Gen.Variant.Kazy.165_d7b46c388f

by malwarelabrobot on September 20th, 2014 in Malware Descriptions.

HEUR:Trojan.Win32.Generic (Kaspersky), Gen:Variant.Kazy.165 (B) (Emsisoft), Gen:Variant.Kazy.165 (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: d7b46c388fe5666a2ee99f5d62b54a1d
SHA1: ee588b477dc19b04d381a78e011c62cf00b096d2
SHA256: 1679a71143a32e8a4002fea66032ac83fdf21463dcfa9c42ad2ab83cf31937bf
SSDeep: 3072:C4m5miWR6kw c/j7vp/C6 2cgzo4FREHgEEBx1yTSQwC:CRsNg/j7SZioqREHgEwQX
Size: 141824 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: BorlandDelphi30, UPolyXv05_v6
Company: no certificate found
Created at: 2014-08-23 10:33:44
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 creates the following process(es):

sizao.exe:140
%original file name%.exe:580

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

Explorer.EXE:1140

Mutexes

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

File activity

The process %original file name%.exe:580 makes changes in the file system.
The Trojan creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Application Data\Niku\sizao.exe (141 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\tmpc6c8d54b.bat (177 bytes)

Registry activity

The process sizao.exe:140 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "1D B1 B0 28 6D 85 C7 87 95 B2 D5 11 C6 C0 62 51"

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

The process %original file name%.exe:580 makes changes in the system registry.
The Trojan creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "F0 BD ED 27 B0 79 F1 89 59 0D 61 6F 65 55 93 5C"

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

[HKCU\Software\Microsoft\Piywa]
"Bitakeaq" = "E3 66 36 8D D1 12 48 B6 3E 59 6C 67 37 05 CB D6"

Dropped PE files

MD5 File path
f3d282cf8fec3760ae4a6d66cb027827 c:\Documents and Settings\"%CurrentUserName%"\Application Data\Niku\sizao.exe

HOSTS file anomalies

No changes have been detected.

Rootkit activity

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

HttpSendRequestExA
HttpSendRequestW
InternetReadFileExA
InternetQueryDataAvailable
HttpSendRequestExW
InternetReadFile
HttpQueryInfoA
HttpSendRequestA
InternetCloseHandle

The Trojan installs the following user-mode hooks in CRYPT32.dll:

PFXImportCertStore

The Trojan 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 installs the following user-mode hooks in WS2_32.dll:

WSASend
send
closesocket

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

GetFileAttributesExW

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

LdrLoadDll
NtCreateThread

Propagation

VersionInfo

No information is available.

PE Sections

Name Virtual Address Virtual Size Raw Size Entropy Section MD5
.text 4096 132676 133120 4.63829 3b5f77ddd207df8c6358f528f9d28ce0
.data 139264 8268 1024 1.09466 66cf33f72e1518b5f5ac07f5ea09f178
.reloc 151552 5738 6144 3.90878 afb6ed3d8fd907dd00b0cc52ff773c33

Dropped from:

Downloaded by:

Similar by SSDeep:

Similar by Lavasoft Polymorphic Checker:

URLs

URL IP
hxxp://162.213.250.240/config.bin


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 /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:25 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:13 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:07 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:19 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:19 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:25 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-/..



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:13 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...



GET /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: 162.213.250.240
Cache-Control: no-cache


HTTP/1.1 404 Not Found
Date: Fri, 19 Sep 2014 17:55:08 GMT
Server: Apache/2.2.16 (Debian)
Vary: Accept-Encoding
Content-Length: 289
Connection: close
Content-Type: text/html; charset=iso-8859-1
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">.<html>&
lt;head>.<title>404 Not Found</title>.</head><
body>.<h1>Not Found</h1>.<p>The requested URL /co
nfig.bin was not found on this server.</p>.<hr>.<addres
s>Apache/2.2.16 (Debian) Server at 162.213.250.240 Port 80</addr
ess>.</body></html>...

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

Explorer.EXE_1140_rwx_01E00000_00027000:

.text
`.data
.reloc
PR_OpenTCPSocket
HTTP/1.1
hXXp://
hXXps://
HTTP/1.
)472$"% *<
(563%#$* =
"?2&!0#8
>#.:=,?$
5E6/1&
.yVX`|y
8%/<8/?)?/
%/><!8?>!
VJL%uxu"2#")0.9gy}*dM
hXXp://VVV.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)
urlmon.dll
cabinet.dll
gdiplus.dll
GdiplusShutdown
ole32.dll
gdi32.dll
SSSh41
GetProcessHeap
KERNEL32.dll
ExitWindowsEx
SetKeyboardState
OpenWindowStationW
GetProcessWindowStation
CreateWindowStationW
CloseWindowStation
SetProcessWindowStation
GetKeyboardState
MsgWaitForMultipleObjects
MapVirtualKeyW
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
GetUrlCacheEntryInfoW
HttpAddRequestHeadersW
HttpAddRequestHeadersA
InternetCrackUrlA
HttpOpenRequestA
WININET.dll
OLEAUT32.dll
NETAPI32.dll
nspr4.dll
SysShadow
cGlobal\XXX
kernel32.dll
"%s" %s
/c "%s"
%sx.%s
%sx
%Documents and Settings%\%current user%\Application Data
{3F11FFF9-326E-AE28-E288-E04225BAEE77}
Global\{A96A4DDC-804B-3853-E288-E04225BAEE77}
%Documents and Settings%\%current user%\Application Data\Uxep\oqca.ewe
%Documents and Settings%\%current user%\Application Data\Uxep
oqca.ewe


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):

    sizao.exe:140
    %original file name%.exe:580

  3. Delete the original Trojan file.
  4. Delete or disinfect the following files created/modified by the Trojan:

    %Documents and Settings%\%current user%\Application Data\Niku\sizao.exe (141 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\tmpc6c8d54b.bat (177 bytes)

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

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

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