TrojanPSW.Win32.Zbot_6e4e48dc7c

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

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

quug.exe:2548
tmp.exe:3720
.exe:1172
%original file name%.exe:2576

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

Explorer.EXE:1948

Mutexes

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

File activity

The process tmp.exe:3720 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\Vetuel\quug.exe (141 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp03baa6a1.bat (213 bytes)

The process %original file name%.exe:2576 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\tmp.exe (141 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\ .exe (35 bytes)
%System%\drivers\etc\hosts (216 bytes)

Registry activity

The process quug.exe:2548 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" = "E5 B9 59 E9 8C 73 75 05 25 7D AB 26 85 8E A8 41"

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

The process tmp.exe:3720 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" = "D8 AA 04 1A 82 46 4B 89 B2 8A 8E 55 BD E8 9A 25"

[HKCU\Software\Microsoft\Gequhu]
"Ysti" = "EC 98 78 48 7B A8 A6 2A A0 90 E0 D4 9B 32 B4 1E"

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

The process .exe:1172 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" = "BC 3E 25 14 4D 35 97 F9 72 A2 6F AC 01 F5 95 81"

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

The process %original file name%.exe:2576 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" = "FD 29 B6 4E FB A7 0D 47 E5 7F AC CB 64 22 85 06"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f3-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap]
"AutoDetect" = "1"
[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{773a730e-74fb-11e2-b597-000c293bdf2f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f2-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Gequhu]
"Ysti" = "EC 98 78 48 7B A8 A6 2A A0 90 E0 D4 9B 32 B4 1E"

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

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{fdd9f6f5-7454-11e2-b4cd-806d6172696f}]
"BaseClass" = "Drive"

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

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"

Dropped PE files

MD5	File path
ea7758700ae80579bc07defb1129497d	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Vetuel\quug.exe
e0d21bee6dae44a7c6e1896d7a8c7463	c:\Documents and Settings\"%CurrentUserName%"\Local Settings\Temp\ .exe

HOSTS file anomalies

The Trojan-PSW modifies "%System%\drivers\etc\hosts" file which is used to translate DNS entries to IP addresses. The modified file is 216 bytes in size. The following strings are added to the hosts file listed below:

127.0.0.1	www.website.com
127.0.0.1	www.website.com
127.0.0.1	www.website.com
127.0.0.1	www.website.com
127.0.0.1	www.website.com
127.0.0.1	www.website.com
127.0.0.1	www.website.com
127.0.0.1	www.website.com

Rootkit activity

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

HttpSendRequestExW
HttpSendRequestExA
InternetReadFileExA
HttpSendRequestA
HttpSendRequestW
InternetQueryDataAvailable
InternetCloseHandle
HttpQueryInfoA
InternetReadFile

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

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):

   quug.exe:2548
   tmp.exe:3720
   .exe:1172
   %original file name%.exe:2576
   

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%\Application Data\Vetuel\quug.exe (141 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\tmp03baa6a1.bat (213 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\tmp.exe (141 bytes)
   %Documents and Settings%\%current user%\Local Settings\Temp\ .exe (35 bytes)
   %System%\drivers\etc\hosts (216 bytes)

5. Restore the original content of the HOSTS file (%System%\drivers\etc\hosts): 127.0.0.1 localhost
   
6. Reboot the computer.
   

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

Static Analysis

VersionInfo

Company Name: grtrading
Product Name: grtrading
Product Version: 1.0.0.0
Legal Copyright: 3487443
Legal Trademarks: grtrading
Original Filename: force.exe
Internal Name: force.exe
File Version: 1.0
File Description: receipt
Comments: Þscription%
Language: Language Neutral

Company Name: grtradingProduct Name: grtradingProduct Version: 1.0.0.0Legal Copyright: 3487443Legal Trademarks: grtradingOriginal Filename: force.exeInternal Name: force.exeFile Version: 1.0 File Description: receiptComments: Þscription%Language: Language Neutral

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.rsrc	8192	5312	5632	2.99546	83c3500efa89bccdd0d13316d27d7cca
.text	16384	422168	422400	5.25796	46f9d7a7d4c2463391e7687413e5dec0
.reloc	442368	12	512	0.084755	0c2499b5f0b897f09d226af40b0979a5

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_1948_rwx_01100000_00027000:

.text

.text

`.data

`.data

.reloc

.reloc

http://www.google.com/webhp

http://www.google.com/webhp

PR_OpenTCPSocket

PR_OpenTCPSocket

ORZ[UZj_%STO

ORZ[UZj_%STO

gdiplus.dll

gdiplus.dll

GdiplusShutdown

GdiplusShutdown

ole32.dll

ole32.dll

gdi32.dll

gdi32.dll

: ;2*8.>

: ;2*8.>

3.#70!2)

3.#70!2)

x#m`a`cmddt-

x#m`a`cmddt-

6 !26!1'1

6 !26!1'1

7"52),,>

7"52),,>

;<)?$*%,

;<)?$*%,

71.(5;4=

71.(5;4=

(203,2$0

(203,2$0

/?./,5 <</pre><pre>:>(<<44=3%</pre><pre>8%/<8/?)?/</pre><pre>%/><!8?>!</!8?></pre><pre>HTTP/1.1</pre><pre>userenv.dll</pre><pre>del "%s"</pre><pre>if exist "%s" goto d</pre><pre>del /F "%s"</pre><pre>Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; SV1)</pre><pre>urlmon.dll</pre><pre>cabinet.dll</pre><pre>http://</pre><pre>https://</pre><pre>HTTP/1.</pre><pre>SSSh,4</pre><pre>GetProcessHeap</pre><pre>KERNEL32.dll</pre><pre>SetKeyboardState</pre><pre>ExitWindowsEx</pre><pre>MsgWaitForMultipleObjects</pre><pre>MapVirtualKeyW</pre><pre>GetKeyboardState</pre><pre>OpenWindowStationW</pre><pre>GetProcessWindowStation</pre><pre>CreateWindowStationW</pre><pre>CloseWindowStation</pre><pre>SetProcessWindowStation</pre><pre>USER32.dll</pre><pre>RegOpenKeyExW</pre><pre>RegEnumKeyExW</pre><pre>RegCloseKey</pre><pre>RegCreateKeyExW</pre><pre>ADVAPI32.dll</pre><pre>PathIsURLW</pre><pre>UrlUnescapeA</pre><pre>SHDeleteKeyW</pre><pre>SHLWAPI.dll</pre><pre>ShellExecuteW</pre><pre>SHELL32.dll</pre><pre>Secur32.dll</pre><pre>SetViewportOrgEx</pre><pre>GDI32.dll</pre><pre>WS2_32.dll</pre><pre>PFXImportCertStore</pre><pre>CertDeleteCertificateFromStore</pre><pre>CertOpenSystemStoreW</pre><pre>CertCloseStore</pre><pre>CertEnumCertificatesInStore</pre><pre>CertDuplicateCertificateContext</pre><pre>PFXExportCertStoreEx</pre><pre>CRYPT32.dll</pre><pre>HttpSendRequestExA</pre><pre>HttpQueryInfoA</pre><pre>HttpSendRequestExW</pre><pre>HttpSendRequestW</pre><pre>HttpSendRequestA</pre><pre>InternetCrackUrlA</pre><pre>HttpOpenRequestA</pre><pre>HttpAddRequestHeadersA</pre><pre>GetUrlCacheEntryInfoW</pre><pre>HttpAddRequestHeadersW</pre><pre>WININET.dll</pre><pre>OLEAUT32.dll</pre><pre>NETAPI32.dll</pre><pre>6 6&6/656{6</pre><pre>cGlobal\XXX</pre><pre>nspr4.dll</pre><pre>nss3.dll</pre><pre>SysShadow</pre><pre>kernel32.dll</pre><pre>"%s" %s</pre><pre>/c "%s"</pre><pre>%sx.%s</pre><pre>%sx</pre><pre>%Documents and Settings%\%current user%\Application Data\Uncu\isluq.qey</pre><pre>%Documents and Settings%\%current user%\Application Data\Uncu</pre><pre>isluq.qey</pre><pre>Global\{6B8FD7C2-0BD2-D9FA-CE37-AE2463C2A454}</pre><pre>%Documents and Settings%\%current user%\Application Data</pre><pre>{FDF465E7-B9F7-4F81-CE37-AE2463C2A454}</pre>