TrojanPSW.Win32.Zbot_b298e002a6 – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

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

%original file name%.exe:452
%original file name%.exe:828
doreo.exe:436
doreo.exe:1144

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

Explorer.EXE:1684

Mutexes

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

File activity

The process %original file name%.exe:452 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\Microsoft\TFhWkG.exe (673 bytes)

The process %original file name%.exe:828 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\tmp5d0aa66c.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Iqirov\doreo.exe (188 bytes)

Registry activity

The process %original file name%.exe:452 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" = "A3 95 5B 28 B3 66 97 7C 87 6B DA 71 B4 79 4B 6D"

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

To automatically run itself each time Windows is booted, the Trojan-PSW adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"oSILlzCw" = "%Documents and Settings%\%current user%\Application Data\Microsoft\TFhWkG.exe"

The process %original file name%.exe:828 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" = "F3 6E 9D E4 20 94 4F 1C AF 3D 08 1E E2 B8 FB B3"

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

The process doreo.exe:436 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" = "85 1C 54 4B 3C 80 2A 82 0D 67 D9 85 86 40 E7 A9"

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

The process doreo.exe:1144 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" = "9A CF E4 38 5B A5 2A BF CD 7D 82 D4 D2 8B 0A 11"

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

To automatically run itself each time Windows is booted, the Trojan-PSW adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"oSILlzCw" = "%Documents and Settings%\%current user%\Application Data\Microsoft\TFhWkG.exe"

Dropped PE files

MD5	File path
dde3503ecf0a333c42f665612fab95aa	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Iqirov\doreo.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:452
%original file name%.exe:828
doreo.exe:436
doreo.exe:1144
Delete the original Trojan-PSW file.
Delete or disinfect the following files created/modified by the Trojan-PSW:
%Documents and Settings%\%current user%\Application Data\Microsoft\TFhWkG.exe (673 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp5d0aa66c.bat (177 bytes)
%Documents and Settings%\%current user%\Application Data\Iqirov\doreo.exe (188 bytes)
Delete the following value(s) in the autorun key (How to Work with System Registry):
[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"oSILlzCw" = "%Documents and Settings%\%current user%\Application Data\Microsoft\TFhWkG.exe"
Reboot the computer.

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

Static Analysis

VersionInfo

Company Name:
Product Name: TFhWkG
Product Version: 5.9.3.40703
Legal Copyright: (c)2014 Th1BZu All Rights Reserved.
Legal Trademarks:
Original Filename: 2252.exe
Internal Name: 2252.exe
File Version: 5.9.3.40703
File Description: TFhWkG
Comments: TFhWkG
Language: English (United States)

Company Name: Product Name: TFhWkGProduct Version: 5.9.3.40703Legal Copyright: (c)2014 Th1BZu All Rights Reserved.Legal Trademarks: Original Filename: 2252.exeInternal Name: 2252.exeFile Version: 5.9.3.40703File Description: TFhWkGComments: TFhWkGLanguage: English (United States)

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	8192	175944	176128	5.51308	106098af469b0060a316953b2bb07b83
.rsrc	188416	11344	11776	1.91663	9d6986423f6bd4e9f22949fb0ccc991d
.reloc	204800	12	512	0.070639	bb7dfee3e7203c423f50e2d0c6a6224a

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

Map

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

Strings from Dumps

Explorer.EXE_1684_rwx_00ED0000_00027000:

.text

`.data

.reloc

hXXp://VVV.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

:>(

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

hXXp://

hXXps://

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

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\Uhdia\lebua.los

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

lebua.los

Global\{9A921A31-F848-112D-E73B-B51C030974BA}

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

{0CE9A814-4A6D-8756-E73B-B51C030974BA}

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps