294d	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Ywrot\udxio.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

Removals

Remove it with Ad-Aware

Click (here) to download and install Ad-Aware Free Antivirus.
Update the definition files.
Run a full scan of your computer.

Manual removal*

Scan a system with an anti-rootkit tool.
Terminate malicious process(es) (How to End a Process With the Task Manager):
%original file name%.exe:1808
udxio.exe:1108
Delete the original Trojan-PSW file.
Delete or disinfect the following files created/modified by the Trojan-PSW:
%Documents and Settings%\%current user%\Local Settings\Temp\tmp9f9e02a7.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Ywrot\udxio.exe (163 bytes)
Clean the Temporary Internet Files folder, which may contain infected files (How to clean Temporary Internet Files folder).
Reboot the computer.

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

Static Analysis

VersionInfo

Company Name: Rloqu Tdhsoemqe
Product Name: Rloqu Vhqosjvoc Wjpfuadmi
Product Version: 40, 30, 113, 41
Legal Copyright: Copyright (c) Rloqu Tdhsoemqe 2002-2007
Legal Trademarks:
Original Filename: Rloqu.exe
Internal Name: Rloqu
File Version: 40, 30, 113, 41
File Description: Rloqu Vhqosjvoc Wjpfuadmi
Comments:
Language: Language Neutral

Company Name: Rloqu TdhsoemqeProduct Name: Rloqu Vhqosjvoc WjpfuadmiProduct Version: 40, 30, 113, 41Legal Copyright: Copyright (c) Rloqu Tdhsoemqe 2002-2007Legal Trademarks: Original Filename: Rloqu.exeInternal Name: RloquFile Version: 40, 30, 113, 41File Description: Rloqu Vhqosjvoc WjpfuadmiComments: Language: Language Neutral

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
UPX0	4096	139264	0	0	d41d8cd98f00b204e9800998ecf8427e
UPX1	143360	151552	151552	5.48669	7182a479124d838f637449d37975418d
.rsrc	294912	12288	10752	3.39431	0853612434d8be7197c9f57cb6474a16

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://zsrv.biz/php/cfg004.bin	82.165.37.26

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:42 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:52 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:47 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:37 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:47 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:37 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:42 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:52 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

GET /php/cfg004.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: zsrv.biz

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.4.7

Date: Sat, 31 May 2014 03:24:57 GMT

Content-Type: text/html

Content-Length: 570

Connection: close

<html>..<head><title>404 Not Found</title></head>..<body bgcolor="white">..<center><h1>404 Not Found</h1></center>..<hr><center>nginx/1.4.7</center>..</body>..</html>................

Map

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

Strings from Dumps

Explorer.EXE_532_rwx_01E00000_00026000:

.text

`.data

.reloc

http://www.google.com/webhp

userenv.dll

del "%s"

if exist "%s" goto d

del /F "%s"

Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1)

HTTP/1.1

urlmon.dll

cabinet.dll

http://

https://

HTTP/1.

PR_OpenTCPSocket

gdiplus.dll

GdiplusShutdown

ole32.dll

gdi32.dll

squvUDPZy^K]|FANZ

8#"0 9>0

1,/*<:=32$

"?2&!0#8

= *9=*:,:

}4!74&2|

%"7!:4;2

/)60-#,%

51'33;;2<*

SSSh05

SSShP7

GetProcessHeap

KERNEL32.dll

MsgWaitForMultipleObjects

ExitWindowsEx

MapVirtualKeyW

GetKeyboardState

SetKeyboardState

OpenWindowStationW

GetProcessWindowStation

CreateWindowStationW

CloseWindowStation

SetProcessWindowStation

USER32.dll

RegCreateKeyExW

RegOpenKeyExW

RegCloseKey

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

GetUrlCacheEntryInfoW

HttpAddRequestHeadersW

HttpAddRequestHeadersA

HttpSendRequestA

InternetCrackUrlA

HttpOpenRequestA

WININET.dll

OLEAUT32.dll

NETAPI32.dll

?$?*?0?^?{?

9!: :1:;:

kernel32.dll

"%s" %s

/c "%s"

%sx.%s

%sx

nspr4.dll

cGlobal\XXX

SysShadow

%Documents and Settings%\%current user%\Application Data\Ybgyk\feyfx.tuc

%Documents and Settings%\%current user%\Application Data\Ybgyk

feyfx.tuc

%Documents and Settings%\%current user%\Application Data

{B6E023F6-5FFE-6FA5-55CF-EC97D3907B28}

Global\{209B91DD-EDD5-F9DE-55CF-EC97D3907B28}

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps